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GHSA-H42Q-RF58-CW35

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-17 06:33

Details

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

apparmor: check label build before no_new_privs test

aa_change_profile() builds a replacement label with fn_label_build_in_scope() before the no_new_privs subset check. The build helper can fail and return NULL or an ERR_PTR, but the result was passed to aa_label_is_unconfined_subset() before the existing IS_ERR_OR_NULL() check.

Reuse the existing target-label build failure handling immediately after the build. This preserves the current audit handling while preventing the subset helper from dereferencing an invalid label.

Severity

7.1 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-72460"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:22:19Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: check label build before no_new_privs test\n\naa_change_profile() builds a replacement label with\nfn_label_build_in_scope() before the no_new_privs subset check. The build\nhelper can fail and return NULL or an ERR_PTR, but the result was passed\nto aa_label_is_unconfined_subset() before the existing IS_ERR_OR_NULL()\ncheck.\n\nReuse the existing target-label build failure handling immediately after\nthe build. This preserves the current audit handling while preventing the\nsubset helper from dereferencing an invalid label.",
  "id": "GHSA-h42q-rf58-cw35",
  "modified": "2026-08-17T06:33:31Z",
  "published": "2026-08-15T06:32:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72460"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/31cb109db5e6322ed22304fd5c0dedbaa438d6d3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a29f06db44b4c94597ded58f639eed3e21781ac3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a58cafd38b46fb1a2220e2fbbcfe291ea75fa147"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b7c45c05a396a017c49ac7949de240a0dfc0ac4e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cfc224866530a6842b6c2d2d30ef6a9b0e64bb9c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d82160132345688a09cbaa648cfdd16bb32e8ea2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d84bb195d208adbf77f012ca2a96e11163f6def1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ec926b2a351eeeb31e6c9aee02e0c32f94b5588f"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-72460 (GCVE-0-2026-72460)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:57 – Updated: 2026-08-17 05:44

Title

apparmor: check label build before no_new_privs test

Summary

In the Linux kernel, the following vulnerability has been resolved: apparmor: check label build before no_new_privs test aa_change_profile() builds a replacement label with fn_label_build_in_scope() before the no_new_privs subset check. The build helper can fail and return NULL or an ERR_PTR, but the result was passed to aa_label_is_unconfined_subset() before the existing IS_ERR_OR_NULL() check. Reuse the existing target-label build failure handling immediately after the build. This preserves the current audit handling while preventing the subset helper from dereferencing an invalid label.

Severity

7.1 (High)


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

Assigner

Linux mitre root Scorecard

References

8 references

URL	Tags
https://git.kernel.org/stable/c/a29f06db44b4c9459…
https://git.kernel.org/stable/c/cfc224866530a6842…
https://git.kernel.org/stable/c/31cb109db5e6322ed…
https://git.kernel.org/stable/c/b7c45c05a396a017c…
https://git.kernel.org/stable/c/d84bb195d208adbf7…
https://git.kernel.org/stable/c/d82160132345688a0…
https://git.kernel.org/stable/c/ec926b2a351eeeb31…
https://git.kernel.org/stable/c/a58cafd38b46fb1a2…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: e00b02bb6ac2a1893227ce8014b649028d6425d2 , < a29f06db44b4c94597ded58f639eed3e21781ac3 (git) Affected: e00b02bb6ac2a1893227ce8014b649028d6425d2 , < cfc224866530a6842b6c2d2d30ef6a9b0e64bb9c (git) Affected: e00b02bb6ac2a1893227ce8014b649028d6425d2 , < 31cb109db5e6322ed22304fd5c0dedbaa438d6d3 (git) Affected: e00b02bb6ac2a1893227ce8014b649028d6425d2 , < b7c45c05a396a017c49ac7949de240a0dfc0ac4e (git) Affected: e00b02bb6ac2a1893227ce8014b649028d6425d2 , < d84bb195d208adbf77f012ca2a96e11163f6def1 (git) Affected: e00b02bb6ac2a1893227ce8014b649028d6425d2 , < d82160132345688a09cbaa648cfdd16bb32e8ea2 (git) Affected: e00b02bb6ac2a1893227ce8014b649028d6425d2 , < ec926b2a351eeeb31e6c9aee02e0c32f94b5588f (git) Affected: e00b02bb6ac2a1893227ce8014b649028d6425d2 , < a58cafd38b46fb1a2220e2fbbcfe291ea75fa147 (git)
Linux	Linux	Affected: 4.13 Unaffected: 0 , < 4.13 (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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{
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    "cna": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "security/apparmor/domain.c"
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              "status": "affected",
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
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              "versionType": "semver"
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            {
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              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
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            {
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              "status": "unaffected",
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              "versionType": "semver"
            },
            {
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              "versionType": "semver"
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            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
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            {
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              "status": "unaffected",
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              "versionType": "semver"
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              "versionType": "semver"
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              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: check label build before no_new_privs test\n\naa_change_profile() builds a replacement label with\nfn_label_build_in_scope() before the no_new_privs subset check. The build\nhelper can fail and return NULL or an ERR_PTR, but the result was passed\nto aa_label_is_unconfined_subset() before the existing IS_ERR_OR_NULL()\ncheck.\n\nReuse the existing target-label build failure handling immediately after\nthe build. This preserves the current audit handling while preventing the\nsubset helper from dereferencing an invalid label."
        }
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
            "version": "3.1"
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            {
              "lang": "en",
              "value": "AV:L - The flaw is reached only through a local write to /proc/self/attr/current or /proc/self/attr/exec (changeprofile/exec), which flows through proc_pid_attr_write and the AppArmor setprocattr hook into aa_change_profile(); there is no network, adjacent-radio, or physical-device entry point.\nAC:L - Once a confined task with policy-granted changeprofile and PR_SET_NO_NEW_PRIVS calls the interface, fn_label_build_in_scope() failure (e.g., GFP_KERNEL ENOMEM from memory pressure) is reliably attacker-influenced and immediately triggers the invalid dereference without races or victim-dependent timing.\nPR:L - Exploitation requires a local unprivileged process confined by AppArmor whose policy permits changeprofile/onexec to the requested target; prctl(PR_SET_NO_NEW_PRIVS) is self-settable and does not require real root or init-namespace capabilities.\nUI:N - The attacker triggers the bug by writing to their own process attribute file; no separate victim action such as opening a file, mounting a filesystem, or clicking a link is required.\nS:U - The vulnerable AppArmor kernel code and the resulting kernel oops/panic affect the same OS security authority; this is not a VM escape, IOMMU bypass, or cross-authority sandbox breakout as defined by CVSS scope.\nC:H - aa_label_is_unconfined_subset() dereferences the failed label pointer (NULL or ERR_PTR) to read aa_label fields such as size/vec; ERR_PTR values are non-NULL kernel-range addresses, so the fault path includes an invalid kernel-memory read that can leak data before oops under worst-case layout.\nI:N - The bug performs invalid reads through a bad label pointer and does not write memory, corrupt adjacent objects, or complete an unauthorized aa_replace_current_label(); failed builds are still rejected later, so integrity impact is limited to the read-side fault rather than modification or code execution.\nA:H - Dereferencing NULL or ERR_PTR labels in aa_label_is_unconfined_subset() causes a kernel BUG/oops/panic, yielding host-wide denial of service on AppArmor-enabled systems and repeatable crashes from the same procattr write."
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        "dateUpdated": "2026-08-17T05:44:26.306Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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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.

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-H42Q-RF58-CW35

CVE-2026-72460 (GCVE-0-2026-72460)

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