CVE - CVE-2024-26884

CVE-ID
CVE-2024-26884	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix hashtab overflow check on 32-bit arches The hashtab code relies on roundup_pow_of_two() to compute the number of hash buckets, and contains an overflow check by checking if the resulting value is 0. However, on 32-bit arches, the roundup code itself can overflow by doing a 32-bit left-shift of an unsigned long value, which is undefined behaviour, so it is not guaranteed to truncate neatly. This was triggered by syzbot on the DEVMAP_HASH type, which contains the same check, copied from the hashtab code. So apply the same fix to hashtab, by moving the overflow check to before the roundup.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/33ec04cadb77605b71d9298311919303d390c4d5 URL:https://git.kernel.org/stable/c/33ec04cadb77605b71d9298311919303d390c4d5 MISC:https://git.kernel.org/stable/c/3b08cfc65f07b1132c1979d73f014ae6e04de55d URL:https://git.kernel.org/stable/c/3b08cfc65f07b1132c1979d73f014ae6e04de55d MISC:https://git.kernel.org/stable/c/64f00b4df0597590b199b62a37a165473bf658a6 URL:https://git.kernel.org/stable/c/64f00b4df0597590b199b62a37a165473bf658a6 MISC:https://git.kernel.org/stable/c/6787d916c2cf9850c97a0a3f73e08c43e7d973b1 URL:https://git.kernel.org/stable/c/6787d916c2cf9850c97a0a3f73e08c43e7d973b1 MISC:https://git.kernel.org/stable/c/8435f0961bf3dc65e204094349bd9aeaac1f8868 URL:https://git.kernel.org/stable/c/8435f0961bf3dc65e204094349bd9aeaac1f8868 MISC:https://git.kernel.org/stable/c/92c81fbb3ed2e0dfc33a4183a67135e1ab566ace URL:https://git.kernel.org/stable/c/92c81fbb3ed2e0dfc33a4183a67135e1ab566ace MISC:https://git.kernel.org/stable/c/a6fa75b5096c0f9826a4fabe22d907b0a5bb1016 URL:https://git.kernel.org/stable/c/a6fa75b5096c0f9826a4fabe22d907b0a5bb1016 MISC:https://git.kernel.org/stable/c/a83fdaeaea3677b83a53f72ace2d73a19bcd6d93 URL:https://git.kernel.org/stable/c/a83fdaeaea3677b83a53f72ace2d73a19bcd6d93 MISC:https://git.kernel.org/stable/c/d817f0d34d927f2deb17dadbfe212c9a6a32ac3e URL:https://git.kernel.org/stable/c/d817f0d34d927f2deb17dadbfe212c9a6a32ac3e
Assigning CNA
kernel.org
Date Record Created
20240219	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240219)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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