CVE-2024-26884

2024-04-1700:00:00

ubuntu.com

linux kernel

bpf

vulnerability fix

hashtab overflow

32-bit arches

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

AI Score

7.8

Confidence

High

EPSS

Percentile

5.1%

JSON

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.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlinux< 4.15.0-227.239UNKNOWN
ubuntu20.04noarchlinux< 5.4.0-189.209UNKNOWN
ubuntu22.04noarchlinux< 5.15.0-112.122UNKNOWN
ubuntu24.04noarchlinux< 6.8.0-35.35UNKNOWN
ubuntu16.04noarchlinux< anyUNKNOWN
ubuntu18.04noarchlinux-aws< 4.15.0-1170.183UNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1128.138UNKNOWN
ubuntu22.04noarchlinux-aws< 5.15.0-1063.69UNKNOWN
ubuntu24.04noarchlinux-aws< 6.8.0-1009.9UNKNOWN
ubuntu14.04noarchlinux-aws< anyUNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	linux	< 4.15.0-227.239	UNKNOWN
ubuntu	20.04	noarch	linux	< 5.4.0-189.209	UNKNOWN
ubuntu	22.04	noarch	linux	< 5.15.0-112.122	UNKNOWN
ubuntu	24.04	noarch	linux	< 6.8.0-35.35	UNKNOWN
ubuntu	16.04	noarch	linux	< any	UNKNOWN
ubuntu	18.04	noarch	linux-aws	< 4.15.0-1170.183	UNKNOWN
ubuntu	20.04	noarch	linux-aws	< 5.4.0-1128.138	UNKNOWN
ubuntu	22.04	noarch	linux-aws	< 5.15.0-1063.69	UNKNOWN
ubuntu	24.04	noarch	linux-aws	< 6.8.0-1009.9	UNKNOWN
ubuntu	14.04	noarch	linux-aws	< any	UNKNOWN