CVE-2026-98174smb: client: fix rlist race and missing initialization
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 0.36%, higher than 29% of scored CVEs.
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In the Linux kernel, the following vulnerability has been resolved: smb: client: fix rlist race and missing initialization TCP_Server_Info.rlist is allocated via kzalloc which zeros both ->next and ->prev to NULL instead of pointing to itself, making list_empty() always return false and list_add() dereference a NULL ->prev pointer. Also, cifs_signal_cifsd_for_reconnect() can be called concurrently from multiple cifsd threads, allowing the same server's rlist node to be added twice into the local list, corrupting it.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:R/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)
- 0.36% (percentile 29)
- 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 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before b5f924ffbfa976e4b97f17e8132c595b97482c2d; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 5a8f82f9c5839389cf4036029dd75a9911049e83; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 04082b1833856cb9ed87e0d3d5f04cbf836cf7da; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before c037d6bde3dd5fa00b017b6b98a5389ec0ebc02f; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 5f270f091256da1338c3631083e15d7f83cc05e1; before 6.6.158; before 6.12.112; before 6.18.54; and 1 more ranges | CNA record |
References
- https://git.kernel.org/stable/c/b5f924ffbfa976e4b97f17e8132c595b97482c2d
- https://git.kernel.org/stable/c/5a8f82f9c5839389cf4036029dd75a9911049e83
- https://git.kernel.org/stable/c/04082b1833856cb9ed87e0d3d5f04cbf836cf7da
- https://git.kernel.org/stable/c/c037d6bde3dd5fa00b017b6b98a5389ec0ebc02f
- https://git.kernel.org/stable/c/5f270f091256da1338c3631083e15d7f83cc05e1
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.