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    14 vulnerabilities by util-linux

    CVE-2026-53615 (GCVE-0-2026-53615)

    Vulnerability from nvd – Published: 2026-10-14 15:56 – Updated: 2026-10-15 15:07
    VLAI
    Title
    util-linux libblkid DOS extended-partition overflow produces invalid partition metadata
    Summary
    util-linux is a random collection of Linux utilities. Before util-linux 2.41.4, `parse_dos_extended()` in `libblkid/src/partitions/dos.c` computes an extended-partition start sector with 32-bit addition and does not apply the extended-area bounds checks to the first two EBR entries. A local attacker who causes a crafted DOS extended-partition disk image or removable medium to be probed can wrap `cur_start + start` to sector zero and cause libblkid to report a false partition overlapping the MBR. This directly compromises the integrity of the reported partition metadata; disk modification or availability loss requires a separate downstream consumer to act on that metadata. This issue is fixed in 2.41.4.
    Severity
    8 (High)
    CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-10-14 16:11 UTC
    CWE
    • CWE-190 - Integer Overflow or Wraparound
    Assigner
    GitHub_M CNA under the mitre root
    CNA scorecard C 72/100 over 7771 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    util-linux util-linux Affected: < 2.41.4
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-53614 (GCVE-0-2026-53614)

    Vulnerability from nvd – Published: 2026-10-14 15:40 – Updated: 2026-10-15 15:08
    VLAI
    Title
    util-linux LIBMOUNT_FORCE_MOUNT2 allows nosuid and noexec bypass
    Summary
    util-linux is a random collection of Linux utilities. In util-linux 2.39.1 through 2.41.4 and 2.42 through 2.42.1, the SUID `mount` utility reads the attacker-controlled `LIBMOUNT_FORCE_MOUNT2` environment variable with `getenv()`, allowing a local low-privileged user to force the non-atomic legacy bind-mount path. With an `/etc/fstab` bind mount authorized by `user` or `users` and protected by `nosuid`, `noexec`, or `nodev`, an attacker can race the window between the initial bind mount and the remount that applies those security flags and execute a SUID program from the temporarily unprotected mount, potentially gaining root privileges. This issue is fixed in 2.41.5 and 2.42.2.
    Severity
    7 (High)
    CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-10-15 13:11 UTC
    CWE
    • CWE-269 - Improper Privilege Management
    • CWE-807 - Reliance on Untrusted Inputs in a Security Decision
    Assigner
    GitHub_M CNA under the mitre root
    CNA scorecard C 72/100 over 7771 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    util-linux util-linux Affected: >= 2.39.1, < 2.41.5
    Affected: >= 2.42, < 2.42.2
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-53613 (GCVE-0-2026-53613)

    Vulnerability from nvd – Published: 2026-10-14 14:52 – Updated: 2026-10-15 15:08
    VLAI
    Title
    util-linux mount target TOCTOU allows local privilege escalation
    Summary
    util-linux is a random collection of Linux utilities. In util-linux 2.17 through 2.41.6 and 2.42 through 2.42.3, and in 2.42.4 when the legacy `mount(2)` path is used without `/proc`, restricted non-root `mount` requests validate an `/etc/fstab` target before the mount operation re-resolves that pathname. A local low-privileged user authorized by an fstab `user` or `users` entry whose target has an attacker-writable ancestor can use `renameat2(RENAME_EXCHANGE)` to swap a path component and redirect an authorized mount to a root-owned location, such as mounting attacker-controlled content over `/etc/sudoers.d`, and thereby gain root privileges. Versions 2.41.5 and 2.42.2 pin targets for the new mount API, and 2.42.4 pins legacy targets through `/proc/self/fd`; the documented legacy fallback without `/proc` remains affected.
    Severity
    7 (High)
    CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-10-15 13:11 UTC
    CWE
    • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
    Assigner
    GitHub_M CNA under the mitre root
    CNA scorecard C 72/100 over 7771 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    util-linux util-linux Affected: >= 2.17, <= 2.41.6
    Affected: >= 2.42, <= 2.42.4
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-53612 (GCVE-0-2026-53612)

