CVE-2026-93811ksmbd: Fix acl.sd_buf memory leak and invalid sd_size error handling
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 3, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from cb69d4d6f709f87c94afa28ae64c501576692171 before f46a70a082bdbfecbe074af8a719c26c4deb58c6; from 8f0541186e9ad1b62accc9519cc2b7a7240272a7 before 86c2625fb9863139b359805fc6be1e31edbd3d65; from 8f0541186e9ad1b62accc9519cc2b7a7240272a7 before edc17db83085624a2b1bacf6a4521d7f15571737; from 8f0541186e9ad1b62accc9519cc2b7a7240272a7 before c3836f55e0dab96314774215e12d87f63fa919f2; 8f0541186e9ad1b62accc9519cc2b7a7240272a7 builds before 6e6329322ad733c5b23555c609353841560b26bc; from 8f0541186e9ad1b62accc9519cc2b7a7240272a7 before d708a36634bb7b6f94d0e76d587d2ec50b2b93b5; 6e8f4abf584253cbaa596ea4ad13110cf61cd4c9; 8e33102309bd6839b2e2e158f93a7b378cb4655d; and 3 more ranges | CNA record |
References
- https://git.kernel.org/stable/c/f46a70a082bdbfecbe074af8a719c26c4deb58c6
- https://git.kernel.org/stable/c/86c2625fb9863139b359805fc6be1e31edbd3d65
- https://git.kernel.org/stable/c/edc17db83085624a2b1bacf6a4521d7f15571737
- https://git.kernel.org/stable/c/c3836f55e0dab96314774215e12d87f63fa919f2
- https://git.kernel.org/stable/c/6e6329322ad733c5b23555c609353841560b26bc
- https://git.kernel.org/stable/c/d708a36634bb7b6f94d0e76d587d2ec50b2b93b5
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.