CVE-2026-98261cifs: Fix server use-after-free in cifs_chan_skip_or_disable()
Updated under an hour ago ()
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It affects Linux. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.44%, higher than 37% of scored CVEs.
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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().
- CVSS
- 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.44% (percentile 37)
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 7, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 50e8363ecc85da49764781da90ebffe1a657b370 before 0338489960ddad6368bce55e8adbc176c523093d; from f591062bdbf4742b7f1622173017f19e927057b0 before edd52eae5fcfb8433b6bb0e7cd98db438fe01227; from f591062bdbf4742b7f1622173017f19e927057b0 before fcc0a935bb6e37ecbf7e4335061309f896f35780; from f591062bdbf4742b7f1622173017f19e927057b0 before 7a1b27780b113583a94256d58dabfe7c0d9286e7; from f591062bdbf4742b7f1622173017f19e927057b0 before 717e0a25036b6c92cecace30913b2d874a4c22b8; d61ba1d71ea6039eca7ada870bf3f0c3c8fc12e4; from 6.6.15 before 6.6.158; from 6.7.3 before 6.8 | CNA record |
References
- https://git.kernel.org/stable/c/0338489960ddad6368bce55e8adbc176c523093d
- https://git.kernel.org/stable/c/edd52eae5fcfb8433b6bb0e7cd98db438fe01227
- https://git.kernel.org/stable/c/fcc0a935bb6e37ecbf7e4335061309f896f35780
- https://git.kernel.org/stable/c/7a1b27780b113583a94256d58dabfe7c0d9286e7
- https://git.kernel.org/stable/c/717e0a25036b6c92cecace30913b2d874a4c22b8
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.