Answer in brief
CVE-2026-46243 records a High severity (CVSS 7.1) vulnerability in smb: client: reject userspace cifs.spnego descriptions. 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-2026-46243 records a High severity (CVSS 7.1) vulnerability in smb: client: reject userspace cifs.spnego descriptions. 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 7.1. 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 | >=f1d662a7d5e5322e583aad6b3cfec03d8f27b435 <7713bd320ed4fc3d08a227cd8e41242219a16981 || >=f1d662a7d5e5322e583aad6b3cfec03d8f27b435 <9544559e59438a4b609b2fdfa0763d8360572824 || >=f1d662a7d5e5322e583aad6b3cfec03d8f27b435 <cf20038657d6d4974349556a34e08fe0490bebbc || >=f1d662a7d5e5322e583aad6b3cfec03d8f27b435 <2035acfb17221729b1b8ac335e941868a04ca079 || >=f1d662a7d5e5322e583aad6b3cfec03d8f27b435 <a3bbda6502a9398b816fa2e71c9a3f955f58013d || >=f1d662a7d5e5322e583aad6b3cfec03d8f27b435 <91f89c1d83e80417629791fcef6af8140d7d01c8 || >=f1d662a7d5e5322e583aad6b3cfec03d8f27b435 <0aece6685fc80a8de492688ca2315fb86ec379c7 || >=f1d662a7d5e5322e583aad6b3cfec03d8f27b435 <3da1fdf4efbc490041eb4f836bf596201203f8f2 | 7713bd320ed4fc3d08a227cd8e41242219a16981, 9544559e59438a4b609b2fdfa0763d8360572824, cf20038657d6d4974349556a34e08fe0490bebbc, 2035acfb17221729b1b8ac335e941868a04ca079, a3bbda6502a9398b816fa2e71c9a3f955f58013d, 91f89c1d83e80417629791fcef6af8140d7d01c8, 0aece6685fc80a8de492688ca2315fb86ec379c7, 3da1fdf4efbc490041eb4f836bf596201203f8f2 |
| Linux/Linuxgeneric | 2.6.24 | Not reported |
Published upstream
Jun 1, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 23, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 30, 2026
In the Linux kernel, the following vulnerability has been resolved: smb: client: reject userspace cifs.spnego descriptions cifs.spnego key descriptions contain authority-bearing fields such as pid, uid, creduid, and upcall_target that cifs.upcall treats as kernel-originating inputs. However, userspace can also create keys of this type through request_key(2) or add_key(2), allowing those fields to be supplied without CIFS origin. Only accept cifs.spnego descriptions while CIFS is using its private spnego_cred to request the key.
Quoted source text, attributed separately from HOL analysis.
CVSS is 7.1. 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 | >=f1d662a7d5e5322e583aad6b3cfec03d8f27b435 <7713bd320ed4fc3d08a227cd8e41242219a16981 || >=f1d662a7d5e5322e583aad6b3cfec03d8f27b435 <9544559e59438a4b609b2fdfa0763d8360572824 || >=f1d662a7d5e5322e583aad6b3cfec03d8f27b435 <cf20038657d6d4974349556a34e08fe0490bebbc || >=f1d662a7d5e5322e583aad6b3cfec03d8f27b435 <2035acfb17221729b1b8ac335e941868a04ca079 || >=f1d662a7d5e5322e583aad6b3cfec03d8f27b435 <a3bbda6502a9398b816fa2e71c9a3f955f58013d || >=f1d662a7d5e5322e583aad6b3cfec03d8f27b435 <91f89c1d83e80417629791fcef6af8140d7d01c8 || >=f1d662a7d5e5322e583aad6b3cfec03d8f27b435 <0aece6685fc80a8de492688ca2315fb86ec379c7 || >=f1d662a7d5e5322e583aad6b3cfec03d8f27b435 <3da1fdf4efbc490041eb4f836bf596201203f8f2 | 7713bd320ed4fc3d08a227cd8e41242219a16981, 9544559e59438a4b609b2fdfa0763d8360572824, cf20038657d6d4974349556a34e08fe0490bebbc, 2035acfb17221729b1b8ac335e941868a04ca079, a3bbda6502a9398b816fa2e71c9a3f955f58013d, 91f89c1d83e80417629791fcef6af8140d7d01c8, 0aece6685fc80a8de492688ca2315fb86ec379c7, 3da1fdf4efbc490041eb4f836bf596201203f8f2 |
| Linux/Linuxgeneric | 2.6.24 | Not reported |
Published upstream
Jun 1, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 23, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 30, 2026
In the Linux kernel, the following vulnerability has been resolved: smb: client: reject userspace cifs.spnego descriptions cifs.spnego key descriptions contain authority-bearing fields such as pid, uid, creduid, and upcall_target that cifs.upcall treats as kernel-originating inputs. However, userspace can also create keys of this type through request_key(2) or add_key(2), allowing those fields to be supplied without CIFS origin. Only accept cifs.spnego descriptions while CIFS is using its private spnego_cred to request the key.
Quoted source text, attributed separately from HOL analysis.