CVE-2026-46027
Published: May 28, 2026Last modified: June 2, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: net/smc: avoid early lgr access in smc_clc_wait_msg A CLC decline can be received while the handshake is still in an early stage, before the connection has been associated with a link group. The decline handling in smc_clc_wait_msg() updates link-group level sync state for first-contact declines, but that state only exists after link group setup has completed. Guard the link-group update accordingly and keep the per-socket peer diagnosis handling unchanged. This preserves the existing sync_err handling for established link-group contexts and avoids touching link-group state before it is available.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack Vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.175-r0) |
| 25 LTS | linux-lts | Fixed (6.12.87-r0) | |
| Stream | linux-lts | Fixed (6.12.87-r0) |
References
- https://git.kernel.org/stable/c/22546729b96fc873b23065dc49e3d73c45cfb874
- https://git.kernel.org/stable/c/257cdf0c5ced9c0fba8aba501d94b0a5fcef2086
- https://git.kernel.org/stable/c/5a8db80f721deee8e916c2cfdee78decda02ce4f
- https://git.kernel.org/stable/c/5eedbfd82c2884e0010fdfb3c9446a6ebcadb691
- https://git.kernel.org/stable/c/6180a296ca65b08a81914805cbc0f78da5f10a1f
- https://git.kernel.org/stable/c/83bcf9228b0501694fb2589ed1d142855a2887f2
- https://git.kernel.org/stable/c/ea0b5d0fe96356dce38f98375a57c52a04e13712
- https://git.kernel.org/stable/c/f0858e1d5624bb120b198f2a8528f97a9b0ae069