In the Linux kernel, the following vulnerability has been resolved:
ext4: fix possible UAF when remounting r/o a mmp-protected file system
After commit 618f003199c6 ("ext4: fix memory leak in ext4_fill_super"), after the file system is remounted read-only, there is a race where the kmmpd thread can exit, causing sbi->s_mmp_tsk to point at freed memory, which the call to ext4_stop_mmpd() can trip over.
Fix this by only allowing kmmpd() to exit when it is stopped via ext4_stop_mmpd().
Bug-Report-Link: <[email protected]>
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade python-perfUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-livepatch-5.10.82-83.359Upgrade kernel-tools-debuginfoUpgrade kernel-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-develUpgrade bpftool-debuginfoUpgrade bpftoolUpgrade kernel-tools-develUpgrade kernel-headersUpgrade kernelUpgrade perf-debuginfoUpgrade kernel-toolsUpgrade python-perf-debuginfoUpgrade perf | Mar 14, 2025 | May 21, 2024 |
| Debian | — | Upgrade linux | Jul 30, 2024 | May 21, 2024 |
| Huawei Euleros 2_0_sp9 | — | Upgrade kernelUpgrade python3-perfUpgrade kernel-tools-libsUpgrade kernel-tools | Jul 17, 2024 | May 21, 2024 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | May 21, 2024 |
| Ubuntu | — | No solution existsUpgrade linux-azure-fde-5.15 | Jun 26, 2025 | May 21, 2024 |
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