What’s Vulnerable › Vulnerabilities

CVE-2024-35864: smb: client: fix potential UAF in smb2_is_valid_lease_break()

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-05-19 · updated 2026-08-04
• Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential UAF in smb2_is_valid_lease_break() Skip sessions that are being teared down (status == SES_EXITING) to avoid UAF.

Affected products

• Linux kernel: before 6.1.85; from 6.2 before 6.6.26; from 6.7 before 6.8.5; 6.9-rc1, 6.9-rc2 — fixed in 6.1.85, 6.6.26, 6.8.5

How to fix

Upgrade to a fixed version: Linux kernel 6.1.85, 6.6.26, 6.8.5. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/705c76fbf726c7a2f6ff9143d4013b18daaaebf1
• https://git.kernel.org/stable/c/a8344e2b69bde63f713b0aa796d70dbeadffddfb
• https://git.kernel.org/stable/c/c868cabdf6fdd61bea54532271f4708254e57fc5
• https://git.kernel.org/stable/c/f92739fdd4522c4291277136399353d7c341fae4
• https://git.kernel.org/stable/c/705c76fbf726c7a2f6ff9143d4013b18daaaebf1
• https://git.kernel.org/stable/c/a8344e2b69bde63f713b0aa796d70dbeadffddfb
• https://git.kernel.org/stable/c/c868cabdf6fdd61bea54532271f4708254e57fc5
• https://git.kernel.org/stable/c/f92739fdd4522c4291277136399353d7c341fae4

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