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CVE-2026-46027

net/smc: avoid early lgr access in smc_clc_wait_msg

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.86, and 2 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: yes
  • Technical impact: partial

Summary

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: yes · Technical impact: partial

  3. Record last updated

Affected versions

  • Linux Linux

    From 0cfdd8f92cac01afbb12e4500514036a2b78756b · fixed in 257cdf0c5ced9c0fba8aba501d94b0a5fcef2086; From 0cfdd8f92cac01afbb12e4500514036a2b78756b · fixed in 22546729b96fc873b23065dc49e3d73c45cfb874; From 0cfdd8f92cac01afbb12e4500514036a2b78756b · fixed in 5eedbfd82c2884e0010fdfb3c9446a6ebcadb691; From 0cfdd8f92cac01afbb12e4500514036a2b78756b · fixed in f0858e1d5624bb120b198f2a8528f97a9b0ae069; From 0cfdd8f92cac01afbb12e4500514036a2b78756b · fixed in 6180a296ca65b08a81914805cbc0f78da5f10a1f; From 0cfdd8f92cac01afbb12e4500514036a2b78756b · fixed in ea0b5d0fe96356dce38f98375a57c52a04e13712; From 0cfdd8f92cac01afbb12e4500514036a2b78756b · fixed in 83bcf9228b0501694fb2589ed1d142855a2887f2; From 0cfdd8f92cac01afbb12e4500514036a2b78756b · fixed in 5a8db80f721deee8e916c2cfdee78decda02ce4f

  • Linux Linux

    4.11

  • KernelLinux

    From 4.11.0 · fixed in 5.10.258; From 5.11.0 · fixed in 5.15.209; From 5.16.0 · fixed in 6.1.175; From 6.2.0 · fixed in 6.6.140; From 6.7.0 · fixed in 6.12.86; From 6.13.0 · fixed in 6.18.27; From 6.19.0 · fixed in 7.0.4

References 8

git.kernel.org