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CVE-2026-45972

smb: client: fix potential UAF and double free in smb2_open_file()

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 6.1.165, 6.6.128, 6.12.75, 6.18.14, 6.19.4
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: fix potential UAF and double free in smb2_open_file() Zero out @err_iov and @err_buftype before retrying SMB2_open() to prevent an UAF bug if @data != NULL, otherwise a double free.

Timeline

  1. CVE published
  2. CISA SSVC assessment

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

  3. Record last updated

Affected versions

  • Linux Linux

    From 743f70406264348c0830f38409eb6c40a42fb2db · fixed in 96e53bb3ee2f354cf6b4ab07bcc56e500f8b3f74; From 3a6d6b332f92990958602c1e35ce0173e2dd62e9 · fixed in 7425453ea16dbc3bbb0f6cac4d60b537e5e4d151; From b64e3b5d8d759dd4333992e4ba4dadf9359952c8 · fixed in 4d339b219004869e96c4ce56b8891f83a38da4c0; From 9ee608a64e37cea5b4b13e436c559dd0fb2ad1b5 · fixed in e66dcf7bb9c4df5582c82bc3582725abcbfbea73; From e3a43633023e3cacaca60d4b8972d084a2b06236 · fixed in 639deb962986ef2f5e2a6d5a600c66f922471e81; From e3a43633023e3cacaca60d4b8972d084a2b06236 · fixed in ebbbc4bfad4cb355d17c671223d0814ee3ef4eda; From 6.1.163 · fixed in 6.1.165; From 6.6.124 · fixed in 6.6.128; From 6.12.70 · fixed in 6.12.75; From 6.18.10 · fixed in 6.18.14

  • Linux Linux

    6.19

  • KernelLinux

    fixed in 6.1.165; From 6.2.0 · fixed in 6.6.128; From 6.7.0 · fixed in 6.12.75; From 6.13.0 · fixed in 6.18.14; From 6.19.0 · fixed in 6.19.4

References 6

git.kernel.org