CVSS3
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
Confidence
High
EPSS
Percentile
5.1%
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.
Vendor | Product | Version | CPE |
---|---|---|---|
linux | linux_kernel | * | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
git.kernel.org/stable/c/33ec04cadb77605b71d9298311919303d390c4d5
git.kernel.org/stable/c/3b08cfc65f07b1132c1979d73f014ae6e04de55d
git.kernel.org/stable/c/64f00b4df0597590b199b62a37a165473bf658a6
git.kernel.org/stable/c/6787d916c2cf9850c97a0a3f73e08c43e7d973b1
git.kernel.org/stable/c/8435f0961bf3dc65e204094349bd9aeaac1f8868
git.kernel.org/stable/c/92c81fbb3ed2e0dfc33a4183a67135e1ab566ace
git.kernel.org/stable/c/a6fa75b5096c0f9826a4fabe22d907b0a5bb1016
git.kernel.org/stable/c/a83fdaeaea3677b83a53f72ace2d73a19bcd6d93
git.kernel.org/stable/c/d817f0d34d927f2deb17dadbfe212c9a6a32ac3e
lists.debian.org/debian-lts-announce/2024/06/msg00017.html
lists.debian.org/debian-lts-announce/2024/06/msg00020.html