    Vulnerability from nvd – Published: 2026-10-14 14:47 – Updated: 2026-10-14 18:26
    VLAI
    Title
    util-linux mount hook_owner TOCTOU allows local privilege escalation
    Summary
    util-linux is a random collection of Linux utilities. In util-linux 2.39 through 2.41.4 and 2.42 through 2.42.1, the SUID `mount` utility's `hook_owner.c` post-mount hook performs path-based `chmod()` and `lchown()` operations on a previously validated mount target. A local low-privileged user authorized by an `/etc/fstab` entry with `user` or `users` and an `X-mount.mode`, `X-mount.owner`, or `X-mount.group` option can use `renameat2(RENAME_EXCHANGE)` to race a writable ancestor of the target and redirect the privileged ownership or mode change to a root-owned path, potentially gaining root privileges. This issue is fixed in 2.41.5 and 2.42.2.
    Severity
    7 (High)
    CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
    SSVC
    Exploitation: poc Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-10-14 18:24 UTC
    CWE
    • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
    Assigner
    GitHub_M CNA under the mitre root
    CNA scorecard C 72/100 over 7771 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    util-linux util-linux Affected: >= 2.39, < 2.41.5
    Affected: >= 2.42, < 2.42.2
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-76642 (GCVE-0-2026-76642)

    Vulnerability from nvd – Published: 2026-09-03 10:54 – Updated: 2026-09-03 14:00
    VLAI
    Title
    util-linux libmount Privilege Escalation via Failed Mount Helper
    Summary
    util-linux versions through 2.41.5 and 2.42.2 fail to check mount helper exit status before running post-mount hooks, allowing unprivileged users to execute privileged operations on pre-existing filesystems. Attackers can exploit X-mount.idmap or X-mount.owner hooks to clone filesystems with inherited suid bits or modify target inode permissions after a helper fails, achieving privilege escalation.
    Severity
    8.5 (High)
    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
    7.8 (High)
    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    SSVC
    Exploitation: poc Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-03 14:00 UTC
    CWE
    • CWE-390 - Detection of Error Condition Without Action
    Assigner
    VulnCheck CNA under the mitre root
    CNA scorecard B 84/100 over 6373 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    util-linux util-linux Affected: 2.39 , < 2.41.6 (custom)
    Affected: 2.42 , < 2.42.3 (custom)
        cpe:2.3:a:kernel:util-linux:*:*:*:*:*:*:*:*
        cpe:2.3:a:kernel:util-linux:*:*:*:*:*:*:*:*
    		Create a notification for this product.
    Date Public
    2026-09-02 00:00
    Credits
    Andreas Gabriel Berbescu Ivan Redondo Plaza
    Show details on NVD website
    To clipboard 

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    CVE-2026-27456 (GCVE-0-2026-27456)

