Answer in brief
CVE-2026-68097 records a High severity (CVSS 8.8) vulnerability in ksmbd: validate ACE size against SID sub-authorities. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b7cb5bf0855470799f12da825de91e48951b3876 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <62d80d7c2d9428085e7458ad4c06ca8c0984039b || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <337022d9dfac441c3b35e4455a51aa981996e02e || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <61fd3559199f7fa693dcbff35e59477e24af041a || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5152c6d49e3fd4e9f2e857c57527aead752f1f87 || >=0 <6.6.148 || >=0 <6.12.101 || >=0 <6.18.42 || >=0 <7.1.6 | b7cb5bf0855470799f12da825de91e48951b3876, 62d80d7c2d9428085e7458ad4c06ca8c0984039b, 337022d9dfac441c3b35e4455a51aa981996e02e, 61fd3559199f7fa693dcbff35e59477e24af041a, 5152c6d49e3fd4e9f2e857c57527aead752f1f87, 6.6.148, 6.12.101, 6.18.42, 7.1.6 |
| Linux/Linuxgeneric | >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <b7cb5bf0855470799f12da825de91e48951b3876 || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <62d80d7c2d9428085e7458ad4c06ca8c0984039b || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <337022d9dfac441c3b35e4455a51aa981996e02e || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <61fd3559199f7fa693dcbff35e59477e24af041a || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <5152c6d49e3fd4e9f2e857c57527aead752f1f87 | b7cb5bf0855470799f12da825de91e48951b3876, 62d80d7c2d9428085e7458ad4c06ca8c0984039b, 337022d9dfac441c3b35e4455a51aa981996e02e, 61fd3559199f7fa693dcbff35e59477e24af041a, 5152c6d49e3fd4e9f2e857c57527aead752f1f87 |
| Linux/Linuxgeneric | 5.15 | Not reported |
| Linux/Linuxgeneric | >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <5a2d9fe0e87c71baa0aaa1cfc1361892fcd1ece0 || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <b7cb5bf0855470799f12da825de91e48951b3876 || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <62d80d7c2d9428085e7458ad4c06ca8c0984039b || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <337022d9dfac441c3b35e4455a51aa981996e02e || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <61fd3559199f7fa693dcbff35e59477e24af041a || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <5152c6d49e3fd4e9f2e857c57527aead752f1f87 | 5a2d9fe0e87c71baa0aaa1cfc1361892fcd1ece0, b7cb5bf0855470799f12da825de91e48951b3876, 62d80d7c2d9428085e7458ad4c06ca8c0984039b, 337022d9dfac441c3b35e4455a51aa981996e02e, 61fd3559199f7fa693dcbff35e59477e24af041a, 5152c6d49e3fd4e9f2e857c57527aead752f1f87 |
Published upstream
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 10, 2026
In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate ACE size against SID sub-authorities set_ntacl_dacl() validates sid.num_subauth before copying an ACE, but does not verify that the declared ACE size contains all sub-authorities described by that field. An undersized ACE can therefore be copied and later make the POSIX ACL deduplication walk inspect data beyond the copied ACE boundary. The existing initial bound check is also too small. It only ensures that the ACE size field is accessible before set_ntacl_dacl() reads sid.num_subauth farther into the input buffer. Require enough input for the fixed SID header before accessing num_subauth, reject ACEs smaller than that header, and skip ACEs whose declared size cannot contain the complete SID. This makes the validation consistent with the other ACE walk paths.
Quoted source text, attributed separately from HOL analysis.