CVE-2026-23118
What it is
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.
At a glance
- Exploitability
- Can be exploited locally on the machine with a low-privilege account. High risk of service disruption.
- Exploit odds
- 0.1% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.1% in the next 30 days (EPSS).
- Severity: 4.7 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.1% · EPSS, next 30 days
- Weakness
- CWE-362 · Race condition
- Record status
- Modified
Affected
- Linux Kernel < 6.12.69
- Linux Kernel < 6.18.8
- Linux Kernel 6.19
Attack profile CVSS 3.1 · 4.7
- Attack vector
- Local
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Raw vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2026-23118.md and follow it. Check whether this project is affected by CVE-2026-23118. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://git.kernel.org/stable/c/5d5fe8bcd331f1e34e0943ec7c18432edfcf0e8b
- https://git.kernel.org/stable/c/c08cf314191cd0f8699089715efb9eff030f0086
- https://git.kernel.org/stable/c/f8cf1368e0a5491b27189a695c36f64e48f3d19d
References
- https://git.kernel.org/stable/c/49b8ef1abfe7713e15d9128006cb76e413b12b57
- https://git.kernel.org/stable/c/5d5fe8bcd331f1e34e0943ec7c18432edfcf0e8b
- https://git.kernel.org/stable/c/a426f29ac3fa3465093567ab763ada46762fb57c
- https://git.kernel.org/stable/c/c08cf314191cd0f8699089715efb9eff030f0086
- https://git.kernel.org/stable/c/f8cf1368e0a5491b27189a695c36f64e48f3d19d