CVE-2026-53049 (GCVE-0-2026-53049)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:29 – Updated: 2026-08-05 12:32
VLAI
Title
gfs2: add some missing log locking
Summary
In the Linux kernel, the following vulnerability has been resolved: gfs2: add some missing log locking Function gfs2_logd() calls the log flushing functions gfs2_ail1_start(), gfs2_ail1_wait(), and gfs2_ail1_empty() without holding sdp->sd_log_flush_lock, but these functions require exclusion against concurrent transactions. To fix that, add a non-locking __gfs2_log_flush() function. Then, in gfs2_logd(), take sdp->sd_log_flush_lock before calling the above mentioned log flushing functions and __gfs2_log_flush().
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 5e4c7632aae1cce137792647f4fb6f599d1da893 , < 3b28eb75afe520972bacc833850c2b30aa0824cd (git)
Affected: 5e4c7632aae1cce137792647f4fb6f599d1da893 , < ca95342cb1b39062a03c115830286f0a426053d5 (git)
Affected: 5e4c7632aae1cce137792647f4fb6f599d1da893 , < bf5fcd9c37c2546beaf7b401d31aefd89017dc3d (git)
Affected: 5e4c7632aae1cce137792647f4fb6f599d1da893 , < f2f225cf505ac016132ded21690f3ba0a080a4e8 (git)
Affected: 5e4c7632aae1cce137792647f4fb6f599d1da893 , < 49d9be0722da3a4a893ba905720cba1921834ec3 (git)
Affected: 5e4c7632aae1cce137792647f4fb6f599d1da893 , < 98e8bf249c790d56de1abc4a5f8bd68035a00921 (git)
Affected: 5e4c7632aae1cce137792647f4fb6f599d1da893 , < fe2c8d051150b90b3ccb85f89e3b1d636cb88ec8 (git)
Create a notification for this product.
Linux Linux Affected: 5.7
Unaffected: 0 , < 5.7 (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.141 , ≤ 6.6.* (semver)
Unaffected: 6.12.91 , ≤ 6.12.* (semver)
Unaffected: 6.18.33 , ≤ 6.18.* (semver)
Unaffected: 7.0.10 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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              "value": "AV:N - GFS2 can back kernel NFS/ksmbd exports, and remote file create/write/unlink requests reach the GFS2 VFS paths that create transactions and wake gfs2_logd. A remote attacker therefore does not need local code execution on a reasonably deployed file server using GFS2 storage.\nAC:L - The race is driven by ordinary concurrent filesystem activity and log pressure, which an attacker can create by issuing repeated parallel writes/metadata operations. No rare hardware state or uncontrollable timing condition is required beyond normal kernel scheduling.\nPR:N - In the highest reasonable deployment, a writable NFS export or guest/share can allow anonymous or unauthenticated remote write activity to reach these paths. No kernel capability or local administrative privilege is required to trigger the vulnerable log/transaction interaction in that scenario.\nUI:N - Once the GFS2 filesystem is mounted/exported, exploitation only requires attacker-initiated filesystem operations. No separate victim action is needed during the attack.\nS:U - The affected component is the host kernel filesystem implementation, and the impact remains within that kernel/filesystem security authority. This is not a VM escape, IOMMU bypass, or cross-authority boundary violation.\nC:H - The missing exclusion can corrupt GFS2 log/revoke and AIL state, making stale or incorrect filesystem contents plausibly reachable after replay or recovery. Under the required uncertainty rule, filesystem journal corruption that can expose arbitrary stored data is scored as high confidentiality impact.\nI:H - The bug affects journal/log bookkeeping that protects filesystem metadata and replay ordering, so a triggered race can corrupt or roll back arbitrary filesystem state. This is high integrity impact for a shared GFS2 volume.\nA:H - The race can lead to GFS2 withdraws, hangs, assertion failures, or filesystem unavailability under log flushing pressure. That is a high availability impact for the affected kernel/filesystem instance."
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    "cveId": "CVE-2026-53049",
    "datePublished": "2026-06-24T16:29:55.190Z",
    "dateReserved": "2026-06-09T07:44:35.381Z",
    "dateUpdated": "2026-08-05T12:32:55.082Z",
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Then, in\\ngfs2_logd(), take sdp-\u003esd_log_flush_lock before calling the above mentioned log\\nflushing functions and 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-05T14:36:25+00:00",
      "cve": "CVE-2026-53049",
      "id": "CVE-2026-53049",
      "initial_release_date": "2026-06-24T00:00:00+00:00",
      "product_status:known_affected": "198",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: gfs2: add some missing log locking",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53049.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-07-28T17:13:17Z",
      "cve": "CVE-2026-53049",
      "id": "CVE-2026-53049",
      "initial_release_date": "2026-07-01T03:19:35Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "573",
      "product_status:known_not_affected": "32",
      "product_status:recommended": "265",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-53049",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-53049.json",
      "version": "9"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.