What’s Vulnerable › Vulnerabilities

CVE-2026-93812: ksmbd: fix sd_ndr.data memory leak in ksmbd_vfs_set_sd_xattr

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-24 · updated 2026-10-03

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix sd_ndr.data memory leak in ksmbd_vfs_set_sd_xattr ndr_encode_v4_ntacl() allocates sd_ndr.data via kzalloc() at entry. If any subsequent ndr_write_*() call returns error during encoding, the allocated sd_ndr.data won't be freed and causes memory leak. Move kfree(sd_ndr.data) into out label to ensure the buffer gets released on all success and error return paths.

Affected products

• Linux kernel: 5.15 — 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/306d6f370da7e0e5532dc51c972f4ce101e42431
• https://git.kernel.org/stable/c/9b4dec75498fd0a1c9eaea680aef59c9519eb16f
• https://git.kernel.org/stable/c/c521dd78e036b5e0cfd394dd2ff2218890dd9e41
• https://git.kernel.org/stable/c/c866c3314a6853eb06c7a8bef67f43c8a8bdfb6e
• https://git.kernel.org/stable/c/d4d56b00c7df88cd5751e7415bdfabc9fdbc82a7
• https://git.kernel.org/stable/c/dc55270e410ccb4d24e637c13b5c4c25bcd106d7

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