Vulnerability-Lookup

GHSA-M5RP-7QWW-6J53

Vulnerability from github – Published: 2026-08-28 09:31 – Updated: 2026-08-29 09:30

Details

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

apparmor: fix potential UAF in aa_replace_profiles

The function aa_replace_profiles was accessing udata->size after calling aa_put_loaddata(udata), causing a potential UAF.

Fixed this by saving the size to a local variable before dropping the reference.

Severity

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-80619"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-28T08:16:45Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: fix potential UAF in aa_replace_profiles\n\nThe function aa_replace_profiles was accessing udata-\u003esize after calling\naa_put_loaddata(udata), causing a potential UAF.\n\nFixed this by saving the size to a local variable before dropping the\nreference.",
  "id": "GHSA-m5rp-7qww-6j53",
  "modified": "2026-08-29T09:30:26Z",
  "published": "2026-08-28T09:31:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80619"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/57b1bd4486d56254bb8af1a8f3d4445bbe505290"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5cba148eae6e8550c2889f5c0f94d72bed864321"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7b42f95813dc9ceb6bda35afcf914630909a19f9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9d37dc6376e336dc4b4f39a7ad0d069aa70e9495"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9d8e47cbce7536f19c96e37d0685a042010187ee"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c0f3a3fda617beeec58708720304dd026a1a4dd7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c44de0880b7ccc15c70a6352b5e107677d32b061"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dd5f1202f45a2dbe2c7dd10093f5c6bb2d8ac5bb"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-80619 (GCVE-0-2026-80619)

Vulnerability from cvelistv5 – Published: 2026-08-28 06:48 – Updated: 2026-08-29 06:21

Title

apparmor: fix potential UAF in aa_replace_profiles

Summary

In the Linux kernel, the following vulnerability has been resolved: apparmor: fix potential UAF in aa_replace_profiles The function aa_replace_profiles was accessing udata->size after calling aa_put_loaddata(udata), causing a potential UAF. Fixed this by saving the size to a local variable before dropping the reference.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/9d8e47cbce7536f19…
https://git.kernel.org/stable/c/9d37dc6376e336dc4…
https://git.kernel.org/stable/c/c0f3a3fda617beeec…
https://git.kernel.org/stable/c/5cba148eae6e8550c…
https://git.kernel.org/stable/c/c44de0880b7ccc15c…
https://git.kernel.org/stable/c/57b1bd4486d56254b…
https://git.kernel.org/stable/c/dd5f1202f45a2dbe2…
https://git.kernel.org/stable/c/7b42f95813dc9ceb6…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 5ac8c355ae0013d82b3a07b49aebeadfce9b6e52 , < 9d8e47cbce7536f19c96e37d0685a042010187ee (git) Affected: 5ac8c355ae0013d82b3a07b49aebeadfce9b6e52 , < 9d37dc6376e336dc4b4f39a7ad0d069aa70e9495 (git) Affected: 5ac8c355ae0013d82b3a07b49aebeadfce9b6e52 , < c0f3a3fda617beeec58708720304dd026a1a4dd7 (git) Affected: 5ac8c355ae0013d82b3a07b49aebeadfce9b6e52 , < 5cba148eae6e8550c2889f5c0f94d72bed864321 (git) Affected: 5ac8c355ae0013d82b3a07b49aebeadfce9b6e52 , < c44de0880b7ccc15c70a6352b5e107677d32b061 (git) Affected: 5ac8c355ae0013d82b3a07b49aebeadfce9b6e52 , < 57b1bd4486d56254bb8af1a8f3d4445bbe505290 (git) Affected: 5ac8c355ae0013d82b3a07b49aebeadfce9b6e52 , < dd5f1202f45a2dbe2c7dd10093f5c6bb2d8ac5bb (git) Affected: 5ac8c355ae0013d82b3a07b49aebeadfce9b6e52 , < 7b42f95813dc9ceb6bda35afcf914630909a19f9 (git)
Linux	Linux	Affected: 4.11 Unaffected: 0 , < 4.11 (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: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "security/apparmor/policy.c"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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            {
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              "status": "affected",
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              "versionType": "git"
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            {
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              "versionType": "git"
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            },
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              "status": "unaffected",
              "version": "0",
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            {
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              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
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              "version": "6.6.145",
              "versionType": "semver"
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              "version": "7.1.5",
              "versionType": "semver"
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                {
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                {
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: fix potential UAF in aa_replace_profiles\n\nThe function aa_replace_profiles was accessing udata-\u003esize after calling\naa_put_loaddata(udata), causing a potential UAF.\n\nFixed this by saving the size to a local variable before dropping the\nreference."
        }
      ],
      "metrics": [
        {
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            "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"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The flaw is only reachable via local write() to AppArmor policy management interfaces (/sys/kernel/security/apparmor/.load or .replace, or namespace .load/.replace under apparmorfs), which invoke policy_update() -\u003e aa_replace_profiles(); there is no network or adjacent protocol path.\nAC:L - An attacker with policy-admin rights can trigger the bug by loading or replacing policy (including duplicate rawdata dedup paths) while concurrently removing/replacing profiles so aa_put_profile_loaddata() at the out label can drop the last pcount and schedule do_ploaddata_rmfs() before udata-\u003esize is read; the attacker controls both sides of this race.\nPR:L - aa_replace_profiles() is gated by aa_may_manage_policy(), which requires CAP_MAC_ADMIN and policy-view rights; with default unprivileged_userns_apparmor_policy=1, namespace UID 0 in an unprivileged user namespace can satisfy these without init-namespace root, matching prior AppArmor policy-load CVE scoring.\nUI:N - Exploitation requires only the attacker\u0027s own write of policy data to .load/.replace; no separate victim action, mount, or administrator interaction beyond the attacker\u0027s policy-management operation is needed.\nS:U - The UAF corrupts kernel AppArmor loaddata within the same OS security authority as the caller; it is standard kernel memory corruption/local privilege escalation, not a VM escape, IOMMU bypass, or cross-authority sandbox breakout.\nC:H - Reading udata-\u003esize after aa_put_profile_loaddata() is a use-after-free on struct aa_loaddata; freed heap objects can be reallocated and the size field read gives attacker-influenced kernel heap disclosure primitives per kernel CVSS UAF guidance.\nI:H - UAF on aa_loaddata enables heap grooming and corruption of adjacent kernel objects through controlled policy load/free timing, providing a well-established path to arbitrary kernel writes and local privilege escalation beyond the initial policy-admin capability.\nA:H - When the last profile reference is dropped at cleanup, the deferred free can run before the post-put size read, causing refcount corruption, kernel oops/BUG, or panic; UAF bugs are scored Availability High even when full exploitation is not attempted."
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        }
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        "dateUpdated": "2026-08-29T06:21:26.537Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80619",
    "datePublished": "2026-08-28T06:48:38.702Z",
    "dateReserved": "2026-08-26T14:34:25.774Z",
    "dateUpdated": "2026-08-29T06:21:26.537Z",
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}

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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

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GHSA-M5RP-7QWW-6J53

CVE-2026-80619 (GCVE-0-2026-80619)

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Sightings

Nomenclature