CVE-2024-47739: padata: use integer wrap around to prevent deadlock on seq_nr overflow
First published: Mon Oct 21 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=5.4<5.10.227 | |
| Linux Kernel | >=5.11<5.15.168 | |
| Linux Kernel | >=5.16<6.1.113 | |
| Linux Kernel | >=6.2<6.6.54 | |
| Linux Kernel | >=6.7<6.10.13 | |
| Linux Kernel | >=6.11<6.11.2 | |
| debian/linux | <=5.10.223-1<=5.10.226-1 | 6.1.123-1 6.1.128-1 6.12.12-1 6.12.15-1 |
| debian/linux-6.1 | 6.1.119-1~deb11u1 |
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Reference Links
- https://git.kernel.org/stable/c/1b8cf11b3ca593a8802a51802cd0c28c38501428
- https://git.kernel.org/stable/c/1bd712de96ad7167fe0d608e706cd60587579f16
- https://git.kernel.org/stable/c/46c4079460f4dcaf445860679558eedef4e1bc91
- https://git.kernel.org/stable/c/72164d5b648951684b1a593996b37a6083c61d7d
- https://git.kernel.org/stable/c/9a22b2812393d93d84358a760c347c21939029a6
- https://git.kernel.org/stable/c/9e279e6c1f012b82628b89e1b9c65dbefa8ca25a
- https://git.kernel.org/stable/c/ab205e1c3846326f162180e56825b4ba38ce9c30
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-47739
- https://nvd.nist.gov/vuln/detail/CVE-2024-47739
- https://launchpad.net/bugs/cve/CVE-2024-47739
- https://security-tracker.debian.org/tracker/CVE-2024-47739
- https://ubuntu.com/security/CVE-2024-47739
- https://git.kernel.org/linus/9a22b2812393d93d84358a760c347c21939029a6
Frequently Asked Questions
What is the severity of CVE-2024-47739?
CVE-2024-47739 is considered a high-severity vulnerability due to its potential to cause deadlocks in the Linux kernel.
How do I fix CVE-2024-47739?
To fix CVE-2024-47739, upgrade your Linux kernel to a version that is patched, such as 6.1.123-1 or later.
What software versions are affected by CVE-2024-47739?
CVE-2024-47739 affects various versions of the Linux kernel including versions from 5.4 to 6.11.2.
What causes the vulnerability CVE-2024-47739?
CVE-2024-47739 is caused by an integer wrap around in the padata sorting implementation, leading to incorrect handling of padata objects.
Is the vulnerability CVE-2024-47739 present in all Linux distributions?
No, CVE-2024-47739 is specific to Linux kernel versions and may not be present in all distributions depending on their kernel version.
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