7.8

CVE-2022-49413: bfq: Update cgroup information before merging bio

Analyzed
AliasesUBUNTU-CVE-2022-49413DEBIAN-CVE-2022-49413
Published 26-02-2025Last modified 05-08-2026

Vulnerability summary

CVE-2022-49413 is a high (CVSS 7.8) Use After Free vulnerability in linux. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 21.5% 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
0.29%
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 8 · Related 7
RHSA-2022:8267SUSE-SU-2025:1027-1SUSE-SU-2025:1176-1SUSE-SU-2025:1183-1SUSE-SU-2025:1194-1SUSE-SU-2025:1241-1

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: bfq: Update cgroup information before merging bio When the process is migrated to a different cgroup (or in case of writeback just starts submitting bios associated with a different cgroup) bfq_merge_bio() can operate with stale cgroup information in bic. Thus the bio can be merged to a request from a different cgroup or it can result in merging of bfqqs for different cgroups or bfqqs of already dead cgroups and causing possible use-after-free issues. Fix the problem by updating cgroup information in bfq_merge_bio().

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.29%

Chance of exploitation in the next 30 days

Percentile

22%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.29% 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.

Ubuntu110 products
  • linuxAll versions (No fix recorded) | < 5.4.0-126.142 | < 5.15.0-47.51
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1085.92 | < 5.15.0-1019.23
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ e21b7a0b988772e82e7147e1c659a5afe2ae003c, < da9f3025d595956410ceaab2bea01980d7775948 | ≥ e21b7a0b988772e82e7147e1c659a5afe2ae003c, < b06691af08b41dfd81052a3362514d9827b44bb1 | ≥ e21b7a0b988772e82e7147e1c659a5afe2ae003c, < e8821f45612f2e6d9adb9c6ba0fb4184f57692aa | ≥ e21b7a0b988772e82e7147e1c659a5afe2ae003c, < d9165200c5627a2cf4408eefabdf0058bdf95e1a | ≥ e21b7a0b988772e82e7147e1c659a5afe2ae003c, < 2a1077f17169a6059992a0bbdb330e0abad1e6d9 | ≥ e21b7a0b988772e82e7147e1c659a5afe2ae003c, < ea591cd4eb270393810e7be01feb8fde6a34fbbe | 4.12
  • linux_kernel≥ 4.12, < 5.4.198 | ≥ 5.5, < 5.10.121 | ≥ 5.11, < 5.15.46 | ≥ 5.16, < 5.17.14 | ≥ 5.18, < 5.18.3
Debian1 product
  • linux< 5.18.5-1

3 vendors · 113 products

References

10 links