cbcvebase.
CVE-2024-26883
published 2024-04-17

CVE-2024-26883: In the Linux kernel, the following vulnerability has been resolved: bpf: Fix stackmap overflow check on 32-bit arches The stackmap code relies on…

PriorityP340high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.25%
16.6th percentile
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix stackmap overflow check on 32-bit arches The stackmap 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. The commit in the fixes tag actually attempted to fix this, but the fix did not account for the UB, so the fix only works on CPUs where an overflow does result in a neat truncation to zero, which is not guaranteed. Checking the value before rounding does not have this problem.

Affected

40 ranges· showing 25
VendorProductVersion rangeFixed in
debiandebian_linux
debianlinux< linux 6.1.85-1 (bookworm)linux 6.1.85-1 (bookworm)
linuxlinux
linuxlinux
linuxlinux
linuxlinux>= 063c722dd9d285d877e6fd499e753d6224f4c046 < d0e214acc59145ce25113f617311aa79dda39cb3d0e214acc59145ce25113f617311aa79dda39cb3
linuxlinux>= 4.14.222 < 4.154.15
linuxlinux>= 4.19.177 < 4.19.3114.19.311
linuxlinux>= 4.9.258 < 4.104.10
linuxlinux>= 5.10.17 < 5.10.2145.10.214
linuxlinux>= 5.4.99 < 5.4.2735.4.273
linuxlinux>= 6183f4d3a0a2ad230511987c6c362ca43ec0055f < ca1f06e72dec41ae4f76e7b1a8a97265447b46aeca1f06e72dec41ae4f76e7b1a8a97265447b46ae
linuxlinux>= 6183f4d3a0a2ad230511987c6c362ca43ec0055f < f06899582ccee09bd85d0696290e3eaca9aa042df06899582ccee09bd85d0696290e3eaca9aa042d
linuxlinux>= 6183f4d3a0a2ad230511987c6c362ca43ec0055f < 7070b274c7866a4c5036f8d54fcaf315c64ac33a7070b274c7866a4c5036f8d54fcaf315c64ac33a
linuxlinux>= 6183f4d3a0a2ad230511987c6c362ca43ec0055f < 43f798b9036491fb014b55dd61c4c5c3193267d043f798b9036491fb014b55dd61c4c5c3193267d0
linuxlinux>= 6183f4d3a0a2ad230511987c6c362ca43ec0055f < 0971126c8164abe2004b8536b49690a0d6005b0a0971126c8164abe2004b8536b49690a0d6005b0a
linuxlinux>= 6183f4d3a0a2ad230511987c6c362ca43ec0055f < 7a4b21250bf79eef26543d35bd390448646c536b7a4b21250bf79eef26543d35bd390448646c536b
linuxlinux>= 7e3a6b820535eb395784060ae26c5af579528fa0 < 21e5fa4688e1a4d3db6b72216231b24232f75c1d21e5fa4688e1a4d3db6b72216231b24232f75c1d
linuxlinux>= 8032bf2af9ce26b3a362b9711d15f626ab946a74 < 15641007df0f0d35fa28742b25c2a7db9dcd689515641007df0f0d35fa28742b25c2a7db9dcd6895
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

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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