Answer in brief
CVE-2026-43215 records a Unknown severity vulnerability in cifs: Fix locking usage for tcon fields. 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.
A CVSS score is not reported in the current record. 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 | >=d7d7a66aacd6fd8ca57baf08a7bac5421282f6f8 <953953abb66e52c224057ab91e404284fefeab62 || >=d7d7a66aacd6fd8ca57baf08a7bac5421282f6f8 <601dd3b79769b38d30b693c40afdb2a4b7edf9d0 || >=d7d7a66aacd6fd8ca57baf08a7bac5421282f6f8 <3969db6b22e3d90d8c5f22ac1a7fe0350a94c136 || >=d7d7a66aacd6fd8ca57baf08a7bac5421282f6f8 <8c59eeeeffa1524ef57e173a89a1a3ff539888d5 || >=d7d7a66aacd6fd8ca57baf08a7bac5421282f6f8 <96c4af418586ee9a6aab61738644366426e05316 | 953953abb66e52c224057ab91e404284fefeab62, 601dd3b79769b38d30b693c40afdb2a4b7edf9d0, 3969db6b22e3d90d8c5f22ac1a7fe0350a94c136, 8c59eeeeffa1524ef57e173a89a1a3ff539888d5, 96c4af418586ee9a6aab61738644366426e05316 |
| Linux/Linuxgeneric | 6.0 | Not reported |
Published upstream
May 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: cifs: Fix locking usage for tcon fields We used to use the cifs_tcp_ses_lock to protect a lot of objects that are not just the server, ses or tcon lists. We later introduced srv_lock, ses_lock and tc_lock to protect fields within the corresponding structs. This was done to provide a more granular protection and avoid unnecessary serialization. There were still a couple of uses of cifs_tcp_ses_lock to provide tcon fields. In this patch, I've replaced them with tc_lock.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-43215 records a Unknown severity vulnerability in cifs: Fix locking usage for tcon fields. 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.
A CVSS score is not reported in the current record. 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 | >=d7d7a66aacd6fd8ca57baf08a7bac5421282f6f8 <953953abb66e52c224057ab91e404284fefeab62 || >=d7d7a66aacd6fd8ca57baf08a7bac5421282f6f8 <601dd3b79769b38d30b693c40afdb2a4b7edf9d0 || >=d7d7a66aacd6fd8ca57baf08a7bac5421282f6f8 <3969db6b22e3d90d8c5f22ac1a7fe0350a94c136 || >=d7d7a66aacd6fd8ca57baf08a7bac5421282f6f8 <8c59eeeeffa1524ef57e173a89a1a3ff539888d5 || >=d7d7a66aacd6fd8ca57baf08a7bac5421282f6f8 <96c4af418586ee9a6aab61738644366426e05316 | 953953abb66e52c224057ab91e404284fefeab62, 601dd3b79769b38d30b693c40afdb2a4b7edf9d0, 3969db6b22e3d90d8c5f22ac1a7fe0350a94c136, 8c59eeeeffa1524ef57e173a89a1a3ff539888d5, 96c4af418586ee9a6aab61738644366426e05316 |
| Linux/Linuxgeneric | 6.0 | Not reported |
Published upstream
May 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: cifs: Fix locking usage for tcon fields We used to use the cifs_tcp_ses_lock to protect a lot of objects that are not just the server, ses or tcon lists. We later introduced srv_lock, ses_lock and tc_lock to protect fields within the corresponding structs. This was done to provide a more granular protection and avoid unnecessary serialization. There were still a couple of uses of cifs_tcp_ses_lock to provide tcon fields. In this patch, I've replaced them with tc_lock.
Quoted source text, attributed separately from HOL analysis.