Yüksek CVSS 7.8

CVE-2024-26883: Debian Linux: güvenlik açığı

Yayın: 17 Nisan 2024 14:15 · Güncelleme: 6 Kasım 2026 09:48

Açıklama (NVD)

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.

Özet bilgiler

Ürün: Debian Debian Linux
CVSS v3.1: 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS: %0,25 (yüzdelik 17)
CWE: CWE-119
Yama: Mevcut

Etkilenen sürümler

Ürün	Başlangıç	Bitiş	Düzeltildi
debian-debian-linux	10.0	10.0	—
linux-linux-kernel	4.9.258	—	4.10
linux-linux-kernel	4.14.222	—	4.15
linux-linux-kernel	4.19.177	—	4.19.311
linux-linux-kernel	5.4.99	—	5.4.273
linux-linux-kernel	5.10.17	—	5.10.214
linux-linux-kernel	5.11	—	5.15.153
linux-linux-kernel	5.16	—	6.1.83
linux-linux-kernel	6.2	—	6.6.23
linux-linux-kernel	6.7	—	6.7.11
linux-linux-kernel	6.8	—	6.8.2

Kaynaklar

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