Answer in brief
CVE-2023-54085 records a High severity (CVSS 7.5) vulnerability in mptcp: fix NULL pointer dereference on fastopen early fallback. 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 7.5. 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 | >=36b122baf6a8bd46b4a591f12f4ed17b22257408 <95135835519b0ab931c39908b2c99e9fb3c9068b || >=36b122baf6a8bd46b4a591f12f4ed17b22257408 <c0ff6f6da66a7791a32c0234388b1bdc00244917 | 95135835519b0ab931c39908b2c99e9fb3c9068b, c0ff6f6da66a7791a32c0234388b1bdc00244917 |
| Linux/Linuxgeneric | 6.2 | Not reported |
Published upstream
Dec 24, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
In the Linux kernel, the following vulnerability has been resolved: mptcp: fix NULL pointer dereference on fastopen early fallback In case of early fallback to TCP, subflow_syn_recv_sock() deletes the subflow context before returning the newly allocated sock to the caller. The fastopen path does not cope with the above unconditionally dereferencing the subflow context.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2023-54085 records a High severity (CVSS 7.5) vulnerability in mptcp: fix NULL pointer dereference on fastopen early fallback. 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 7.5. 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 | >=36b122baf6a8bd46b4a591f12f4ed17b22257408 <95135835519b0ab931c39908b2c99e9fb3c9068b || >=36b122baf6a8bd46b4a591f12f4ed17b22257408 <c0ff6f6da66a7791a32c0234388b1bdc00244917 | 95135835519b0ab931c39908b2c99e9fb3c9068b, c0ff6f6da66a7791a32c0234388b1bdc00244917 |
| Linux/Linuxgeneric | 6.2 | Not reported |
Published upstream
Dec 24, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
In the Linux kernel, the following vulnerability has been resolved: mptcp: fix NULL pointer dereference on fastopen early fallback In case of early fallback to TCP, subflow_syn_recv_sock() deletes the subflow context before returning the newly allocated sock to the caller. The fastopen path does not cope with the above unconditionally dereferencing the subflow context.
Quoted source text, attributed separately from HOL analysis.