    Vulnerability from nvd – Published: 2026-04-03 21:23 – Updated: 2026-04-06 15:42
    VLAI
    Title
    util-linux: TOCTOU Race Condition in util-linux mount(8) - Loop Device Setup
    Summary
    util-linux is a random collection of Linux utilities. Prior to version 2.41.4, a TOCTOU (Time-of-Check-Time-of-Use) vulnerability has been identified in the SUID binary /usr/bin/mount from util-linux. The mount binary, when setting up loop devices, validates the source file path with user privileges via fork() + setuid() + realpath(), but subsequently re-canonicalizes and opens it with root privileges (euid=0) without verifying that the path has not been replaced between both operations. Neither O_NOFOLLOW, nor inode comparison, nor post-open fstat() are employed. This allows a local unprivileged user to replace the source file with a symlink pointing to any root-owned file or device during the race window, causing the SUID binary to open and mount it as root. Exploitation requires an /etc/fstab entry with user,loop options whose path points to a directory where the attacker has write permission, and that /usr/bin/mount has the SUID bit set (the default configuration on virtually all Linux distributions). The impact is unauthorized read access to root-protected files and block devices, including backup images, disk volumes, and any file containing a valid filesystem. This issue has been patched in version 2.41.4.
    Severity
    4.7 (Medium)
    CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
    SSVC
    Exploitation: poc Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-04-06 15:38 UTC
    CWE
    • CWE-59 - Improper Link Resolution Before File Access ('Link Following')
    • CWE-269 - Improper Privilege Management
    • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
    Assigner
    GitHub_M CNA under the mitre root
    CNA scorecard C 72/100 over 7771 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    util-linux util-linux Affected: < 2.41.4
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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          "value": "util-linux is a random collection of Linux utilities. Prior to version 2.41.4, a TOCTOU (Time-of-Check-Time-of-Use) vulnerability has been identified in the SUID binary /usr/bin/mount from util-linux. The mount binary, when setting up loop devices, validates the source file path with user privileges via fork() + setuid() + realpath(), but subsequently re-canonicalizes and opens it with root privileges (euid=0) without verifying that the path has not been replaced between both operations. Neither O_NOFOLLOW, nor inode comparison, nor post-open fstat() are employed. This allows a local unprivileged user to replace the source file with a symlink pointing to any root-owned file or device during the race window, causing the SUID binary to open and mount it as root. Exploitation requires an /etc/fstab entry with user,loop options whose path points to a directory where the attacker has write permission, and that /usr/bin/mount has the SUID bit set (the default configuration on virtually all Linux distributions). The impact is unauthorized read access to root-protected files and block devices, including backup images, disk volumes, and any file containing a valid filesystem. This issue has been patched in version 2.41.4."
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      "metrics": [
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          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 4.7,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
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    "dateReserved": "2026-02-19T17:25:31.100Z",
    "dateUpdated": "2026-04-06T15:42:35.774Z",
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    CVE-2025-14104 (GCVE-0-2025-14104)

