linux: A use-after-free vulnerability in the Linux Kernel io_uring subsystem can be exploited to achieve local privilege esc...
CVE-2023-2236 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-2236, released May 1, 2023. It is not reported as exploited. Patch Radar priority: High.
A use-after-free vulnerability in the Linux Kernel io_uring subsystem can be exploited to achieve local privilege escalation. Both io_install_fixed_file and its callers call fput in a file in case of an error, causing a reference underflow which leads to a use-after-free vulnerability. We recommend upgrading past commit 9d94c04c0db024922e886c9fd429659f22f48ea4.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| linux · Debian 12.15 (bookworm) | 6.0.12-1 | DEBIAN-CVE-2023-2236 | May 1, 2023 |
| linux · Debian 13.5 (trixie) | 6.0.12-1 | DEBIAN-CVE-2023-2236 | May 1, 2023 |
| linux · Debian 14 | 6.0.12-1 | DEBIAN-CVE-2023-2236 | May 1, 2023 |
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