CVE-2024-47739 padata: use integer wrap around to prevent deadlock on seq_nr overflow

What is CVE-2024-47739?

CVE-2024-47739 is a high-severity vulnerability in Linux kernel, published on 21 Oct 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-190

Which versions are affected by CVE-2024-47739?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-47739?

Apply the vendor's patch.

Is CVE-2024-47739 being exploited?

There is no known exploitation of CVE-2024-47739 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-50809, AZL-50996, BELL-CVE-2024-47739, DEBIAN-CVE-2024-47739, GHSA-c5xm-9r44-7w3j, UBUNTU-CVE-2024-47739.