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
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"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-01T01:25:54Z",
      "cve": "CVE-2022-49914",
      "id": "CVE-2022-49914",
      "initial_release_date": "2025-05-07T02:19:03Z",
      "product_status:known_affected": "664",
      "product_status:known_not_affected": "194",
      "product_status:recommended": "37",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-49914",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-49914.json",
      "version": "28"
    }
  }
}



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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

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.



Related by attack behaviour

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.