CVE-2024-47739

Summary

In the Linux kernel, the following vulnerability has been resolved: padata: use integer wrap around to prevent deadlock on seq_nr overflow When submitting more than 2^32 padata objects to padata_do_serial, the current sorting implementation incorrectly sorts padata objects with overflowed seq_nr, causing them to be placed before existing objects in the reorder list. This leads to a deadlock in the serialization process as padata_find_next cannot match padata->seq_nr and pd->processed because the padata instance with overflowed seq_nr will be selected next. To fix this, we use an unsigned integer wrap around to correctly sort padata objects in scenarios with integer overflow.

Impact & exploitability

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products we track (1)

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Official patch: https://git.kernel.org/stable/c/1b8cf11b3ca593a8802a51802cd0c28c38501428 ↗

Additional information

• NVD record
• https://git.kernel.org/stable/c/1b8cf11b3ca593a8802a51802cd0c28c38501428Patch
• https://git.kernel.org/stable/c/1bd712de96ad7167fe0d608e706cd60587579f16Patch
• https://git.kernel.org/stable/c/46c4079460f4dcaf445860679558eedef4e1bc91Patch
• https://git.kernel.org/stable/c/72164d5b648951684b1a593996b37a6083c61d7dPatch
• https://git.kernel.org/stable/c/9a22b2812393d93d84358a760c347c21939029a6Patch
• https://git.kernel.org/stable/c/9e279e6c1f012b82628b89e1b9c65dbefa8ca25aPatch
• https://git.kernel.org/stable/c/ab205e1c3846326f162180e56825b4ba38ce9c30Patch
• https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html