What’s Vulnerable › Vulnerabilities

CVE-2025-38737: cifs: Fix oops due to uninitialised variable

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-09-05 · updated 2026-10-19
• Weakness: CWE-908

Description

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix oops due to uninitialised variable Fix smb3_init_transform_rq() to initialise buffer to NULL before calling netfs_alloc_folioq_buffer() as netfs assumes it can append to the buffer it is given. Setting it to NULL means it should start a fresh buffer, but the value is currently undefined.

Affected products

• Linux kernel: from 6.12 before 6.12.44; from 6.13 before 6.16.4; 6.17-rc1, 6.17-rc2 — fixed in 6.12.44, 6.16.4

How to fix

Upgrade to a fixed version: Linux kernel 6.12.44, 6.16.4. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/453a6d2a68e54a483d67233c6e1e24c4095ee4be
• https://git.kernel.org/stable/c/4931fe2dbe1cc0e7d350a4b51b0b330e43971d98
• https://git.kernel.org/stable/c/6adaa9fae36f848afa7278945d725e197e33c496

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