Answer in brief
CVE-2026-31673 records a High severity (CVSS 7.8) vulnerability in af_unix: read UNIX_DIAG_VFS data under unix_state_lock. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (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 7.8. 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), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=5f7b0569460b7d8d01ca776430a00505a68b7584 <e7339db13b9ddb63417b12da55fd6191e59f7442 || >=5f7b0569460b7d8d01ca776430a00505a68b7584 <4f6a8f10182c3a9d22e8eb183957ae7ade9e4bf7 || >=5f7b0569460b7d8d01ca776430a00505a68b7584 <c3ec44ab4526bbc4b6c9fc845af86488244f4c9b || >=5f7b0569460b7d8d01ca776430a00505a68b7584 <b9232421a77a649c9376c99fdfc8cb7f79cad34c || >=5f7b0569460b7d8d01ca776430a00505a68b7584 <0c739f3785f84af695952c2bac8be2f45082c9b8 || >=5f7b0569460b7d8d01ca776430a00505a68b7584 <900a4e0910e98b8caef117d5df00471fa438dcf9 || >=5f7b0569460b7d8d01ca776430a00505a68b7584 <bdf206e740bf2919d818f132c8c9cc7ed91d11c0 || >=5f7b0569460b7d8d01ca776430a00505a68b7584 <39897df386376912d561d4946499379effa1e7ef | e7339db13b9ddb63417b12da55fd6191e59f7442, 4f6a8f10182c3a9d22e8eb183957ae7ade9e4bf7, c3ec44ab4526bbc4b6c9fc845af86488244f4c9b, b9232421a77a649c9376c99fdfc8cb7f79cad34c, 0c739f3785f84af695952c2bac8be2f45082c9b8, 900a4e0910e98b8caef117d5df00471fa438dcf9, bdf206e740bf2919d818f132c8c9cc7ed91d11c0, 39897df386376912d561d4946499379effa1e7ef |
| Linux/Linuxgeneric | 3.3 | Not reported |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
Published upstream
Apr 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 15, 2026
In the Linux kernel, the following vulnerability has been resolved: af_unix: read UNIX_DIAG_VFS data under unix_state_lock Exact UNIX diag lookups hold a reference to the socket, but not to u->path. Meanwhile, unix_release_sock() clears u->path under unix_state_lock() and drops the path reference after unlocking. Read the inode and device numbers for UNIX_DIAG_VFS while holding unix_state_lock(), then emit the netlink attribute after dropping the lock. This keeps the VFS data stable while the reply is being built.
Quoted source text, attributed separately from HOL analysis.