In the Linux kernel, the following vulnerability has been resolved:
Revert "Revert "block, bfq: honor already-setup queue merges""
A crash [1] happened to be triggered in conjunction with commit 2d52c58b9c9b ("block, bfq: honor already-setup queue merges"). The latter was then reverted by commit ebc69e897e17 ("Revert "block, bfq: honor already-setup queue merges""). Yet, the reverted commit was not the one introducing the bug. In fact, it actually triggered a UAF introduced by a different commit, and now fixed by commit d29bd41428cf ("block, bfq: reset last_bfqq_created on group change").
So, there is no point in keeping commit 2d52c58b9c9b ("block, bfq: honor already-setup queue merges") out. This commit restores it.
[1] https://bugzilla.kernel.org/show_bug.cgi?id=214503
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-headersUpgrade kernel-debuginfo-common-x86_64Upgrade kernelUpgrade python-perfUpgrade bpftool-debuginfoUpgrade python-perf-debuginfoUpgrade kernel-debuginfoUpgrade kernel-toolsUpgrade perf-debuginfoUpgrade kernel-tools-develUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-livepatch-5.10.112-108.499Upgrade bpftoolUpgrade kernel-tools-debuginfoUpgrade perfUpgrade kernel-devel | Apr 10, 2025 | Feb 26, 2025 |
| Debian | — | Upgrade linux | Feb 27, 2025 | Feb 27, 2025 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Feb 26, 2025 |
| Ubuntu | — | Upgrade linux-awsUpgrade linuxUpgrade linux-lowlatency-hwe-5.15Upgrade linux-azureUpgrade linux-hwe-5.15Upgrade linux-intel-iotg-5.15Upgrade linux-realtimeUpgrade linux-oracleUpgrade linux-raspiUpgrade linux-intel-iotgUpgrade linux-azure-5.15Upgrade linux-kvmUpgrade linux-ibmUpgrade linux-gkeUpgrade linux-gcpUpgrade linux-lowlatency | Mar 3, 2025 | Feb 26, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Feb 26, 2025 |
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