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CVE-2026-31609

smb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush()

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 6.18.24, 6.19.14, 7.0.1
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: yes
  • Technical impact: total

Summary

In the Linux kernel, the following vulnerability has been resolved: smb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush() smbd_send_batch_flush() already calls smbd_free_send_io(), so we should not call it again after smbd_post_send() moved it to the batch list.

Timeline

  1. CVE published
  2. CISA SSVC assessment

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

  3. Record last updated

Affected versions

  • Linux Linux

    From cca0526ef2344cab6944d7f441fc24e152da031b · fixed in a9940dcbe5cb92482c04efc7341039ddf7dbf607; From 37b5c06956183b65e6808b509cf637632016cdf7 · fixed in 22b7c1c619d808aec4cad3dc42103345e370d107; From 21538121efe6c8c5b51c742fa02cbe820bc48714 · fixed in f9a162c2bbcd0ac85bd07c5b37cf20286048b65c; From 21538121efe6c8c5b51c742fa02cbe820bc48714 · fixed in 27b7c3e916218b5eb2ee350211140e961bfc49be; From 6.18.11 · fixed in 6.18.24; From 6.19.1 · fixed in 6.19.14

  • Linux Linux

    7.0

  • KernelLinux

    fixed in 6.18.24; From 6.19.0 · fixed in 6.19.14; From 6.20.0 · fixed in 7.0.1

References 4

git.kernel.org