    Vulnerability from nvd – Published: 2025-12-05 16:22 – Updated: 2026-10-14 19:31
    VLAI
    Title
    Util-linux: util-linux: heap buffer overread in setpwnam() when processing 256-byte usernames
    Summary
    A flaw was found in util-linux. This vulnerability allows a heap buffer overread when processing 256-byte usernames, specifically within the `setpwnam()` function, affecting SUID (Set User ID) login-utils utilities writing to the password database.
    Severity
    6.1 (Medium)
    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2025-12-05 20:03 UTC
    CWE
    Assigner
    redhat CNA under the redhat root
    CNA scorecard B 82/100 over 1036 records in the last 180 days details
    References
    URL Tags
    https://access.redhat.com/errata/RHSA-2026:1696 vendor-advisoryx_refsource_REDHAT
    https://access.redhat.com/errata/RHSA-2026:1852 vendor-advisoryx_refsource_REDHAT
    https://access.redhat.com/errata/RHSA-2026:1913 vendor-advisoryx_refsource_REDHAT
    https://access.redhat.com/errata/RHSA-2026:2485 vendor-advisoryx_refsource_REDHAT
    https://access.redhat.com/errata/RHSA-2026:2563 vendor-advisoryx_refsource_REDHAT
    https://access.redhat.com/errata/RHSA-2026:2737 vendor-advisoryx_refsource_REDHAT
    https://access.redhat.com/errata/RHSA-2026:2800 vendor-advisoryx_refsource_REDHAT
    https://access.redhat.com/errata/RHSA-2026:3406 vendor-advisoryx_refsource_REDHAT
    https://access.redhat.com/errata/RHSA-2026:4943 vendor-advisoryx_refsource_REDHAT
    https://access.redhat.com/errata/RHSA-2026:7180 vendor-advisoryx_refsource_REDHAT
    https://access.redhat.com/errata/RHSA-2026:82347 vendor-advisoryx_refsource_REDHAT
    https://access.redhat.com/errata/RHSA-2026:82354 vendor-advisoryx_refsource_REDHAT
    https://access.redhat.com/errata/RHSA-2026:82372 vendor-advisoryx_refsource_REDHAT
    https://access.redhat.com/errata/RHSA-2026:82857 vendor-advisoryx_refsource_REDHAT
    https://access.redhat.com/security/cve/CVE-2025-14104 vdb-entryx_refsource_REDHAT
    https://bugzilla.redhat.com/show_bug.cgi?id=2419369 issue-trackingx_refsource_REDHAT
    Impacted products
    Vendor Product Version
    util-linux util-linux Affected: 0 , < 2.41.3 (semver)
    		Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 10 Unaffected: 0:2.40.2-15.el10_1 , < * (rpm)
        cpe:/o:redhat:enterprise_linux:10.1
    		Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:2.32.1-48.el8_10 , < * (rpm)
        cpe:/a:redhat:enterprise_linux:8::appstream
        cpe:/a:redhat:enterprise_linux:8::crb
        cpe:/o:redhat:enterprise_linux:8::baseos
    		Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:2.37.4-21.el9_7 , < * (rpm)
        cpe:/a:redhat:enterprise_linux:9::appstream
        cpe:/a:redhat:enterprise_linux:9::crb
        cpe:/o:redhat:enterprise_linux:9::baseos
    		Create a notification for this product.
    Red Hat Cert Manager support for Red Hat OpenShift release 1.18 Unaffected: 1791459707 , < * (rpm)
        cpe:/a:redhat:cert_manager:1.18::el9
    		Create a notification for this product.
    Red Hat Cert Manager support for Red Hat OpenShift release 1.18 Unaffected: 1791459711 , < * (rpm)
        cpe:/a:redhat:cert_manager:1.18::el9
    		Create a notification for this product.
    Red Hat Cert Manager support for Red Hat OpenShift release 1.18 Unaffected: 1791459759 , < * (rpm)
        cpe:/a:redhat:cert_manager:1.18::el9
    		Create a notification for this product.
    Red Hat Cert Manager support for Red Hat OpenShift release 1.18 Unaffected: 1789029076 , < * (rpm)
        cpe:/a:redhat:cert_manager:1.18::el9
    		Create a notification for this product.
    Red Hat Cert Manager support for Red Hat OpenShift release 1.18 Unaffected: 1791966259 , < * (rpm)
        cpe:/a:redhat:cert_manager:1.18::el9
    		Create a notification for this product.
    Red Hat Red Hat Ceph Storage 7 Unaffected: 1770632724 , < * (rpm)
        cpe:/a:redhat:ceph_storage:7::el9
    		Create a notification for this product.
    Red Hat Red Hat Ceph Storage 8 Unaffected: 1770630907 , < * (rpm)
        cpe:/a:redhat:ceph_storage:8::el9
    		Create a notification for this product.
    Red Hat Red Hat Ceph Storage 9 Unaffected: 1771816028 , < * (rpm)
        cpe:/a:redhat:ceph_storage:9::el10
    		Create a notification for this product.
    Red Hat Red Hat Hardened Images Unaffected: 2.42-7.1.hum1 , < * (rpm)
        cpe:/a:redhat:hummingbird:1
    		Create a notification for this product.
    Red Hat Red Hat Insights proxy 1.5 Unaffected: 1770740405 , < * (rpm)
        cpe:/a:redhat:insights_proxy:1.5::el9
    		Create a notification for this product.
    Red Hat Red Hat Update Infrastructure 5 Unaffected: 1770646925 , < * (rpm)
        cpe:/a:redhat:rhui:5::el9
    		Create a notification for this product.
    Red Hat Red Hat Update Infrastructure 5 Unaffected: 1773670073 , < * (rpm)
        cpe:/a:redhat:rhui:5::el9
    		Create a notification for this product.
    Red Hat Red Hat Update Infrastructure 5 Unaffected: 1773672059 , < * (rpm)
        cpe:/a:redhat:rhui:5::el9
    		Create a notification for this product.
    Red Hat Red Hat Update Infrastructure 5 Unaffected: 1773670137 , < * (rpm)
        cpe:/a:redhat:rhui:5::el9
    		Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
    		Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 7     cpe:/o:redhat:enterprise_linux:7
    		Create a notification for this product.
    Red Hat Red Hat OpenShift Container Platform 4     cpe:/a:redhat:openshift:4
    		Create a notification for this product.
    Date Public
    2025-12-05 00:00
    Show details on NVD website
    To clipboard 

