rxrpc: Fix the reception of a reply packet before data transmission (CVE-2026-74429) | HOL Guard CVE

High · CVSS 7.5CVE-2026-74429

rxrpc: Fix the reception of a reply packet before data transmission

Answer in brief

CVE-2026-74429 records a High severity (CVSS 7.5) vulnerability in rxrpc: Fix the reception of a reply packet before data transmission. 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.

Published Aug 15, 2026Updated Aug 17, 2026Source checked Sep 29, 2026First seen by HOL Aug 15, 2026Material review Aug 17, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.5
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

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.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=b341a0263b1b804d329f864c2dc24815364510ec <f9be514984471ff0003738b2e1efed12bc3433ff \|\| >=b341a0263b1b804d329f864c2dc24815364510ec <e220ae559e5a0fc33e41ec6a348ea50387cb8b0f \|\| >=b341a0263b1b804d329f864c2dc24815364510ec <a58e33405acd2584e730c1da72635f822ada6b49	f9be514984471ff0003738b2e1efed12bc3433ff, e220ae559e5a0fc33e41ec6a348ea50387cb8b0f, a58e33405acd2584e730c1da72635f822ada6b49
Linux/Linuxgeneric	6.14	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to f9be514984471ff0003738b2e1efed12bc3433ff if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 15, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix the reception of a reply packet before data transmission Fix rxrpc_receiving_reply() to handle the reception of an apparent reply DATA packet before rxrpc has had a chance to send any request DATA packets on a client call by checking to see if the call has been exposed yet by sending the first packet. Without this, rxrpc_rotate_tx_window() might oops. Also fix rxrpc_rotate_tx_window() to handle the Tx queue being empty by changing the do...while loop into a while loop, just in case a call is abnormally terminated by an early reply before the last request packet is transmitted.

Quoted source text, attributed separately from HOL analysis.