CVE-2022-49914 (GCVE-0-2022-49914)

Vulnerability from cvelistv5 – Published: 2025-05-01 14:10 – Updated: 2026-05-11 19:09
VLAI
Title
btrfs: fix inode list leak during backref walking at resolve_indirect_refs()
Summary
In the Linux kernel, the following vulnerability has been resolved: btrfs: fix inode list leak during backref walking at resolve_indirect_refs() During backref walking, at resolve_indirect_refs(), if we get an error we jump to the 'out' label and call ulist_free() on the 'parents' ulist, which frees all the elements in the ulist - however that does not free any inode lists that may be attached to elements, through the 'aux' field of a ulist node, so we end up leaking lists if we have any attached to the unodes. Fix this by calling free_leaf_list() instead of ulist_free() when we exit from resolve_indirect_refs(). The static function free_leaf_list() is moved up for this to be possible and it's slightly simplified by removing unnecessary code.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6843 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 3301958b7c1dae8f0f5ded63aa881e0b71e78464 , < b1dc9019bb5f89abae85645de1a2dd4830c1f8e9 (git)
Affected: 3301958b7c1dae8f0f5ded63aa881e0b71e78464 , < cded2c89774b99b67c98147ae103ea878c92a206 (git)
Affected: 3301958b7c1dae8f0f5ded63aa881e0b71e78464 , < 2c0329406bb28109c07c6e23e5e3e0fa618a95d7 (git)
Affected: 3301958b7c1dae8f0f5ded63aa881e0b71e78464 , < a52e24c7fcc3c5ce3588a14e3663c00868d36623 (git)
Affected: 3301958b7c1dae8f0f5ded63aa881e0b71e78464 , < 6ba3479f9e96b9ad460c7e77abc26dd16e5dec4f (git)
Affected: 3301958b7c1dae8f0f5ded63aa881e0b71e78464 , < 396515db923ad5cbeb179d6b88927870b4cbebb7 (git)
Affected: 3301958b7c1dae8f0f5ded63aa881e0b71e78464 , < 5614dc3a47e3310fbc77ea3b67eaadd1c6417bf1 (git)
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Linux Linux Affected: 3.5
Unaffected: 0 , < 3.5 (semver)
Unaffected: 4.14.299 , ≤ 4.14.* (semver)
Unaffected: 4.19.265 , ≤ 4.19.* (semver)
Unaffected: 5.4.224 , ≤ 5.4.* (semver)
Unaffected: 5.10.154 , ≤ 5.10.* (semver)
Unaffected: 5.15.78 , ≤ 5.15.* (semver)
Unaffected: 6.0.8 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
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          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-401"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-29T21:30:13+00:00",
      "cve": "CVE-2022-49914",
      "id": "CVE-2022-49914",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_affected": "42",
      "product_status:known_not_affected": "232",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: btrfs: fix inode list leak during backref walking at resolve_indirect_refs()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49914.json",
      "version": "3"
    }
  }
}



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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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