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    CVE-2026-53615 (GCVE-0-2026-53615)

    Vulnerability from cvelistv5 – Published: 2026-10-14 15:56 – Updated: 2026-10-15 15:07
    VLAI
    Title
    util-linux libblkid DOS extended-partition overflow produces invalid partition metadata
    Summary
    util-linux is a random collection of Linux utilities. Before util-linux 2.41.4, `parse_dos_extended()` in `libblkid/src/partitions/dos.c` computes an extended-partition start sector with 32-bit addition and does not apply the extended-area bounds checks to the first two EBR entries. A local attacker who causes a crafted DOS extended-partition disk image or removable medium to be probed can wrap `cur_start + start` to sector zero and cause libblkid to report a false partition overlapping the MBR. This directly compromises the integrity of the reported partition metadata; disk modification or availability loss requires a separate downstream consumer to act on that metadata. This issue is fixed in 2.41.4.
    Severity
    8 (High)
    CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-10-14 16:11 UTC
    CWE
    • CWE-190 - Integer Overflow or Wraparound
    Assigner
    GitHub_M CNA under the mitre root
    CNA scorecard C 72/100 over 7771 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    util-linux util-linux Affected: < 2.41.4
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-53614 (GCVE-0-2026-53614)

    Vulnerability from cvelistv5 – Published: 2026-10-14 15:40 – Updated: 2026-10-15 15:08
    VLAI
    Title
    util-linux LIBMOUNT_FORCE_MOUNT2 allows nosuid and noexec bypass
    Summary
    util-linux is a random collection of Linux utilities. In util-linux 2.39.1 through 2.41.4 and 2.42 through 2.42.1, the SUID `mount` utility reads the attacker-controlled `LIBMOUNT_FORCE_MOUNT2` environment variable with `getenv()`, allowing a local low-privileged user to force the non-atomic legacy bind-mount path. With an `/etc/fstab` bind mount authorized by `user` or `users` and protected by `nosuid`, `noexec`, or `nodev`, an attacker can race the window between the initial bind mount and the remount that applies those security flags and execute a SUID program from the temporarily unprotected mount, potentially gaining root privileges. This issue is fixed in 2.41.5 and 2.42.2.
    Severity
    7 (High)
    CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-10-15 13:11 UTC
    CWE
    • CWE-269 - Improper Privilege Management
    • CWE-807 - Reliance on Untrusted Inputs in a Security Decision
    Assigner
    GitHub_M CNA under the mitre root
    CNA scorecard C 72/100 over 7771 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    util-linux util-linux Affected: >= 2.39.1, < 2.41.5
    Affected: >= 2.42, < 2.42.2
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-53613 (GCVE-0-2026-53613)

