cbcvebase.
CVE-2024-26884
published 2024-04-17

CVE-2024-26884: In the Linux kernel, the following vulnerability has been resolved: bpf: Fix hashtab overflow check on 32-bit arches The hashtab code relies on…

PriorityP339high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.25%
16.6th percentile
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

31 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.85-1 (bookworm)linux 6.1.85-1 (bookworm)
linuxlinux
linuxlinux>= daaf427c6ab392bedcd018e326b2ffa1e1110cd6 < 33ec04cadb77605b71d9298311919303d390c4d533ec04cadb77605b71d9298311919303d390c4d5
linuxlinux>= daaf427c6ab392bedcd018e326b2ffa1e1110cd6 < 92c81fbb3ed2e0dfc33a4183a67135e1ab566ace92c81fbb3ed2e0dfc33a4183a67135e1ab566ace
linuxlinux>= daaf427c6ab392bedcd018e326b2ffa1e1110cd6 < 64f00b4df0597590b199b62a37a165473bf658a664f00b4df0597590b199b62a37a165473bf658a6
linuxlinux>= daaf427c6ab392bedcd018e326b2ffa1e1110cd6 < 3b08cfc65f07b1132c1979d73f014ae6e04de55d3b08cfc65f07b1132c1979d73f014ae6e04de55d
linuxlinux>= daaf427c6ab392bedcd018e326b2ffa1e1110cd6 < a83fdaeaea3677b83a53f72ace2d73a19bcd6d93a83fdaeaea3677b83a53f72ace2d73a19bcd6d93
linuxlinux>= daaf427c6ab392bedcd018e326b2ffa1e1110cd6 < 8435f0961bf3dc65e204094349bd9aeaac1f88688435f0961bf3dc65e204094349bd9aeaac1f8868
linuxlinux>= daaf427c6ab392bedcd018e326b2ffa1e1110cd6 < d817f0d34d927f2deb17dadbfe212c9a6a32ac3ed817f0d34d927f2deb17dadbfe212c9a6a32ac3e
linuxlinux>= daaf427c6ab392bedcd018e326b2ffa1e1110cd6 < a6fa75b5096c0f9826a4fabe22d907b0a5bb1016a6fa75b5096c0f9826a4fabe22d907b0a5bb1016
linuxlinux>= daaf427c6ab392bedcd018e326b2ffa1e1110cd6 < 6787d916c2cf9850c97a0a3f73e08c43e7d973b16787d916c2cf9850c97a0a3f73e08c43e7d973b1
linuxlinux_kernel>= 0 < 5.10.216-15.10.216-1
linuxlinux_kernel>= 0 < 6.1.85-16.1.85-1
linuxlinux_kernel>= 0 < 6.7.12-16.7.12-1
linuxlinux_kernel>= 0 < 6.7.12-16.7.12-1
linuxlinux_kernel>= 0 < 5.4.0-189.2095.4.0-189.209
linuxlinux_kernel>= 0 < 5.15.0-112.1225.15.0-112.122
linuxlinux_kernel>= 0 < 6.8.0-35.356.8.0-35.35
linuxlinux_kernel>= 0 < 4.4.0-257.2914.4.0-257.291
linuxlinux_kernel>= 3.19 < 4.19.3114.19.311
linuxlinux_kernel>= 4.20 < 5.4.2735.4.273
linuxlinux_kernel>= 5.11 < 5.15.1535.15.153
linuxlinux_kernel>= 5.16 < 6.1.836.1.83
linuxlinux_kernel>= 5.5 < 5.10.2145.10.214
linuxlinux_kernel>= 6.2 < 6.6.236.6.23

CVSS provenance

nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv7.8HIGH
vendor_debian7.8HIGH
vendor_msrc7.8HIGH
vendor_redhat7.8HIGH
vendor_ubuntu7.0HIGH
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