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CVE-2022-50860 (GCVE-0-2022-50860)

Vulnerability from cvelistv5 – Published: 2025-12-30 12:15 – Updated: 2026-08-05 08:59
VLAI
Title
apparmor: Fix memleak in alloc_ns()
Summary
In the Linux kernel, the following vulnerability has been resolved: apparmor: Fix memleak in alloc_ns() After changes in commit a1bd627b46d1 ("apparmor: share profile name on replacement"), the hname member of struct aa_policy is not valid slab object, but a subset of that, it can not be freed by kfree_sensitive(), use aa_policy_destroy() to fix it.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: a1bd627b46d169268a0ee5960899fb5be960a317 , < 9a32aa87a25d800b2c6f47bc2749a7bfd9a486f3 (git)
Affected: a1bd627b46d169268a0ee5960899fb5be960a317 , < 5f509fa740b17307f0cba412485072f632d5af36 (git)
Affected: a1bd627b46d169268a0ee5960899fb5be960a317 , < 0250cf8d37bb5201a117177afd24dc73a1c81657 (git)
Affected: a1bd627b46d169268a0ee5960899fb5be960a317 , < 12695b4b76d437b9c0182a6f7dfb2248013a9daf (git)
Affected: a1bd627b46d169268a0ee5960899fb5be960a317 , < e9e6fa49dbab6d84c676666f3fe7d360497fd65b (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.13
Unaffected: 0 , < 4.13 (semver)
Unaffected: 5.10.163 , ≤ 5.10.* (semver)
Unaffected: 5.15.86 , ≤ 5.15.* (semver)
Unaffected: 6.0.16 , ≤ 6.0.* (semver)
Unaffected: 6.1.2 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "security/apparmor/policy_ns.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: Fix memleak in alloc_ns()\n\nAfter changes in commit a1bd627b46d1 (\"apparmor: share profile name on\nreplacement\"), the hname member of struct aa_policy is not valid slab\nobject, but a subset of that, it can not be freed by kfree_sensitive(),\nuse aa_policy_destroy() to fix it."
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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",
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          },
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              "value": "AV:L - Reachable only via local AppArmor policy interfaces\u2014mkdir on apparmorfs namespaces or write to .load/.replace\u2014which call alloc_ns through __aa_create_ns/aa_prepare_ns; not via network or adjacent packet paths.\nAC:L - An attacker who can create namespaces can induce GFP_KERNEL failure in alloc_unconfined (e.g. memory pressure/cgroup limits) after aa_policy_init succeeds; once on fail_unconfined the bad kfree_sensitive is deterministic with no race outside attacker control.\nPR:L - Namespace creation requires CAP_MAC_ADMIN via aa_may_manage_policy, but with default unprivileged_userns_apparmor_policy=1 this is obtainable in nested user/AppArmor namespaces (e.g. unprivileged containers), matching prior AppArmor policy-load scoring.\nUI:N - The attacker triggers ns creation and the allocation-failure path themselves through policy admin operations; no separate victim action is required.\nS:U - Impact is confined to host-kernel slab corruption in AppArmor under the same OS security authority, with no VM, IOMMU, or sandbox boundary crossed.\nC:H - kfree_sensitive on the interior hname pointer performs an out-of-bounds zero (ksize returns the full slab object size from a mid-object pointer) and an invalid free, yielding slab corruption that can be leveraged for arbitrary read primitives.\nI:H - The same path is an out-of-bounds write via memzero_explicit plus an invalid free of a non-object-start pointer, which corrupts SLUB freelist metadata and is a well-established route to arbitrary write and control-flow hijack.\nA:H - Invalid free and adjacent-object corruption reliably cause kernel oops/BUG/panic under freelist hardening or subsequent realloc use, which is Availability High under kernel CVSS guidance."
            }
          ]
        }
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      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:59:49.893Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/e9e6fa49dbab6d84c676666f3fe7d360497fd65b"
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      "title": "apparmor: Fix memleak in alloc_ns()",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50860",
    "datePublished": "2025-12-30T12:15:33.859Z",
    "dateReserved": "2025-12-30T12:06:07.135Z",
    "dateUpdated": "2026-08-05T08:59:49.893Z",
    "state": "PUBLISHED"
  },
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    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-08-21T11:43:31+00:00",
      "cve": "CVE-2022-50860",
      "id": "CVE-2022-50860",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel AppArmor: Denial of Service via memory leak",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50860.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T01:20:24Z",
      "cve": "CVE-2022-50860",
      "id": "CVE-2022-50860",
      "initial_release_date": "2025-12-31T00:31:05Z",
      "product_status:known_affected": "427",
      "product_status:known_not_affected": "359",
      "product_status:recommended": "196",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-50860",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-50860.json",
      "version": "24"
    }
  }
}



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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.


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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.