    Vulnerability from cvelistv5 – Published: 2026-10-14 14:52 – Updated: 2026-10-15 15:08
    VLAI
    Title
    util-linux mount target TOCTOU allows local privilege escalation
    Summary
    util-linux is a random collection of Linux utilities. In util-linux 2.17 through 2.41.6 and 2.42 through 2.42.3, and in 2.42.4 when the legacy `mount(2)` path is used without `/proc`, restricted non-root `mount` requests validate an `/etc/fstab` target before the mount operation re-resolves that pathname. A local low-privileged user authorized by an fstab `user` or `users` entry whose target has an attacker-writable ancestor can use `renameat2(RENAME_EXCHANGE)` to swap a path component and redirect an authorized mount to a root-owned location, such as mounting attacker-controlled content over `/etc/sudoers.d`, and thereby gain root privileges. Versions 2.41.5 and 2.42.2 pin targets for the new mount API, and 2.42.4 pins legacy targets through `/proc/self/fd`; the documented legacy fallback without `/proc` remains affected.
    Severity
    7 (High)
    CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-10-15 13:11 UTC
    CWE
    • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
    Assigner
    GitHub_M CNA under the mitre root
    CNA scorecard C 72/100 over 7771 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    util-linux util-linux Affected: >= 2.17, <= 2.41.6
    Affected: >= 2.42, <= 2.42.4
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

    {
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    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-53613",
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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    "cveId": "CVE-2026-53613",
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    CVE-2026-53612 (GCVE-0-2026-53612)

    Vulnerability from cvelistv5 – Published: 2026-10-14 14:47 – Updated: 2026-10-14 18:26
    VLAI
    Title
    util-linux mount hook_owner TOCTOU allows local privilege escalation
    Summary
    util-linux is a random collection of Linux utilities. In util-linux 2.39 through 2.41.4 and 2.42 through 2.42.1, the SUID `mount` utility's `hook_owner.c` post-mount hook performs path-based `chmod()` and `lchown()` operations on a previously validated mount target. A local low-privileged user authorized by an `/etc/fstab` entry with `user` or `users` and an `X-mount.mode`, `X-mount.owner`, or `X-mount.group` option can use `renameat2(RENAME_EXCHANGE)` to race a writable ancestor of the target and redirect the privileged ownership or mode change to a root-owned path, potentially gaining root privileges. This issue is fixed in 2.41.5 and 2.42.2.
    Severity
    7 (High)
    CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
    SSVC
    Exploitation: poc Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-10-14 18:24 UTC
    CWE
    • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
    Assigner
    GitHub_M CNA under the mitre root
    CNA scorecard C 72/100 over 7771 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    util-linux util-linux Affected: >= 2.39, < 2.41.5
    Affected: >= 2.42, < 2.42.2
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

    {
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    CVE-2026-76642 (GCVE-0-2026-76642)

    Vulnerability from cvelistv5 – Published: 2026-09-03 10:54 – Updated: 2026-09-03 14:00
    VLAI
    Title
    util-linux libmount Privilege Escalation via Failed Mount Helper
    Summary
    util-linux versions through 2.41.5 and 2.42.2 fail to check mount helper exit status before running post-mount hooks, allowing unprivileged users to execute privileged operations on pre-existing filesystems. Attackers can exploit X-mount.idmap or X-mount.owner hooks to clone filesystems with inherited suid bits or modify target inode permissions after a helper fails, achieving privilege escalation.
    Severity
    8.5 (High)
    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
    7.8 (High)
    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    SSVC
    Exploitation: poc Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-03 14:00 UTC
    CWE
    • CWE-390 - Detection of Error Condition Without Action
    Assigner
    VulnCheck CNA under the mitre root
    CNA scorecard B 84/100 over 6373 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    util-linux util-linux Affected: 2.39 , < 2.41.6 (custom)
    Affected: 2.42 , < 2.42.3 (custom)
        cpe:2.3:a:kernel:util-linux:*:*:*:*:*:*:*:*
        cpe:2.3:a:kernel:util-linux:*:*:*:*:*:*:*:*
    		Create a notification for this product.
    Date Public
    2026-09-02 00:00
    Credits
    Andreas Gabriel Berbescu Ivan Redondo Plaza
    Show details on NVD website
    To clipboard 

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    CVE-2026-27456 (GCVE-0-2026-27456)

