Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected daaf427c6ab392bedcd018e326b2ffa1e1110cd6 before 33ec04cadb77605b71d9298311919303d390c4d5; affected daaf427c6ab392bedcd018e326b2ffa1e1110cd6 before 92c81fbb3ed2e0dfc33a4183a67135e1ab566ace; affected daaf427c6ab392bedcd018e326b2ffa1e1110cd6 before 64f00b4df0597590b199b62a37a165473bf658a6; affected daaf427c6ab392bedcd018e326b2ffa1e1110cd6 before 3b08cfc65f07b1132c1979d73f014ae6e04de55d; affected daaf427c6ab392bedcd018e326b2ffa1e1110cd6 before a83fdaeaea3677b83a53f72ace2d73a19bcd6d93; affected daaf427c6ab392bedcd018e326b2ffa1e1110cd6 before 8435f0961bf3dc65e204094349bd9aeaac1f8868; affected daaf427c6ab392bedcd018e326b2ffa1e1110cd6 before d817f0d34d927f2deb17dadbfe212c9a6a32ac3e; affected daaf427c6ab392bedcd018e326b2ffa1e1110cd6 before a6fa75b5096c0f9826a4fabe22d907b0a5bb1016; affected daaf427c6ab392bedcd018e326b2ffa1e1110cd6 before 6787d916c2cf9850c97a0a3f73e08c43e7d973b1 |
| Linux / Linux | affected 3.19; unaffected 0 before 3.19; unaffected 4.19.311 through 4.19.*; unaffected 5.4.273 through 5.4.*; unaffected 5.10.214 through 5.10.*; unaffected 5.15.153 through 5.15.*; unaffected 6.1.83 through 6.1.*; unaffected 6.6.23 through 6.6.*; unaffected 6.7.11 through 6.7.*; unaffected 6.8.2 through 6.8.*; unaffected 6.9 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/33ec04cadb77605b71d9298311919303d390c4d5
- https://git.kernel.org/stable/c/92c81fbb3ed2e0dfc33a4183a67135e1ab566ace
- https://git.kernel.org/stable/c/64f00b4df0597590b199b62a37a165473bf658a6
- https://git.kernel.org/stable/c/3b08cfc65f07b1132c1979d73f014ae6e04de55d
- https://git.kernel.org/stable/c/a83fdaeaea3677b83a53f72ace2d73a19bcd6d93
- https://git.kernel.org/stable/c/8435f0961bf3dc65e204094349bd9aeaac1f8868
- https://git.kernel.org/stable/c/d817f0d34d927f2deb17dadbfe212c9a6a32ac3e
- https://git.kernel.org/stable/c/a6fa75b5096c0f9826a4fabe22d907b0a5bb1016
- https://git.kernel.org/stable/c/6787d916c2cf9850c97a0a3f73e08c43e7d973b1
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.
- https://git.kernel.org/stable/c/33ec04cadb77605b71d9298311919303d390c4d5
- https://git.kernel.org/stable/c/92c81fbb3ed2e0dfc33a4183a67135e1ab566ace
- https://git.kernel.org/stable/c/64f00b4df0597590b199b62a37a165473bf658a6
- https://git.kernel.org/stable/c/3b08cfc65f07b1132c1979d73f014ae6e04de55d
- https://git.kernel.org/stable/c/a83fdaeaea3677b83a53f72ace2d73a19bcd6d93
- https://git.kernel.org/stable/c/8435f0961bf3dc65e204094349bd9aeaac1f8868
- https://git.kernel.org/stable/c/d817f0d34d927f2deb17dadbfe212c9a6a32ac3e
- https://git.kernel.org/stable/c/a6fa75b5096c0f9826a4fabe22d907b0a5bb1016
- https://git.kernel.org/stable/c/6787d916c2cf9850c97a0a3f73e08c43e7d973b1
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
No English description supplied.