In the Linux kernel, the following vulnerability has been resolved:
block, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq
Commit 64dc8c732f5c ("block, bfq: fix possible uaf for 'bfqq->bic'") will access 'bic->bfqq' in bic_set_bfqq(), however, bfq_exit_icq_bfqq() can free bfqq first, and then call bic_set_bfqq(), which will cause uaf.
Fix the problem by moving bfq_exit_bfqq() behind bic_set_bfqq().
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade perfUpgrade kernel-headersUpgrade kernel-toolsUpgrade kernel-tools-develUpgrade kernel-debuginfo-common-aarch64Upgrade kernelUpgrade perf-debuginfoUpgrade kernel-livepatch-5.15.90-54.138Upgrade python-perf-debuginfoUpgrade bpftool-debuginfoUpgrade python-perfUpgrade kernel-tools-debuginfoUpgrade bpftoolUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-develUpgrade kernel-debuginfo | May 20, 2026 | May 20, 2026 |
| Debian | — | Upgrade linux | Sep 17, 2025 | Sep 17, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-abi-stablelistsUpgrade kernel-toolsUpgrade kernelUpgrade bpftoolUpgrade kernel-tools-libsUpgrade python3-perf | Mar 10, 2026 | Mar 10, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Sep 15, 2025 |
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