Answer in brief
CVE-2026-74436 records a Unknown severity vulnerability in rxrpc: serialize kernel accept preallocation with socket teardown. 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 | >=00e907127e6f86d0f9b122d9b4347a8aa09a8b61 <0337cdba0c477f176c0459bed012109453184573 || >=00e907127e6f86d0f9b122d9b4347a8aa09a8b61 <dfa0b2bbc5e50119f89c6b5407faa5ed86dfa7c5 || >=00e907127e6f86d0f9b122d9b4347a8aa09a8b61 <35a967ff8b24db09ee429c39c5b5e6571639997d || >=00e907127e6f86d0f9b122d9b4347a8aa09a8b61 <1741378a7a83dfd8e53a9196730df709b903cd33 || >=00e907127e6f86d0f9b122d9b4347a8aa09a8b61 <dc175389b18c29a5303ee83169ec653adfae3e17 | 0337cdba0c477f176c0459bed012109453184573, dfa0b2bbc5e50119f89c6b5407faa5ed86dfa7c5, 35a967ff8b24db09ee429c39c5b5e6571639997d, 1741378a7a83dfd8e53a9196730df709b903cd33, dc175389b18c29a5303ee83169ec653adfae3e17 |
| Linux/Linuxgeneric | 4.9 | Not reported |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
In the Linux kernel, the following vulnerability has been resolved: rxrpc: serialize kernel accept preallocation with socket teardown rxrpc_kernel_charge_accept() reads rx->backlog without any socket/backlog synchronization and passes that raw pointer into rxrpc_service_prealloc_one(). A concurrent rxrpc_discard_prealloc() sets rx->backlog = NULL and frees the backlog rings, so a kernel preallocation worker can keep using a freed struct rxrpc_backlog while updating *_backlog_head/tail and array slots. Serialize the state check and backlog lookup with the socket lock, and reject kernel preallocation once teardown has disabled listening or discarded the service backlog.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-74436 records a Unknown severity vulnerability in rxrpc: serialize kernel accept preallocation with socket teardown. 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 | >=00e907127e6f86d0f9b122d9b4347a8aa09a8b61 <0337cdba0c477f176c0459bed012109453184573 || >=00e907127e6f86d0f9b122d9b4347a8aa09a8b61 <dfa0b2bbc5e50119f89c6b5407faa5ed86dfa7c5 || >=00e907127e6f86d0f9b122d9b4347a8aa09a8b61 <35a967ff8b24db09ee429c39c5b5e6571639997d || >=00e907127e6f86d0f9b122d9b4347a8aa09a8b61 <1741378a7a83dfd8e53a9196730df709b903cd33 || >=00e907127e6f86d0f9b122d9b4347a8aa09a8b61 <dc175389b18c29a5303ee83169ec653adfae3e17 | 0337cdba0c477f176c0459bed012109453184573, dfa0b2bbc5e50119f89c6b5407faa5ed86dfa7c5, 35a967ff8b24db09ee429c39c5b5e6571639997d, 1741378a7a83dfd8e53a9196730df709b903cd33, dc175389b18c29a5303ee83169ec653adfae3e17 |
| Linux/Linuxgeneric | 4.9 | Not reported |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
In the Linux kernel, the following vulnerability has been resolved: rxrpc: serialize kernel accept preallocation with socket teardown rxrpc_kernel_charge_accept() reads rx->backlog without any socket/backlog synchronization and passes that raw pointer into rxrpc_service_prealloc_one(). A concurrent rxrpc_discard_prealloc() sets rx->backlog = NULL and frees the backlog rings, so a kernel preallocation worker can keep using a freed struct rxrpc_backlog while updating *_backlog_head/tail and array slots. Serialize the state check and backlog lookup with the socket lock, and reject kernel preallocation once teardown has disabled listening or discarded the service backlog.
Quoted source text, attributed separately from HOL analysis.