CVE-2022-50300

HIGH EPSS 4.4%
Published Sep 15, 20259mo ago · Modified Jun 17, 20262w ago
7.8 CVSS 3.1
High
Find Similar
Published Sep 15, 2025 9mo ago
Last Modified Jun 17, 2026 2w ago

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

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
4.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 3

VendorProductVersionRange
linuxlinux_kernel*≥4.15  –  <5.15.87
linuxlinux_kernel*≥5.16  –  <6.0.18
linuxlinux_kernel*≥6.1  –  <6.1.4

References 4

  • git.kernel.org https://git.kernel.org/stable/c/169a4cf46882974d4db6d85eb623ec898e51bbc0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1742e1c90c3da344f3bb9b1f1309b3f47482756a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b8e7ed42bc3ca0d0e4191ee394d34962d3624c22
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fce3713197ebba239e1c7e02174ed216ea1ee014
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/169a4cf46882974d4db6d85eb623ec898e51bbc0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1742e1c90c3da344f3bb9b1f1309b3f47482756a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b8e7ed42bc3ca0d0e4191ee394d34962d3624c22
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fce3713197ebba239e1c7e02174ed216ea1ee014
    Patch