Answer in brief
CVE-2026-43350 records a High severity (CVSS 7.6) vulnerability in smb: client: require a full NFS mode SID before reading mode bits. The current sources do not mark it as known exploited. The current feed maps 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.
Answer in brief
CVE-2026-43350 records a High severity (CVSS 7.6) vulnerability in smb: client: require a full NFS mode SID before reading mode bits. The current sources do not mark it as known exploited. The current feed maps 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 7.6. 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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=e2f8fbfb8d09c06decde162090fac3ee220aa280 <23b54d6cc3ef30a51d984dc74364f24039ae2ecb || >=e2f8fbfb8d09c06decde162090fac3ee220aa280 <1592a6cd6f653f2d24572a6976c7a775b19f4940 || >=e2f8fbfb8d09c06decde162090fac3ee220aa280 <8bd4cad3f458d11650d51c2d24b03fb1770ae6cc || >=e2f8fbfb8d09c06decde162090fac3ee220aa280 <b53b8e98c23310294fc45fc686db5ee860311896 || >=e2f8fbfb8d09c06decde162090fac3ee220aa280 <c8eef12af1cc73031639ea7cf16e0b10e2536b0b || >=e2f8fbfb8d09c06decde162090fac3ee220aa280 <38a69f08ee82c450d3e4168707fff2e317dc3ff7 || >=e2f8fbfb8d09c06decde162090fac3ee220aa280 <f8488c07bea2431ee12a6067d736578064fa46b4 || >=e2f8fbfb8d09c06decde162090fac3ee220aa280 <2757ad3e4b6f9e0fed4c7739594e702abc5cab21 | 23b54d6cc3ef30a51d984dc74364f24039ae2ecb, 1592a6cd6f653f2d24572a6976c7a775b19f4940, 8bd4cad3f458d11650d51c2d24b03fb1770ae6cc, b53b8e98c23310294fc45fc686db5ee860311896, c8eef12af1cc73031639ea7cf16e0b10e2536b0b, 38a69f08ee82c450d3e4168707fff2e317dc3ff7, f8488c07bea2431ee12a6067d736578064fa46b4, 2757ad3e4b6f9e0fed4c7739594e702abc5cab21 |
| Linux/Linuxgeneric | 5.4 | Not reported |
Published upstream
May 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
In the Linux kernel, the following vulnerability has been resolved: smb: client: require a full NFS mode SID before reading mode bits parse_dacl() treats an ACE SID matching sid_unix_NFS_mode as an NFS mode SID and reads sid.sub_auth[2] to recover the mode bits. That assumes the ACE carries three subauthorities, but compare_sids() only compares min(a, b) subauthorities. A malicious server can return an ACE with num_subauth = 2 and sub_auth[] = {88, 3}, which still matches sid_unix_NFS_mode and then drives the sub_auth[2] read four bytes past the end of the ACE. Require num_subauth >= 3 before treating the ACE as an NFS mode SID. This keeps the fix local to the special-SID mode path without changing compare_sids() semantics for the rest of cifsacl.
Quoted source text, attributed separately from HOL analysis.
CVSS is 7.6. 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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=e2f8fbfb8d09c06decde162090fac3ee220aa280 <23b54d6cc3ef30a51d984dc74364f24039ae2ecb || >=e2f8fbfb8d09c06decde162090fac3ee220aa280 <1592a6cd6f653f2d24572a6976c7a775b19f4940 || >=e2f8fbfb8d09c06decde162090fac3ee220aa280 <8bd4cad3f458d11650d51c2d24b03fb1770ae6cc || >=e2f8fbfb8d09c06decde162090fac3ee220aa280 <b53b8e98c23310294fc45fc686db5ee860311896 || >=e2f8fbfb8d09c06decde162090fac3ee220aa280 <c8eef12af1cc73031639ea7cf16e0b10e2536b0b || >=e2f8fbfb8d09c06decde162090fac3ee220aa280 <38a69f08ee82c450d3e4168707fff2e317dc3ff7 || >=e2f8fbfb8d09c06decde162090fac3ee220aa280 <f8488c07bea2431ee12a6067d736578064fa46b4 || >=e2f8fbfb8d09c06decde162090fac3ee220aa280 <2757ad3e4b6f9e0fed4c7739594e702abc5cab21 | 23b54d6cc3ef30a51d984dc74364f24039ae2ecb, 1592a6cd6f653f2d24572a6976c7a775b19f4940, 8bd4cad3f458d11650d51c2d24b03fb1770ae6cc, b53b8e98c23310294fc45fc686db5ee860311896, c8eef12af1cc73031639ea7cf16e0b10e2536b0b, 38a69f08ee82c450d3e4168707fff2e317dc3ff7, f8488c07bea2431ee12a6067d736578064fa46b4, 2757ad3e4b6f9e0fed4c7739594e702abc5cab21 |
| Linux/Linuxgeneric | 5.4 | Not reported |
Published upstream
May 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
In the Linux kernel, the following vulnerability has been resolved: smb: client: require a full NFS mode SID before reading mode bits parse_dacl() treats an ACE SID matching sid_unix_NFS_mode as an NFS mode SID and reads sid.sub_auth[2] to recover the mode bits. That assumes the ACE carries three subauthorities, but compare_sids() only compares min(a, b) subauthorities. A malicious server can return an ACE with num_subauth = 2 and sub_auth[] = {88, 3}, which still matches sid_unix_NFS_mode and then drives the sub_auth[2] read four bytes past the end of the ACE. Require num_subauth >= 3 before treating the ACE as an NFS mode SID. This keeps the fix local to the special-SID mode path without changing compare_sids() semantics for the rest of cifsacl.
Quoted source text, attributed separately from HOL analysis.