PT-2024-3393 · Linux+5 · Linux Kernel+5
Syzbot
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Published
2024-03-07
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Updated
2025-09-29
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CVE-2024-26885
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions:
Linux kernel (affected versions not specified)
Description:
The issue is related to an integer overflow in the devmap code of the Linux kernel's BPF subsystem. This occurs when the devmap code allocates a number of hash buckets equal to the next power of two of the max entries value provided when creating the map. On 32-bit architectures, the rounding up itself can overflow mid-way through, leading to undefined behavior. Syzbot was able to turn this into a crash on arm32 by creating a DEVMAP HASH with max entries > 0x80000000 and then trying to update it. The fix involves moving the overflow check to before the rounding up operation.
Recommendations:
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Buffer Overflow
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Linuxmint
Linux Kernel
Red Os
Suse
Ubuntu