CVE-2026-93811: vulnerability in Linux
ksmbd: Fix acl.sd_buf memory leak and invalid sd_size error handling
Published · Updated
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.2%
exploitation probability
0.2%top 94% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: Fix acl.sd_buf memory leak and invalid sd_size error handling
1. When ndr_decode_v4_ntacl() fails, the code jumped to free_n_data
which only freed n.data, skipping kfree(acl.sd_buf) and leaking
the buffer. Zero-initialize struct xattr_ntacl acl, reorder error
labels to out_free to release acl.sd_buf on all error paths.
2. if (acl.sd_size < sizeof(struct smb_ntsd)) is true, original code
returned success without freeing sd_buf and left stale *pntsd.
Set rc = -EINVAL before jumping to out_free to return error code and
free buffer.
Affected products
Linux · LinuxRelated CVEs — Linux
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References
https://git.kernel.org/stable/c/6e6329322ad733c5b23555c609353841560b26bchttps://git.kernel.org/stable/c/86c2625fb9863139b359805fc6be1e31edbd3d65https://git.kernel.org/stable/c/c3836f55e0dab96314774215e12d87f63fa919f2https://git.kernel.org/stable/c/d708a36634bb7b6f94d0e76d587d2ec50b2b93b5https://git.kernel.org/stable/c/edc17db83085624a2b1bacf6a4521d7f15571737https://git.kernel.org/stable/c/f46a70a082bdbfecbe074af8a719c26c4deb58c6