CVE-2026-23410 (GCVE-0-2026-23410)
Vulnerability from cvelistv5
Published
2026-04-01 08:36
Modified
2026-04-18 08:58
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: apparmor: fix race on rawdata dereference There is a race condition that leads to a use-after-free situation: because the rawdata inodes are not refcounted, an attacker can start open()ing one of the rawdata files, and at the same time remove the last reference to this rawdata (by removing the corresponding profile, for example), which frees its struct aa_loaddata; as a result, when seq_rawdata_open() is reached, i_private is a dangling pointer and freed memory is accessed. The rawdata inodes weren't refcounted to avoid a circular refcount and were supposed to be held by the profile rawdata reference. However during profile removal there is a window where the vfs and profile destruction race, resulting in the use after free. Fix this by moving to a double refcount scheme. Where the profile refcount on rawdata is used to break the circular dependency. Allowing for freeing of the rawdata once all inode references to the rawdata are put.
References
Impacted products
Vendor Product Version
Linux Linux Version: 5d5182cae40115c03933989473288e54afb39c7c
Version: 5d5182cae40115c03933989473288e54afb39c7c
Version: 5d5182cae40115c03933989473288e54afb39c7c
Version: 5d5182cae40115c03933989473288e54afb39c7c
Version: 5d5182cae40115c03933989473288e54afb39c7c
Version: 5d5182cae40115c03933989473288e54afb39c7c
Version: 5d5182cae40115c03933989473288e54afb39c7c
Version: 5d5182cae40115c03933989473288e54afb39c7c
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "security/apparmor/apparmorfs.c",
            "security/apparmor/include/policy_unpack.h",
            "security/apparmor/policy.c",
            "security/apparmor/policy_unpack.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "3b8e77c7abab40e6de9ad9de730d77984a498840",
              "status": "affected",
              "version": "5d5182cae40115c03933989473288e54afb39c7c",
              "versionType": "git"
            },
            {
              "lessThan": "d9d8560b9b7932f8cffc4c068c14289220900f79",
              "status": "affected",
              "version": "5d5182cae40115c03933989473288e54afb39c7c",
              "versionType": "git"
            },
            {
              "lessThan": "6b6ba87579c7e7c669e0bec91823e7fb693bc5df",
              "status": "affected",
              "version": "5d5182cae40115c03933989473288e54afb39c7c",
              "versionType": "git"
            },
            {
              "lessThan": "6ef1f2926c41ab96952d9696d55a052f1b3a9418",
              "status": "affected",
              "version": "5d5182cae40115c03933989473288e54afb39c7c",
              "versionType": "git"
            },
            {
              "lessThan": "f9761add6d100962a23996cb68f3d6abdd4d1815",
              "status": "affected",
              "version": "5d5182cae40115c03933989473288e54afb39c7c",
              "versionType": "git"
            },
            {
              "lessThan": "af782cc8871e3683ddd5a3cd2f7df526599863a9",
              "status": "affected",
              "version": "5d5182cae40115c03933989473288e54afb39c7c",
              "versionType": "git"
            },
            {
              "lessThan": "763e838adc3c7ec5a7df2990ce84cad951e42721",
              "status": "affected",
              "version": "5d5182cae40115c03933989473288e54afb39c7c",
              "versionType": "git"
            },
            {
              "lessThan": "a0b7091c4de45a7325c8780e6934a894f92ac86b",
              "status": "affected",
              "version": "5d5182cae40115c03933989473288e54afb39c7c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "security/apparmor/apparmorfs.c",
            "security/apparmor/include/policy_unpack.h",
            "security/apparmor/policy.c",
            "security/apparmor/policy_unpack.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.13"
            },
            {
              "lessThan": "4.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.253",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.203",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.169",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.130",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.77",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.18",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.253",
                  "versionStartIncluding": "4.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.203",
                  "versionStartIncluding": "4.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.169",
                  "versionStartIncluding": "4.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.130",
                  "versionStartIncluding": "4.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.77",
                  "versionStartIncluding": "4.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.18",
                  "versionStartIncluding": "4.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.8",
                  "versionStartIncluding": "4.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "4.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: fix race on rawdata dereference\n\nThere is a race condition that leads to a use-after-free situation:\nbecause the rawdata inodes are not refcounted, an attacker can start\nopen()ing one of the rawdata files, and at the same time remove the\nlast reference to this rawdata (by removing the corresponding profile,\nfor example), which frees its struct aa_loaddata; as a result, when\nseq_rawdata_open() is reached, i_private is a dangling pointer and\nfreed memory is accessed.\n\nThe rawdata inodes weren\u0027t refcounted to avoid a circular refcount and\nwere supposed to be held by the profile rawdata reference.  However\nduring profile removal there is a window where the vfs and profile\ndestruction race, resulting in the use after free.\n\nFix this by moving to a double refcount scheme. Where the profile\nrefcount on rawdata is used to break the circular dependency. Allowing\nfor freeing of the rawdata once all inode references to the rawdata\nare put."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-18T08:58:45.958Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/3b8e77c7abab40e6de9ad9de730d77984a498840"
        },
        {
          "url": "https://git.kernel.org/stable/c/d9d8560b9b7932f8cffc4c068c14289220900f79"
        },
        {
          "url": "https://git.kernel.org/stable/c/6b6ba87579c7e7c669e0bec91823e7fb693bc5df"
        },
        {
          "url": "https://git.kernel.org/stable/c/6ef1f2926c41ab96952d9696d55a052f1b3a9418"
        },
        {
          "url": "https://git.kernel.org/stable/c/f9761add6d100962a23996cb68f3d6abdd4d1815"
        },
        {
          "url": "https://git.kernel.org/stable/c/af782cc8871e3683ddd5a3cd2f7df526599863a9"
        },
        {
          "url": "https://git.kernel.org/stable/c/763e838adc3c7ec5a7df2990ce84cad951e42721"
        },
        {
          "url": "https://git.kernel.org/stable/c/a0b7091c4de45a7325c8780e6934a894f92ac86b"
        }
      ],
      "title": "apparmor: fix race on rawdata dereference",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23410",
    "datePublished": "2026-04-01T08:36:39.202Z",
    "dateReserved": "2026-01-13T15:37:46.013Z",
    "dateUpdated": "2026-04-18T08:58:45.958Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.