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

Vulnerability from cvelistv5 – Published: 2026-08-15 05:57 – Updated: 2026-08-17 05:44
VLAI
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
References
Impacted products
Vendor Product Version CPE status
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)
guessed Create a notification for this product.
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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          "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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              "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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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "dateReserved": "2026-08-09T03:40:39.932Z",
    "dateUpdated": "2026-08-17T05:44:26.306Z",
    "state": "PUBLISHED"
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This preserves the current audit handling while preventing the\\nsubset helper from dereferencing an invalid label.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"security/apparmor/domain.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"e00b02bb6ac2a1893227ce8014b649028d6425d2\",\"lessThan\":\"a29f06db44b4c94597ded58f639eed3e21781ac3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e00b02bb6ac2a1893227ce8014b649028d6425d2\",\"lessThan\":\"cfc224866530a6842b6c2d2d30ef6a9b0e64bb9c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e00b02bb6ac2a1893227ce8014b649028d6425d2\",\"lessThan\":\"31cb109db5e6322ed22304fd5c0dedbaa438d6d3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e00b02bb6ac2a1893227ce8014b649028d6425d2\",\"lessThan\":\"b7c45c05a396a017c49ac7949de240a0dfc0ac4e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e00b02bb6ac2a1893227ce8014b649028d6425d2\",\"lessThan\":\"d84bb195d208adbf77f012ca2a96e11163f6def1\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e00b02bb6ac2a1893227ce8014b649028d6425d2\",\"lessThan\":\"d82160132345688a09cbaa648cfdd16bb32e8ea2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e00b02bb6ac2a1893227ce8014b649028d6425d2\",\"lessThan\":\"ec926b2a351eeeb31e6c9aee02e0c32f94b5588f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e00b02bb6ac2a1893227ce8014b649028d6425d2\",\"lessThan\":\"a58cafd38b46fb1a2220e2fbbcfe291ea75fa147\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"security/apparmor/domain.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.13\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.13\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.261\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.212\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.178\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.145\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.97\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.40\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.5\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H\",\"baseScore\":7.1,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.2}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/31cb109db5e6322ed22304fd5c0dedbaa438d6d3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a29f06db44b4c94597ded58f639eed3e21781ac3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a58cafd38b46fb1a2220e2fbbcfe291ea75fa147\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b7c45c05a396a017c49ac7949de240a0dfc0ac4e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cfc224866530a6842b6c2d2d30ef6a9b0e64bb9c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d82160132345688a09cbaa648cfdd16bb32e8ea2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d84bb195d208adbf77f012ca2a96e11163f6def1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ec926b2a351eeeb31e6c9aee02e0c32f94b5588f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-18T14:33:37+00:00",
      "cve": "CVE-2026-72460",
      "id": "CVE-2026-72460",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: apparmor: check label build before no_new_privs test",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72460.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.