CVE-2024-26884

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2024-26884
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-26884.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2024-26884
Downstream
Related
Published
2024-04-17T10:27:39.672Z
Modified
2026-03-20T12:35:16.750907Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
bpf: Fix hashtab overflow check on 32-bit arches
Details

In the Linux kernel, the following vulnerability has been resolved:

bpf: Fix hashtab overflow check on 32-bit arches

The hashtab code relies on rounduppowoftwo() 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 DEVMAPHASH 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.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26884.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
daaf427c6ab392bedcd018e326b2ffa1e1110cd6
Fixed
33ec04cadb77605b71d9298311919303d390c4d5
Fixed
92c81fbb3ed2e0dfc33a4183a67135e1ab566ace
Fixed
64f00b4df0597590b199b62a37a165473bf658a6
Fixed
3b08cfc65f07b1132c1979d73f014ae6e04de55d
Fixed
a83fdaeaea3677b83a53f72ace2d73a19bcd6d93
Fixed
8435f0961bf3dc65e204094349bd9aeaac1f8868
Fixed
d817f0d34d927f2deb17dadbfe212c9a6a32ac3e
Fixed
a6fa75b5096c0f9826a4fabe22d907b0a5bb1016
Fixed
6787d916c2cf9850c97a0a3f73e08c43e7d973b1

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-26884.json"