    Vulnerability from cvelistv5 – Published: 2026-04-03 21:23 – Updated: 2026-04-06 15:42
    VLAI
    Title
    util-linux: TOCTOU Race Condition in util-linux mount(8) - Loop Device Setup
    Summary
    util-linux is a random collection of Linux utilities. Prior to version 2.41.4, a TOCTOU (Time-of-Check-Time-of-Use) vulnerability has been identified in the SUID binary /usr/bin/mount from util-linux. The mount binary, when setting up loop devices, validates the source file path with user privileges via fork() + setuid() + realpath(), but subsequently re-canonicalizes and opens it with root privileges (euid=0) without verifying that the path has not been replaced between both operations. Neither O_NOFOLLOW, nor inode comparison, nor post-open fstat() are employed. This allows a local unprivileged user to replace the source file with a symlink pointing to any root-owned file or device during the race window, causing the SUID binary to open and mount it as root. Exploitation requires an /etc/fstab entry with user,loop options whose path points to a directory where the attacker has write permission, and that /usr/bin/mount has the SUID bit set (the default configuration on virtually all Linux distributions). The impact is unauthorized read access to root-protected files and block devices, including backup images, disk volumes, and any file containing a valid filesystem. This issue has been patched in version 2.41.4.
    Severity
    4.7 (Medium)
    CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
    SSVC
    Exploitation: poc Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-04-06 15:38 UTC
    CWE
    • CWE-59 - Improper Link Resolution Before File Access ('Link Following')
    • CWE-269 - Improper Privilege Management
    • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
    Assigner
    GitHub_M CNA under the mitre root
    CNA scorecard C 72/100 over 7771 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    util-linux util-linux Affected: < 2.41.4
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2025-14104 (GCVE-0-2025-14104)

