Integer overflow in Linux kernel - CVE-2026-74394

Vulnerability identifier: #VU142730

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-74394

CWE-ID: CWE-190

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to integer overflow in the immediate data length check in the RDMA/srpt subsystem when processing user-supplied immediate data received over the network. A remote attacker can send a specially crafted network request with an oversized length value to cause a denial of service.

The length field is user-controlled and may wrap the computed request size, bypassing the bounds check before a very large length is passed to sg_init_one().

Linux kernel
openEuler
python3-perf-debuginfo
kernel
bpftool
bpftool-debuginfo
kernel-debuginfo
kernel-debugsource
kernel-devel
kernel-headers
kernel-source
kernel-tools
kernel-tools-debuginfo
kernel-tools-devel
perf
perf-debuginfo
python3-perf
kernel-extra-modules

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
python3-perf-debuginfo - addressed in versions 5.10.0-331.0.0.232, 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel - addressed in versions 5.10.0-331.0.0.232, 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
bpftool - addressed in versions 5.10.0-331.0.0.232, 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
bpftool-debuginfo - addressed in versions 5.10.0-331.0.0.232, 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-debuginfo - addressed in versions 5.10.0-331.0.0.232, 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-debugsource - addressed in versions 5.10.0-331.0.0.232, 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-devel - addressed in versions 5.10.0-331.0.0.232, 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-headers - addressed in versions 5.10.0-331.0.0.232, 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-source - addressed in versions 5.10.0-331.0.0.232, 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-tools - addressed in versions 5.10.0-331.0.0.232, 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-tools-debuginfo - addressed in versions 5.10.0-331.0.0.232, 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-tools-devel - addressed in versions 5.10.0-331.0.0.232, 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
perf - addressed in versions 5.10.0-331.0.0.232, 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
perf-debuginfo - addressed in versions 5.10.0-331.0.0.232, 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
python3-perf - addressed in versions 5.10.0-331.0.0.232, 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-extra-modules - update to 6.6.0-145.3.29.160

• https://git.kernel.org/stable/c/067b9556eeb007f28b7c2033b4dcde5b6d88418f
• https://git.kernel.org/stable/c/07dec3f6dcb6c6cc891162d252b800eb0e6d5e8e
• https://git.kernel.org/stable/c/3efa5301137140a3ca3677a9098c0a93a0acfd49
• https://git.kernel.org/stable/c/65572fbd86033ae2370125593d59b8be34253aaf
• https://git.kernel.org/stable/c/72497172a4799119a0282a5eb5e2b8ddcc821921
• https://git.kernel.org/stable/c/c82c860f8c8e4f4f454c9f14d0ad0c0466965f7d
• https://git.kernel.org/stable/c/dcf7a986f377cce0749ed53f1d64195fbd5fdf91
• https://git.kernel.org/stable/c/eb4ecdf631fe00e8020bf461503cb9b7017ed796

• Integer overflow in Linux kernel ulp srpt driver
• openEuler 24.03 LTS SP3 update for kernel
• openEuler 24.03 LTS SP1 update for kernel
• openEuler 22.03 LTS SP4 update for kernel