CVE-2022-49413
bfq: Update cgroup information before merging bio
CVSS Score
7.8
EPSS Score
0.0%
EPSS Percentile
0th
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().
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Feb 26, 2025 |
| Last Updated | May 11, 2026 |
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Affected Versions
Linux / Linux
e21b7a0b988772e82e7147e1c659a5afe2ae003c < da9f3025d595956410ceaab2bea01980d7775948 e21b7a0b988772e82e7147e1c659a5afe2ae003c < b06691af08b41dfd81052a3362514d9827b44bb1 e21b7a0b988772e82e7147e1c659a5afe2ae003c < e8821f45612f2e6d9adb9c6ba0fb4184f57692aa e21b7a0b988772e82e7147e1c659a5afe2ae003c < d9165200c5627a2cf4408eefabdf0058bdf95e1a e21b7a0b988772e82e7147e1c659a5afe2ae003c < 2a1077f17169a6059992a0bbdb330e0abad1e6d9 e21b7a0b988772e82e7147e1c659a5afe2ae003c < ea591cd4eb270393810e7be01feb8fde6a34fbbe
Linux / Linux
4.12
References
git.kernel.org: https://git.kernel.org/stable/c/da9f3025d595956410ceaab2bea01980d7775948 git.kernel.org: https://git.kernel.org/stable/c/b06691af08b41dfd81052a3362514d9827b44bb1 git.kernel.org: https://git.kernel.org/stable/c/e8821f45612f2e6d9adb9c6ba0fb4184f57692aa git.kernel.org: https://git.kernel.org/stable/c/d9165200c5627a2cf4408eefabdf0058bdf95e1a git.kernel.org: https://git.kernel.org/stable/c/2a1077f17169a6059992a0bbdb330e0abad1e6d9 git.kernel.org: https://git.kernel.org/stable/c/ea591cd4eb270393810e7be01feb8fde6a34fbbe