CVE-2025-38562

ksmbd: fix null pointer dereference error in generate_encryptionkey

MEDIUM

5.5

CVSS Score

Published: August 19, 2025 at 05:02 PM UTC

Updated: June 17, 2026 at 09:17 AM UTC

2 products affected across 2 vendorsLinux KernelDebian Linux

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Severity

MEDIUM5.5

Exploit prediction

EPSS 12%

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix null pointer dereference error in generate_encryptionkey If client send two session setups with krb5 authenticate to ksmbd, null pointer dereference error in generate_encryptionkey could happen. sess->Preauth_HashValue is set to NULL if session is valid. So this patch skip generate encryption key if session is valid.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux · Debiandrupal

95%

11.0

Linux Kernel · Linux

95%

5.15 ≤ v < 5.15.2035.15 ≤ v < 6.1.1485.15 ≤ v < 6.12.425.15 ≤ v < 6.15.105.15 ≤ v < 6.16.15.15 ≤ v < 6.175.15 ≤ v < 6.6.1026.13 ≤ v < 6.15.106.16 ≤ v < 6.16.16.2 ≤ v < 6.6.1026.7 ≤ v < 6.12.425.15626e6641f6b467447c81dd7678a69c66f7746cf

Vendor states this is fixed in 015ef163d65496ae3ba6192c96140a22743f0353 (fixed)

Vendor states this is fixed in 2a30ed6428ce83afedca1a6c5c5c4247bcf12d0e (fixed)

Vendor states this is fixed in 922f85e6e88fdea723a26854c3a6dcb4beb8d0b9 (fixed)

Vendor states this is fixed in 96a82e19434a2522525baab59c33332658bc7653 (fixed)

Vendor states this is fixed in 9b493ab6f35178afd8d619800df9071992f715de (fixed)

Vendor states this is fixed in 9c2dbbc959e1fcc6f603a1a843e9cf743ba383bb (fixed)

Vendor states this is fixed in d79c8bebaa622ee223128be7c66d8aaeeb634a57 (fixed)

Vendor states this is fixed in 5.15 (unaffected)

Vendor states this is fixed in 5.15.203 (unaffected)

Vendor states this is fixed in 6.1.148 (unaffected)

Vendor states this is fixed in 6.12.42 (unaffected)

Vendor states this is fixed in 6.15.10 (unaffected)