Description

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.

Classification

CVE ID: CVE-2024-47739

CVSS Base Severity: MEDIUM

CVSS Base Score: 5.5

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

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 10.17% (scored less or equal to compared to others)

EPSS Date: 2025-06-02 (when was this score calculated)

Stakeholder-Specific Vulnerability Categorization (SSVC)

SSVC Exploitation: none

SSVC Technical Impact: partial

SSVC Automatable: false

References

https://nvd.nist.gov/vuln/detail/CVE-2024-47739
https://git.kernel.org/stable/c/46c4079460f4dcaf445860679558eedef4e1bc91
https://git.kernel.org/stable/c/72164d5b648951684b1a593996b37a6083c61d7d
https://git.kernel.org/stable/c/ab205e1c3846326f162180e56825b4ba38ce9c30
https://git.kernel.org/stable/c/1b8cf11b3ca593a8802a51802cd0c28c38501428
https://git.kernel.org/stable/c/9e279e6c1f012b82628b89e1b9c65dbefa8ca25a
https://git.kernel.org/stable/c/1bd712de96ad7167fe0d608e706cd60587579f16
https://git.kernel.org/stable/c/9a22b2812393d93d84358a760c347c21939029a6

Timeline