CVE-2022-49411

bfq: Make sure bfqg for which we are queueing requests is online

State: Published
Severity: 7.8 High
Published: Feb 26, 2025
Updated: Aug 5, 2026
Reserved: Feb 26, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-416 Use After Free

Affected Products

Product	Versions
LinuxLinux	e21b7a0b988772e82e7147e1c659a5afe2ae003c to before ccddf8cd411c1800863ed357064e56ceffd356bbAffected e21b7a0b988772e82e7147e1c659a5afe2ae003c to before 51f724bffa3403a5236597e6b75df7329c1ec6e9Affected e21b7a0b988772e82e7147e1c659a5afe2ae003c to before 6ee0868b0c3ccead5907685fcdcdd0c08dfe4b0bAffected e21b7a0b988772e82e7147e1c659a5afe2ae003c to before 97bd6c56bdcb41079e488e31df56809e3b2ce628Affected e21b7a0b988772e82e7147e1c659a5afe2ae003c to before 7781c38552e6cc54ed8e9040279561340516b881Affected e21b7a0b988772e82e7147e1c659a5afe2ae003c to before 075a53b78b815301f8d3dd1ee2cd99554e34f0ddAffected
LinuxLinux	4.12Affected before 4.12Not affected 5.4.198 through 5.4.Not affected 5.10.121 through 5.10.Not affected 5.15.46 through 5.15.Not affected 5.17.14 through 5.17.Not affected 5.18.3 through 5.18.*Not affected 5.19 and laterNot affected

Product

Versions

LinuxLinux

e21b7a0b988772e82e7147e1c659a5afe2ae003c to before ccddf8cd411c1800863ed357064e56ceffd356bbAffected
e21b7a0b988772e82e7147e1c659a5afe2ae003c to before 51f724bffa3403a5236597e6b75df7329c1ec6e9Affected
e21b7a0b988772e82e7147e1c659a5afe2ae003c to before 6ee0868b0c3ccead5907685fcdcdd0c08dfe4b0bAffected
e21b7a0b988772e82e7147e1c659a5afe2ae003c to before 97bd6c56bdcb41079e488e31df56809e3b2ce628Affected
e21b7a0b988772e82e7147e1c659a5afe2ae003c to before 7781c38552e6cc54ed8e9040279561340516b881Affected
e21b7a0b988772e82e7147e1c659a5afe2ae003c to before 075a53b78b815301f8d3dd1ee2cd99554e34f0ddAffected

LinuxLinux

4.12Affected
before 4.12Not affected
5.4.198 through 5.4.*Not affected
5.10.121 through 5.10.*Not affected
5.15.46 through 5.15.*Not affected
5.17.14 through 5.17.*Not affected
5.18.3 through 5.18.*Not affected
5.19 and laterNot affected

References

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