CVE-2026-23118
Description
A data race flaw was found in the Linux kernel's RxRPC protocol implementation. The last_tx_at field is accessed without proper synchronization between rxrpc_peer_keepalive_worker() and rxrpc_send_data_packet(). Additionally, on 32-bit architectures, the 64-bit last_tx_at value can experience load/store tearing. The fix changes the field to an unsigned int to prevent tearing and silence the KCSAN warning.
Statement
The data race has minimal practical impact as the last_tx_at value is only used for approximate keepalive timing decisions, not security-critical operations. An incorrect read would at worst cause a slightly early or late keepalive packet. The fix primarily addresses KCSAN warnings and theoretical tearing on 32-bit systems.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 3.3 | 4.7 | N/A |
| Attack Vector | Local | Local | N/A |
| Attack Complexity | Low | High | N/A |
| Privileges Required | Low | Low | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | None | None | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | Low | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
NVD: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Understanding the Weakness (CWE)
Integrity,Confidentiality,Other
Technical Impact: Modify Application Data; Read Application Data; Alter Execution Logic
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