    Vulnerability from cvelistv5 – Published: 2025-12-05 16:22 – Updated: 2026-10-14 19:31
    VLAI
    Title
    Util-linux: util-linux: heap buffer overread in setpwnam() when processing 256-byte usernames
    Summary
    A flaw was found in util-linux. This vulnerability allows a heap buffer overread when processing 256-byte usernames, specifically within the `setpwnam()` function, affecting SUID (Set User ID) login-utils utilities writing to the password database.
    Severity
    6.1 (Medium)
    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2025-12-05 20:03 UTC
    CWE
    Assigner
    redhat CNA under the redhat root
    CNA scorecard B 82/100 over 1036 records in the last 180 days details
    References
    URL Tags
    https://access.redhat.com/errata/RHSA-2026:1696 vendor-advisoryx_refsource_REDHAT
    https://access.redhat.com/errata/RHSA-2026:1852 vendor-advisoryx_refsource_REDHAT
    https://access.redhat.com/errata/RHSA-2026:1913 vendor-advisoryx_refsource_REDHAT
    https://access.redhat.com/errata/RHSA-2026:2485 vendor-advisoryx_refsource_REDHAT
    https://access.redhat.com/errata/RHSA-2026:2563 vendor-advisoryx_refsource_REDHAT
    https://access.redhat.com/errata/RHSA-2026:2737 vendor-advisoryx_refsource_REDHAT
    https://access.redhat.com/errata/RHSA-2026:2800 vendor-advisoryx_refsource_REDHAT
    https://access.redhat.com/errata/RHSA-2026:3406 vendor-advisoryx_refsource_REDHAT
    https://access.redhat.com/errata/RHSA-2026:4943 vendor-advisoryx_refsource_REDHAT
    https://access.redhat.com/errata/RHSA-2026:7180 vendor-advisoryx_refsource_REDHAT
    https://access.redhat.com/errata/RHSA-2026:82347 vendor-advisoryx_refsource_REDHAT
    https://access.redhat.com/errata/RHSA-2026:82354 vendor-advisoryx_refsource_REDHAT
    https://access.redhat.com/errata/RHSA-2026:82372 vendor-advisoryx_refsource_REDHAT
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    https://access.redhat.com/security/cve/CVE-2025-14104 vdb-entryx_refsource_REDHAT
    https://bugzilla.redhat.com/show_bug.cgi?id=2419369 issue-trackingx_refsource_REDHAT
    Impacted products
    Vendor Product Version
    util-linux util-linux Affected: 0 , < 2.41.3 (semver)
    		Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 10 Unaffected: 0:2.40.2-15.el10_1 , < * (rpm)
        cpe:/o:redhat:enterprise_linux:10.1
    		Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:2.32.1-48.el8_10 , < * (rpm)
        cpe:/a:redhat:enterprise_linux:8::appstream
        cpe:/a:redhat:enterprise_linux:8::crb
        cpe:/o:redhat:enterprise_linux:8::baseos
    		Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:2.37.4-21.el9_7 , < * (rpm)
        cpe:/a:redhat:enterprise_linux:9::appstream
        cpe:/a:redhat:enterprise_linux:9::crb
        cpe:/o:redhat:enterprise_linux:9::baseos
    		Create a notification for this product.
    Red Hat Cert Manager support for Red Hat OpenShift release 1.18 Unaffected: 1791459707 , < * (rpm)
        cpe:/a:redhat:cert_manager:1.18::el9
    		Create a notification for this product.
    Red Hat Cert Manager support for Red Hat OpenShift release 1.18 Unaffected: 1791459711 , < * (rpm)
        cpe:/a:redhat:cert_manager:1.18::el9
    		Create a notification for this product.
    Red Hat Cert Manager support for Red Hat OpenShift release 1.18 Unaffected: 1791459759 , < * (rpm)
        cpe:/a:redhat:cert_manager:1.18::el9
    		Create a notification for this product.
    Red Hat Cert Manager support for Red Hat OpenShift release 1.18 Unaffected: 1789029076 , < * (rpm)
        cpe:/a:redhat:cert_manager:1.18::el9
    		Create a notification for this product.
    Red Hat Cert Manager support for Red Hat OpenShift release 1.18 Unaffected: 1791966259 , < * (rpm)
        cpe:/a:redhat:cert_manager:1.18::el9
    		Create a notification for this product.
    Red Hat Red Hat Ceph Storage 7 Unaffected: 1770632724 , < * (rpm)
        cpe:/a:redhat:ceph_storage:7::el9
    		Create a notification for this product.
    Red Hat Red Hat Ceph Storage 8 Unaffected: 1770630907 , < * (rpm)
        cpe:/a:redhat:ceph_storage:8::el9
    		Create a notification for this product.
    Red Hat Red Hat Ceph Storage 9 Unaffected: 1771816028 , < * (rpm)
        cpe:/a:redhat:ceph_storage:9::el10
    		Create a notification for this product.
    Red Hat Red Hat Hardened Images Unaffected: 2.42-7.1.hum1 , < * (rpm)
        cpe:/a:redhat:hummingbird:1
    		Create a notification for this product.
    Red Hat Red Hat Insights proxy 1.5 Unaffected: 1770740405 , < * (rpm)
        cpe:/a:redhat:insights_proxy:1.5::el9
    		Create a notification for this product.
    Red Hat Red Hat Update Infrastructure 5 Unaffected: 1770646925 , < * (rpm)
        cpe:/a:redhat:rhui:5::el9
    		Create a notification for this product.
    Red Hat Red Hat Update Infrastructure 5 Unaffected: 1773670073 , < * (rpm)
        cpe:/a:redhat:rhui:5::el9
    		Create a notification for this product.
    Red Hat Red Hat Update Infrastructure 5 Unaffected: 1773672059 , < * (rpm)
        cpe:/a:redhat:rhui:5::el9
    		Create a notification for this product.
    Red Hat Red Hat Update Infrastructure 5 Unaffected: 1773670137 , < * (rpm)
        cpe:/a:redhat:rhui:5::el9
    		Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
    		Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 7     cpe:/o:redhat:enterprise_linux:7
    		Create a notification for this product.
    Red Hat Red Hat OpenShift Container Platform 4     cpe:/a:redhat:openshift:4
    		Create a notification for this product.
    Date Public
    2025-12-05 00:00
    Show details on NVD website
    To clipboard 

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