CVE-2023-3866
In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate session id and tree id in the compound request This patch validate session id and tree id in compound request.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 12.5%, higher than 96% of all known CVEs. Patch or mitigate before the next change window.
Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate session id and tree id in the compound request This patch validate session id and tree id in compound request. If first operation in the compound is SMB2 ECHO request, ksmbd bypass session and tree validation. So work->sess and work->tcon could be NULL. If secound request in the compound access work->sess or tcon, It cause NULL pointer dereferecing error.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 12.47% probability · 96th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
EPSS moved from 12.5% on 16 October 2026 to 12.5% on 1 November 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- https://git.kernel.org/stable/c/5005bcb4219156f1bf7587b185080ec1da08518ePatch
- https://git.kernel.org/stable/c/854156d12caa9d36de1cf5f084591c7686cc8a9dPatch
- https://git.kernel.org/stable/c/d1066c1b3663401cd23c0d6e60cdae750ce00c0fPatch
- https://git.kernel.org/stable/c/eb947403518ea3d93f6d89264bb1f5416bb0c7d0Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.