FKIE_CVE-2023-53867

Vulnerability from fkie_nvd - Published: 2025-12-24 11:15 - Updated: 2026-06-17 06:46
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: ceph: fix potential use-after-free bug when trimming caps When trimming the caps and just after the 'session->s_cap_lock' is released in ceph_iterate_session_caps() the cap maybe removed by another thread, and when using the stale cap memory in the callbacks it will trigger use-after-free crash. We need to check the existence of the cap just after the 'ci->i_ceph_lock' being acquired. And do nothing if it's already removed.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2b2515b8095cf2149bef44383a99d5b5677f1831
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/448875a73e16ba7d81dec9274ce9d33a12d092fb
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/aaf67de78807c59c35bafb5003d4fb457c764800
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ae6e935618d99cdba11eab4714092e7e5f13cf7e
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/ceph/caps.c",
            "fs/ceph/debugfs.c",
            "fs/ceph/mds_client.c",
            "fs/ceph/mds_client.h",
            "fs/ceph/super.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2b2515b8095cf2149bef44383a99d5b5677f1831",
              "status": "affected",
              "version": "2f2dc053404febedc9c273452d9d518fb31fde72",
              "versionType": "git"
            },
            {
              "lessThan": "448875a73e16ba7d81dec9274ce9d33a12d092fb",
              "status": "affected",
              "version": "2f2dc053404febedc9c273452d9d518fb31fde72",
              "versionType": "git"
            },
            {
              "lessThan": "ae6e935618d99cdba11eab4714092e7e5f13cf7e",
              "status": "affected",
              "version": "2f2dc053404febedc9c273452d9d518fb31fde72",
              "versionType": "git"
            },
            {
              "lessThan": "aaf67de78807c59c35bafb5003d4fb457c764800",
              "status": "affected",
              "version": "2f2dc053404febedc9c273452d9d518fb31fde72",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/ceph/caps.c",
            "fs/ceph/debugfs.c",
            "fs/ceph/mds_client.c",
            "fs/ceph/mds_client.h",
            "fs/ceph/super.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.34"
            },
            {
              "lessThan": "2.6.34",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.28",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.2.*",
              "status": "unaffected",
              "version": "6.2.15",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.3.*",
              "status": "unaffected",
              "version": "6.3.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.4",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nceph: fix potential use-after-free bug when trimming caps\n\nWhen trimming the caps and just after the \u0027session-\u003es_cap_lock\u0027 is\nreleased in ceph_iterate_session_caps() the cap maybe removed by\nanother thread, and when using the stale cap memory in the callbacks\nit will trigger use-after-free crash.\n\nWe need to check the existence of the cap just after the \u0027ci-\u003ei_ceph_lock\u0027\nbeing acquired. And do nothing if it\u0027s already removed."
    }
  ],
  "id": "CVE-2023-53867",
  "lastModified": "2026-06-17T06:46:12.953",
  "metrics": {},
  "published": "2025-12-24T11:15:51.387",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2b2515b8095cf2149bef44383a99d5b5677f1831"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/448875a73e16ba7d81dec9274ce9d33a12d092fb"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/aaf67de78807c59c35bafb5003d4fb457c764800"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ae6e935618d99cdba11eab4714092e7e5f13cf7e"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Deferred"
}



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