CVE-2022-49914
btrfs: fix inode list leak during backref walking at resolve_indirect_refs()
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
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.
Timeline
ID reserved
By Linux
Published
- 13 months later
· 13 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.20% · top 90% of all CVEs (7 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
- affected 3301958b7c1dae8f0f5ded63aa881e0b71e78464 – < b1dc9019bb5f89abae85645de1a2dd4830c1f8e9
- affected 3301958b7c1dae8f0f5ded63aa881e0b71e78464 – < cded2c89774b99b67c98147ae103ea878c92a206
- affected 3301958b7c1dae8f0f5ded63aa881e0b71e78464 – < 2c0329406bb28109c07c6e23e5e3e0fa618a95d7
- affected 3301958b7c1dae8f0f5ded63aa881e0b71e78464 – < a52e24c7fcc3c5ce3588a14e3663c00868d36623
- affected 3301958b7c1dae8f0f5ded63aa881e0b71e78464 – < 6ba3479f9e96b9ad460c7e77abc26dd16e5dec4f
- affected 3301958b7c1dae8f0f5ded63aa881e0b71e78464 – < 396515db923ad5cbeb179d6b88927870b4cbebb7
- affected 3301958b7c1dae8f0f5ded63aa881e0b71e78464 – < 5614dc3a47e3310fbc77ea3b67eaadd1c6417bf1
- affected 3.5
- unaffected < 3.5
- unaffected 4.14.299 – ≤ 4.14.*
- unaffected 4.19.265 – ≤ 4.19.*
- unaffected 5.4.224 – ≤ 5.4.*
- unaffected 5.10.154 – ≤ 5.10.*
- unaffected 5.15.78 – ≤ 5.15.*
- unaffected 6.0.8 – ≤ 6.0.*
- unaffected 6.1 – ≤ *
References (7)
- https://git.kernel.org/stable/c/b1dc9019bb5f89abae85645de1a2dd4830c1f8e9 (opens in a new tab)
- https://git.kernel.org/stable/c/cded2c89774b99b67c98147ae103ea878c92a206 (opens in a new tab)
- https://git.kernel.org/stable/c/2c0329406bb28109c07c6e23e5e3e0fa618a95d7 (opens in a new tab)
- https://git.kernel.org/stable/c/a52e24c7fcc3c5ce3588a14e3663c00868d36623 (opens in a new tab)
- https://git.kernel.org/stable/c/6ba3479f9e96b9ad460c7e77abc26dd16e5dec4f (opens in a new tab)
- https://git.kernel.org/stable/c/396515db923ad5cbeb179d6b88927870b4cbebb7 (opens in a new tab)
- https://git.kernel.org/stable/c/5614dc3a47e3310fbc77ea3b67eaadd1c6417bf1 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-49914)Record last updated .