CVE-2026-31612
In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate EaNameLength in smb2_get_ea() smb2_get_ea() reads ea_req->EaNameLength from the client request and passes it directly to strncmp() as the comparison length without…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.41%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate EaNameLength in smb2_get_ea() smb2_get_ea() reads ea_req->EaNameLength from the client request and passes it directly to strncmp() as the comparison length without verifying that the length of the name really is the size of the input buffer received. Fix this up by properly checking the size of the name based on the value received and the overall size of the request, to prevent a later strncmp() call to use the length as a "trusted" size of the buffer. Without this check, uninitialized heap values might be slowly leaked to the client.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 0.41% probability · 35th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/243b206bcb5a7137e8bddd57b2eec81e1ebd3859Patch
- https://git.kernel.org/stable/c/3363a770b193f555f29d76ddf4ced3305c0ccf6dPatch
- https://git.kernel.org/stable/c/4b73376feecb3b61172fe5b4ff42bbbb8531669dPatch
- https://git.kernel.org/stable/c/551dfb15b182abad4600eaf7b37e6eb7000d5b1bPatch
- https://git.kernel.org/stable/c/66751841212c2cc196577453c37f7774ff363f02Patch
- https://git.kernel.org/stable/c/859f11e1bc81a4d32bb3ceeae54bcd296ac675d3
- https://git.kernel.org/stable/c/dfc6878d14acafffbe670bf2576620757a10a3d8Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.