Out-of-bounds read in Linux kernel - CVE-2025-39975

Vulnerability identifier: #VU117266

CSH Severity: Low

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

CVE-ID: CVE-2025-39975

CWE-ID: CWE-125

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to an out-of-bounds read error within the smb2_compound_op() function in fs/smb/client/smb2inode.c. A local user can perform a denial of service (DoS) attack.

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 update from vendor's repository.

python3-perf-debuginfo - addressed in versions 6.6.0-117.0.0.109, 6.6.0-117.0.0.121, 6.6.0-117.0.0.122
kernel - addressed in versions 6.6.0-117.0.0.109, 6.6.0-117.0.0.121, 6.6.0-117.0.0.122
bpftool - addressed in versions 6.6.0-117.0.0.109, 6.6.0-117.0.0.121, 6.6.0-117.0.0.122
bpftool-debuginfo - addressed in versions 6.6.0-117.0.0.109, 6.6.0-117.0.0.121, 6.6.0-117.0.0.122
kernel-debuginfo - addressed in versions 6.6.0-117.0.0.109, 6.6.0-117.0.0.121, 6.6.0-117.0.0.122
kernel-debugsource - addressed in versions 6.6.0-117.0.0.109, 6.6.0-117.0.0.121, 6.6.0-117.0.0.122
kernel-devel - addressed in versions 6.6.0-117.0.0.109, 6.6.0-117.0.0.121, 6.6.0-117.0.0.122
kernel-headers - addressed in versions 6.6.0-117.0.0.109, 6.6.0-117.0.0.121, 6.6.0-117.0.0.122
kernel-source - addressed in versions 6.6.0-117.0.0.109, 6.6.0-117.0.0.121, 6.6.0-117.0.0.122
kernel-tools - addressed in versions 6.6.0-117.0.0.109, 6.6.0-117.0.0.121, 6.6.0-117.0.0.122
kernel-tools-debuginfo - addressed in versions 6.6.0-117.0.0.109, 6.6.0-117.0.0.121, 6.6.0-117.0.0.122
kernel-tools-devel - addressed in versions 6.6.0-117.0.0.109, 6.6.0-117.0.0.121, 6.6.0-117.0.0.122
perf - addressed in versions 6.6.0-117.0.0.109, 6.6.0-117.0.0.121, 6.6.0-117.0.0.122
perf-debuginfo - addressed in versions 6.6.0-117.0.0.109, 6.6.0-117.0.0.121, 6.6.0-117.0.0.122
python3-perf - addressed in versions 6.6.0-117.0.0.109, 6.6.0-117.0.0.121, 6.6.0-117.0.0.122
kernel-extra-modules - update to 6.6.0-117.0.0.122

• https://git.kernel.org/stable/c/093615fc76063ea08d454ba86677ce64c736e806
• https://git.kernel.org/stable/c/ba7bcfd52c66dd1c2dfa5142aca7e4a70b62dfa5
• https://git.kernel.org/stable/c/bfb1e2aad1fecef8320fd71332acde0d53a8d699
• https://git.kernel.org/stable/c/fbe2dc6a9c7318f7263f5e4d50f6272b931c5756

• Out-of-bounds read in Linux kernel smb client
• openEuler 24.03 LTS SP2 update for kernel
• openEuler 24.03 LTS SP1 update for kernel
• openEuler 24.03 LTS update for kernel