Skip to content
CVE PROGRAM SOURCE RECORD8.1 High

CVE-2026-98261

cifs: Fix server use-after-free in cifs_chan_skip_or_disable()

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix server use-after-free in cifs_chan_skip_or_disable() When a secondary channel is no longer supported by the server, cifs_chan_skip_or_disable() drops the channel reference with cifs_put_tcp_session() and then continues to use the server pointer by calling cifs_signal_cifsd_for_reconnect() on it and reading its primary_server pointer. cifs_put_tcp_session() can drop the last reference of the channel and tear it down, so both the channel and the primary server (whose reference is also dropped by cifs_put_tcp_session()) can be freed before they are signaled for reconnect. Signal the channel and the primary server and capture the primary server pointer before dropping the channel reference with cifs_put_tcp_session().

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 50e8363ecc85da49764781da90ebffe1a657b370 to < 0338489960ddad6368bce55e8adbc176c523093daffected
  • f591062bdbf4742b7f1622173017f19e927057b0 to < edd52eae5fcfb8433b6bb0e7cd98db438fe01227affected
  • f591062bdbf4742b7f1622173017f19e927057b0 to < fcc0a935bb6e37ecbf7e4335061309f896f35780affected
  • f591062bdbf4742b7f1622173017f19e927057b0 to < 7a1b27780b113583a94256d58dabfe7c0d9286e7affected
  • f591062bdbf4742b7f1622173017f19e927057b0 to < 717e0a25036b6c92cecace30913b2d874a4c22b8affected
  • d61ba1d71ea6039eca7ada870bf3f0c3c8fc12e4affected
  • 6.6.15 to < 6.6.158affected
  • 6.7.3 to < 6.8affected

Linux Linux

Default version status: affected

  • 6.8affected
  • 0 to < 6.8unaffected
  • 6.6.158 to ≤ 6.6.*unaffected
  • 6.12.112 to ≤ 6.12.*unaffected
  • 6.18.54 to ≤ 6.18.*unaffected
  • 7.2.8 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References