btrfs: fix extent map use-after-free when handling missing device in read_one_chunk
Summary
| CVE | CVE-2022-50300 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2025-09-15 15:15:41 UTC |
| Updated | 2026-08-04 10:18:10 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: btrfs: fix extent map use-after-free when handling missing device in read_one_chunk Store the error code before freeing the extent_map. Though it's reference counted structure, in that function it's the first and last allocation so this would lead to a potential use-after-free. The error can happen eg. when chunk is stored on a missing device and the degraded mount option is missing. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=216721 |
Risk And Classification
Primary CVSS: v3.1 7.8 HIGH from [email protected]
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Problem Types: CWE-416
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | Secondary | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| 3.1 | CNA | DECLARED | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Linux | Linux Kernel | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected adfb69af7d8cb6a3958f75aad1ef4bc96891d116 b8e7ed42bc3ca0d0e4191ee394d34962d3624c22 git | Not specified |
| CNA | Linux | Linux | affected adfb69af7d8cb6a3958f75aad1ef4bc96891d116 fce3713197ebba239e1c7e02174ed216ea1ee014 git | Not specified |
| CNA | Linux | Linux | affected adfb69af7d8cb6a3958f75aad1ef4bc96891d116 169a4cf46882974d4db6d85eb623ec898e51bbc0 git | Not specified |
| CNA | Linux | Linux | affected adfb69af7d8cb6a3958f75aad1ef4bc96891d116 1742e1c90c3da344f3bb9b1f1309b3f47482756a git | Not specified |
| CNA | Linux | Linux | affected 4.15 | Not specified |
| CNA | Linux | Linux | unaffected 4.15 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.87 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.0.18 6.0.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.4 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.2 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/1742e1c90c3da344f3bb9b1f1309b3f47482756a | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/169a4cf46882974d4db6d85eb623ec898e51bbc0 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/b8e7ed42bc3ca0d0e4191ee394d34962d3624c22 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/fce3713197ebba239e1c7e02174ed216ea1ee014 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.