7.8

CVE-2022-49168: btrfs: do not clean up repair bio if submit fails

Analyzed
AliasesUBUNTU-CVE-2022-49168DEBIAN-CVE-2022-49168
Published 26-02-2025Last modified 05-08-2026

Vulnerability summary

CVE-2022-49168 is a high (CVSS 7.8) Use After Free vulnerability in linux. EPSS estimates a 0.33% chance of exploitation in the next 30 days, higher than 26% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.33%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 12 · Related 11
DLA-4475-1SUSE-SU-2025:01983-1USN-7654-1USN-7654-2USN-7654-3USN-7654-4

Timeline

  1. 26-02-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: btrfs: do not clean up repair bio if submit fails The submit helper will always run bio_endio() on the bio if it fails to submit, so cleaning up the bio just leads to a variety of use-after-free and NULL pointer dereference bugs because we race with the endio function that is cleaning up the bio. Instead just return BLK_STS_OK as the repair function has to continue to process the rest of the pages, and the endio for the repair bio will do the appropriate cleanup for the page that it was given.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.33%

Chance of exploitation in the next 30 days

Percentile

26%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.33% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu116 products
  • linuxAll versions (No fix recorded) | < 5.15.0-144.157
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1088.95
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 6c387ab20db15f2bd448f7c508e2638101b16ea1, < e7e1d15d2bd8c373cf621614ddd17971a2132713 | ≥ 6c387ab20db15f2bd448f7c508e2638101b16ea1, < 7170875083254b51fcc5d67f96640977083f481e | ≥ 6c387ab20db15f2bd448f7c508e2638101b16ea1, < e76c78c48902dae6fa612749f59162bca0a79e0b | ≥ 6c387ab20db15f2bd448f7c508e2638101b16ea1, < d1cb11fb45ebbb1e7dfe5e9038b32ea72c184b14 | ≥ 6c387ab20db15f2bd448f7c508e2638101b16ea1, < 8cbc3001a3264d998d6b6db3e23f935c158abd4d | 3.18
  • linux_kernel< 5.10.248 | ≥ 5.11, < 5.15.184 | ≥ 5.16, < 5.16.19 | ≥ 5.17, < 5.17.2
Debian1 product
  • linux< 5.17.3-1

3 vendors · 119 products

References

20 links
Show all 20 references