7.8

CVE-2022-49411: bfq: Make sure bfqg for which we are queueing requests is online

Analyzed
AliasesUBUNTU-CVE-2022-49411DEBIAN-CVE-2022-49411
Published 26-02-2025Last modified 05-08-2026

Vulnerability summary

CVE-2022-49411 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-2025:01600-1SUSE-SU-2025:1027-1SUSE-SU-2025:1176-1SUSE-SU-2025:1183-1SUSE-SU-2025:1194-1

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: Make sure bfqg for which we are queueing requests is online Bios queued into BFQ IO scheduler can be associated with a cgroup that was already offlined. This may then cause insertion of this bfq_group into a service tree. But this bfq_group will get freed as soon as last bio associated with it is completed leading to use after free issues for service tree users. Fix the problem by making sure we always operate on online bfq_group. If the bfq_group associated with the bio is not online, we pick the first online parent.

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, < ccddf8cd411c1800863ed357064e56ceffd356bb | ≥ e21b7a0b988772e82e7147e1c659a5afe2ae003c, < 51f724bffa3403a5236597e6b75df7329c1ec6e9 | ≥ e21b7a0b988772e82e7147e1c659a5afe2ae003c, < 6ee0868b0c3ccead5907685fcdcdd0c08dfe4b0b | ≥ e21b7a0b988772e82e7147e1c659a5afe2ae003c, < 97bd6c56bdcb41079e488e31df56809e3b2ce628 | ≥ e21b7a0b988772e82e7147e1c659a5afe2ae003c, < 7781c38552e6cc54ed8e9040279561340516b881 | ≥ e21b7a0b988772e82e7147e1c659a5afe2ae003c, < 075a53b78b815301f8d3dd1ee2cd99554e34f0dd | 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