What’s Vulnerable › Vulnerabilities

CVE-2024-50283: ksmbd: fix slab-use-after-free in smb3_preauth_hash_rsp

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-11-19 · updated 2026-08-04
• Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix slab-use-after-free in smb3_preauth_hash_rsp ksmbd_user_session_put should be called under smb3_preauth_hash_rsp(). It will avoid freeing session before calling smb3_preauth_hash_rsp().

Affected products

• Linux kernel: before 6.1.117; from 6.2 before 6.6.61; from 6.7 before 6.11.8; 6.12-rc1, 6.12-rc2, 6.12-rc3, 6.12-rc4, 6.12-rc5, 6.12-rc6 — fixed in 6.1.117, 6.11.8, 6.6.61

How to fix

Upgrade to a fixed version: Linux kernel 6.1.117, 6.11.8, 6.6.61. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1b6ad475d4ed577d34e0157eb507be00c588bf5c
• https://git.kernel.org/stable/c/b8fc56fbca7482c1e5c0e3351c6ae78982e25ada
• https://git.kernel.org/stable/c/c6cdc08c25a868a08068dfc319fa9fce982b8e7f
• https://git.kernel.org/stable/c/cb645064e0811053c94e86677f2e58ed29359d62
• https://git.kernel.org/stable/c/f7557bbca40d4ca8bb1c6c940ac6c95078bd0827
• https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

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