CVE-2022-49411
bfq: Make sure bfqg for which we are queueing requests is online
CVSS Score
7.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| 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 < ccddf8cd411c1800863ed357064e56ceffd356bb e21b7a0b988772e82e7147e1c659a5afe2ae003c < 51f724bffa3403a5236597e6b75df7329c1ec6e9 e21b7a0b988772e82e7147e1c659a5afe2ae003c < 6ee0868b0c3ccead5907685fcdcdd0c08dfe4b0b e21b7a0b988772e82e7147e1c659a5afe2ae003c < 97bd6c56bdcb41079e488e31df56809e3b2ce628 e21b7a0b988772e82e7147e1c659a5afe2ae003c < 7781c38552e6cc54ed8e9040279561340516b881 e21b7a0b988772e82e7147e1c659a5afe2ae003c < 075a53b78b815301f8d3dd1ee2cd99554e34f0dd
Linux / Linux
4.12
References
git.kernel.org: https://git.kernel.org/stable/c/ccddf8cd411c1800863ed357064e56ceffd356bb git.kernel.org: https://git.kernel.org/stable/c/51f724bffa3403a5236597e6b75df7329c1ec6e9 git.kernel.org: https://git.kernel.org/stable/c/6ee0868b0c3ccead5907685fcdcdd0c08dfe4b0b git.kernel.org: https://git.kernel.org/stable/c/97bd6c56bdcb41079e488e31df56809e3b2ce628 git.kernel.org: https://git.kernel.org/stable/c/7781c38552e6cc54ed8e9040279561340516b881 git.kernel.org: https://git.kernel.org/stable/c/075a53b78b815301f8d3dd1ee2cd99554e34f0dd