What’s Vulnerable › Vulnerabilities

CVE-2026-64598: smb/client: Fix error code in smb2_aead_req_alloc()

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-06 · updated 2026-10-19
• Weakness: CWE-190

Description

In the Linux kernel, the following vulnerability has been resolved: smb/client: Fix error code in smb2_aead_req_alloc() The "*num_sgs" variable is a u32 so "ERR_PTR(*num_sgs)" doesn't work. We would have to do something similar to the previous line where it's cast to int and then long. However, it's simpler to store the return in an int ret variable. This bug would eventually result in a crash when dereference the invalid error pointer.

Affected products

• Linux kernel: 6.3 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/61f28012e5650c619223decdb7970e0d3162e949
• https://git.kernel.org/stable/c/a187883cc1dc784a4d32537f5d316f1b7b9ad76f
• https://git.kernel.org/stable/c/a1cc432cb0b0a1f74f98a0db3b94ca880c7947ac
• https://git.kernel.org/stable/c/aa37f5fef78dd11cbf983269da2031e12625c56d
• https://git.kernel.org/stable/c/cad756733dc3985188983f3e2eb77e2927209099

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