Vulnerability-Lookup

CVE-2026-64375 (GCVE-0-2026-64375)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:50 – Updated: 2026-07-25 08:50

Title

proc: protect ptrace_may_access() with exec_update_lock (FD links)

Summary

In the Linux kernel, the following vulnerability has been resolved: proc: protect ptrace_may_access() with exec_update_lock (FD links) proc_pid_get_link() and proc_pid_readlink() currently look up the task from the pid once, then do the ptrace access check on that task, then look up the task from the pid a second time to do the actual access. That's racy in several ways. To fix it, pass the task to the ->proc_get_link() handler, and instead of proc_fd_access_allowed(), introduce a new helper call_proc_get_link() that looks up and locks the task, does the access check, and calls ->proc_get_link().

Severity

No CVSS data available.

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/6253dfee5afba536b…
https://git.kernel.org/stable/c/65bf0d2b6e914f144…
https://git.kernel.org/stable/c/de497d7aa2fae453a…
https://git.kernel.org/stable/c/138c692d2b2d63d26…
https://git.kernel.org/stable/c/83b17872e3166c295…
https://git.kernel.org/stable/c/497c6bae516742859…
https://git.kernel.org/stable/c/dfd1894cb64cbd875…
https://git.kernel.org/stable/c/6255da28d4bb5349f…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 778c1144771f0064b6f51bee865cceb0d996f2f9 , < 6253dfee5afba536bb54fc6fe6c091c3758fafe1 (git) Affected: 778c1144771f0064b6f51bee865cceb0d996f2f9 , < 65bf0d2b6e914f1448d6a2fde193dcf60936a651 (git) Affected: 778c1144771f0064b6f51bee865cceb0d996f2f9 , < de497d7aa2fae453a7e7c8f7d3e8682e565e3aaf (git) Affected: 778c1144771f0064b6f51bee865cceb0d996f2f9 , < 138c692d2b2d63d26f2eb957d0e4fcc5d61f9ff2 (git) Affected: 778c1144771f0064b6f51bee865cceb0d996f2f9 , < 83b17872e3166c295c599279fc9562ac3840c638 (git) Affected: 778c1144771f0064b6f51bee865cceb0d996f2f9 , < 497c6bae5167428596575f20af6613ff5671f383 (git) Affected: 778c1144771f0064b6f51bee865cceb0d996f2f9 , < dfd1894cb64cbd8758b461ed713800fe73db4f82 (git) Affected: 778c1144771f0064b6f51bee865cceb0d996f2f9 , < 6255da28d4bb5349fe18e84cb043ccd394eba75d (git)
Linux	Linux	Affected: 2.6.18 Unaffected: 0 , < 2.6.18 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix)

