Out-of-bounds write in Linux kernel - CVE-2026-74724

Vulnerability identifier: #VU144606

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-74724

CWE-ID: CWE-787

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local attacker to cause memory corruption.

The vulnerability exists due to an out-of-bounds write in ip_vs_nat_icmp when processing ICMP packets with a modified embedded IPv4 header length field. A local attacker can modify a packet while it is processed by IPVS to cause memory corruption.

Linux kernel
Debian Linux
openEuler
kernel-headers
python3-perf-debuginfo
python3-perf
perf-debuginfo
perf
kernel-tools-devel
kernel-tools-debuginfo
kernel-tools
kernel-source
kernel-extra-modules
kernel-devel
kernel-debugsource
kernel-debuginfo
bpftool-debuginfo
bpftool
kernel
linux (Debian package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
kernel-headers - update to 6.6.0-145.3.31.162
python3-perf-debuginfo - update to 6.6.0-145.3.31.162
python3-perf - update to 6.6.0-145.3.31.162
perf-debuginfo - update to 6.6.0-145.3.31.162
perf - update to 6.6.0-145.3.31.162
kernel-tools-devel - update to 6.6.0-145.3.31.162
kernel-tools-debuginfo - update to 6.6.0-145.3.31.162
kernel-tools - update to 6.6.0-145.3.31.162
kernel-source - update to 6.6.0-145.3.31.162
kernel-extra-modules - update to 6.6.0-145.3.31.162
kernel-devel - update to 6.6.0-145.3.31.162
kernel-debugsource - update to 6.6.0-145.3.31.162
kernel-debuginfo - update to 6.6.0-145.3.31.162
bpftool-debuginfo - update to 6.6.0-145.3.31.162
bpftool - update to 6.6.0-145.3.31.162
kernel - update to 6.6.0-145.3.31.162
linux (Debian package) - update to 6.12.105-1

• https://git.kernel.org/stable/c/243d0187ec4c3837b9b0004f18d1068e46115760
• https://git.kernel.org/stable/c/3b8f79af0e98f27b932b0b416e9c52b692d31ff9
• https://git.kernel.org/stable/c/3c779b258c9c3c3567af68d4f45c2f751f35bd0e
• https://git.kernel.org/stable/c/646922a0379496154e8c8faca4f8e2fd9100cacc
• https://git.kernel.org/stable/c/a69a4b3fff5814d079beff9a1e9d369994b2ed47
• https://git.kernel.org/stable/c/be65fa324640c7a95e30b146159a2be5cc73f22e

• Out-of-bounds write in Linux kernel netfilter ipvs
• Debian update for linux
• openEuler 24.03 LTS SP3 update for kernel