Vulnerability-Lookup

FKIE_CVE-2026-23269

Vulnerability from fkie_nvd - Published: 2026-03-18 18:16 - Updated: 2026-03-23 14:16

Severity ?

Summary

In the Linux kernel, the following vulnerability has been resolved: apparmor: validate DFA start states are in bounds in unpack_pdb Start states are read from untrusted data and used as indexes into the DFA state tables. The aa_dfa_next() function call in unpack_pdb() will access dfa->tables[YYTD_ID_BASE][start], and if the start state exceeds the number of states in the DFA, this results in an out-of-bound read. ================================================================== BUG: KASAN: slab-out-of-bounds in aa_dfa_next+0x2a1/0x360 Read of size 4 at addr ffff88811956fb90 by task su/1097 ... Reject policies with out-of-bounds start states during unpacking to prevent the issue.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0baadb0eece2c4d939db10d3c323b4652ac79a58
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/15c3eb8916e7db01cb246d04a1fe6f0fdc065b0c
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3bb7db43e32190c973d4019037cedb7895920184
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9063d7e2615f4a7ab321de6b520e23d370e58816
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://www.qualys.com/2026/03/10/crack-armor.txt

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: validate DFA start states are in bounds in unpack_pdb\n\nStart states are read from untrusted data and used as indexes into the\nDFA state tables. The aa_dfa_next() function call in unpack_pdb() will\naccess dfa-\u003etables[YYTD_ID_BASE][start], and if the start state exceeds\nthe number of states in the DFA, this results in an out-of-bound read.\n\n==================================================================\n BUG: KASAN: slab-out-of-bounds in aa_dfa_next+0x2a1/0x360\n Read of size 4 at addr ffff88811956fb90 by task su/1097\n ...\n\nReject policies with out-of-bounds start states during unpacking\nto prevent the issue."
    }
  ],
  "id": "CVE-2026-23269",
  "lastModified": "2026-03-23T14:16:32.520",
  "metrics": {},
  "published": "2026-03-18T18:16:25.907",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0baadb0eece2c4d939db10d3c323b4652ac79a58"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/15c3eb8916e7db01cb246d04a1fe6f0fdc065b0c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3bb7db43e32190c973d4019037cedb7895920184"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9063d7e2615f4a7ab321de6b520e23d370e58816"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://www.qualys.com/2026/03/10/crack-armor.txt"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}

CVE-2026-23269 (GCVE-0-2026-23269)

Vulnerability from cvelistv5 – Published: 2026-03-18 17:54 – Updated: 2026-03-23 12:53

Title

apparmor: validate DFA start states are in bounds in unpack_pdb

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/15c3eb8916e7db01c…
	https://git.kernel.org/stable/c/0baadb0eece2c4d93…
	https://git.kernel.org/stable/c/3bb7db43e32190c97…
	https://git.kernel.org/stable/c/9063d7e2615f4a7ab…
	https://www.qualys.com/2026/03/10/crack-armor.txt

Impacted products

Vendor

Product

Version

Linux

Affected: ad5ff3db53c68c2f12936bc74ea5dfe0af943592 , < 15c3eb8916e7db01cb246d04a1fe6f0fdc065b0c (git)
Affected: ad5ff3db53c68c2f12936bc74ea5dfe0af943592 , < 0baadb0eece2c4d939db10d3c323b4652ac79a58 (git)
Affected: ad5ff3db53c68c2f12936bc74ea5dfe0af943592 , < 3bb7db43e32190c973d4019037cedb7895920184 (git)
Affected: ad5ff3db53c68c2f12936bc74ea5dfe0af943592 , < 9063d7e2615f4a7ab321de6b520e23d370e58816 (git)

Linux

Affected: 3.4
Unaffected: 0 , < 3.4 (semver)
Unaffected: 6.12.77 , ≤ 6.12.* (semver)
Unaffected: 6.18.18 , ≤ 6.18.* (semver)
Unaffected: 6.19.8 , ≤ 6.19.* (semver)
Unaffected: 7.0-rc4 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "security/apparmor/policy_unpack.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "15c3eb8916e7db01cb246d04a1fe6f0fdc065b0c",
              "status": "affected",
              "version": "ad5ff3db53c68c2f12936bc74ea5dfe0af943592",
              "versionType": "git"
            },
            {
              "lessThan": "0baadb0eece2c4d939db10d3c323b4652ac79a58",
              "status": "affected",
              "version": "ad5ff3db53c68c2f12936bc74ea5dfe0af943592",
              "versionType": "git"
            },
            {
              "lessThan": "3bb7db43e32190c973d4019037cedb7895920184",
              "status": "affected",
              "version": "ad5ff3db53c68c2f12936bc74ea5dfe0af943592",
              "versionType": "git"
            },
            {
              "lessThan": "9063d7e2615f4a7ab321de6b520e23d370e58816",
              "status": "affected",
              "version": "ad5ff3db53c68c2f12936bc74ea5dfe0af943592",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "security/apparmor/policy_unpack.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.4"
            },
            {
              "lessThan": "3.4",
              "status": "unaffected",
              "version": "0",
              "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-rc4",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.77",
                  "versionStartIncluding": "3.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.18",
                  "versionStartIncluding": "3.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.8",
                  "versionStartIncluding": "3.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0-rc4",
                  "versionStartIncluding": "3.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: validate DFA start states are in bounds in unpack_pdb\n\nStart states are read from untrusted data and used as indexes into the\nDFA state tables. The aa_dfa_next() function call in unpack_pdb() will\naccess dfa-\u003etables[YYTD_ID_BASE][start], and if the start state exceeds\nthe number of states in the DFA, this results in an out-of-bound read.\n\n==================================================================\n BUG: KASAN: slab-out-of-bounds in aa_dfa_next+0x2a1/0x360\n Read of size 4 at addr ffff88811956fb90 by task su/1097\n ...\n\nReject policies with out-of-bounds start states during unpacking\nto prevent the issue."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-23T12:53:04.804Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/15c3eb8916e7db01cb246d04a1fe6f0fdc065b0c"
        },
        {
          "url": "https://git.kernel.org/stable/c/0baadb0eece2c4d939db10d3c323b4652ac79a58"
        },
        {
          "url": "https://git.kernel.org/stable/c/3bb7db43e32190c973d4019037cedb7895920184"
        },
        {
          "url": "https://git.kernel.org/stable/c/9063d7e2615f4a7ab321de6b520e23d370e58816"
        },
        {
          "url": "https://www.qualys.com/2026/03/10/crack-armor.txt"
        }
      ],
      "title": "apparmor: validate DFA start states are in bounds in unpack_pdb",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23269",
    "datePublished": "2026-03-18T17:54:42.988Z",
    "dateReserved": "2026-01-13T15:37:45.991Z",
    "dateUpdated": "2026-03-23T12:53:04.804Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

FKIE_CVE-2026-23269

CVE-2026-23269 (GCVE-0-2026-23269)

Tags

Sightings

Nomenclature