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JSON

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      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nproc: protect ptrace_may_access() with exec_update_lock (FD links)\n\nproc_pid_get_link() and proc_pid_readlink() currently look up the task from\nthe pid once, then do the ptrace access check on that task, then look up\nthe task from the pid a second time to do the actual access.\nThat\u0027s racy in several ways.\n\nTo fix it, pass the task to the -\u003eproc_get_link() handler, and instead of\nproc_fd_access_allowed(), introduce a new helper call_proc_get_link() that\nlooks up and locks the task, does the access check, and calls\n-\u003eproc_get_link()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-25T08:50:26.869Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
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          "url": "https://git.kernel.org/stable/c/6255da28d4bb5349fe18e84cb043ccd394eba75d"
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    "datePublished": "2026-07-25T08:50:26.869Z",
    "dateReserved": "2026-07-19T15:36:31.784Z",
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      "date": "2026-07-26",
      "epss": "0.00177",
      "percentile": "0.07469"
    },
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calls\\n-\u003eproc_get_link().\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/proc/base.c\",\"fs/proc/fd.c\",\"fs/proc/internal.h\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"778c1144771f0064b6f51bee865cceb0d996f2f9\",\"lessThan\":\"6253dfee5afba536bb54fc6fe6c091c3758fafe1\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"778c1144771f0064b6f51bee865cceb0d996f2f9\",\"lessThan\":\"65bf0d2b6e914f1448d6a2fde193dcf60936a651\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"778c1144771f0064b6f51bee865cceb0d996f2f9\",\"lessThan\":\"de497d7aa2fae453a7e7c8f7d3e8682e565e3aaf\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"778c1144771f0064b6f51bee865cceb0d996f2f9\",\"lessThan\":\"138c692d2b2d63d26f2eb957d0e4fcc5d61f9ff2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"778c1144771f0064b6f51bee865cceb0d996f2f9\",\"lessThan\":\"83b17872e3166c295c599279fc9562ac3840c638\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"778c1144771f0064b6f51bee865cceb0d996f2f9\",\"lessThan\":\"497c6bae5167428596575f20af6613ff5671f383\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"778c1144771f0064b6f51bee865cceb0d996f2f9\",\"lessThan\":\"dfd1894cb64cbd8758b461ed713800fe73db4f82\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"778c1144771f0064b6f51bee865cceb0d996f2f9\",\"lessThan\":\"6255da28d4bb5349fe18e84cb043ccd394eba75d\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/proc/base.c\",\"fs/proc/fd.c\",\"fs/proc/internal.h\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.18\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.18\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.261\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.212\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.178\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.145\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.97\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.40\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.4\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/138c692d2b2d63d26f2eb957d0e4fcc5d61f9ff2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/497c6bae5167428596575f20af6613ff5671f383\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6253dfee5afba536bb54fc6fe6c091c3758fafe1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6255da28d4bb5349fe18e84cb043ccd394eba75d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/65bf0d2b6e914f1448d6a2fde193dcf60936a651\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/83b17872e3166c295c599279fc9562ac3840c638\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/de497d7aa2fae453a7e7c8f7d3e8682e565e3aaf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dfd1894cb64cbd8758b461ed713800fe73db4f82\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-07-25T16:00:40Z",
      "cve": "CVE-2026-64375",
      "id": "CVE-2026-64375",
      "initial_release_date": "2026-07-25T16:00:40Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64375",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64375.json",
      "version": "2"
    }
  }
}

GHSA-4H3Q-CF72-R99P

Vulnerability from github – Published: 2026-07-25 12:31 – Updated: 2026-07-25 12:31

Details

In the Linux kernel, the following vulnerability has been resolved:

proc: protect ptrace_may_access() with exec_update_lock (FD links)

proc_pid_get_link() and proc_pid_readlink() currently look up the task from the pid once, then do the ptrace access check on that task, then look up the task from the pid a second time to do the actual access. That's racy in several ways.

To fix it, pass the task to the ->proc_get_link() handler, and instead of proc_fd_access_allowed(), introduce a new helper call_proc_get_link() that looks up and locks the task, does the access check, and calls ->proc_get_link().

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-64375"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-25T10:17:20Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nproc: protect ptrace_may_access() with exec_update_lock (FD links)\n\nproc_pid_get_link() and proc_pid_readlink() currently look up the task from\nthe pid once, then do the ptrace access check on that task, then look up\nthe task from the pid a second time to do the actual access.\nThat\u0027s racy in several ways.\n\nTo fix it, pass the task to the -\u003eproc_get_link() handler, and instead of\nproc_fd_access_allowed(), introduce a new helper call_proc_get_link() that\nlooks up and locks the task, does the access check, and calls\n-\u003eproc_get_link().",
  "id": "GHSA-4h3q-cf72-r99p",
  "modified": "2026-07-25T12:31:33Z",
  "published": "2026-07-25T12:31:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64375"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/138c692d2b2d63d26f2eb957d0e4fcc5d61f9ff2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/497c6bae5167428596575f20af6613ff5671f383"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6253dfee5afba536bb54fc6fe6c091c3758fafe1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6255da28d4bb5349fe18e84cb043ccd394eba75d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/65bf0d2b6e914f1448d6a2fde193dcf60936a651"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/83b17872e3166c295c599279fc9562ac3840c638"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/de497d7aa2fae453a7e7c8f7d3e8682e565e3aaf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dfd1894cb64cbd8758b461ed713800fe73db4f82"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2026-64375 (GCVE-0-2026-64375)

GHSA-4H3Q-CF72-R99P

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Nomenclature