CVE-2026-31612
What it is
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.
At a glance
- Exploitability
- Can be exploited over the network without logging in. High risk of data exposure.
- Exploit odds
- 0.4% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.4% in the next 30 days (EPSS).
- Severity: 7.5 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.4% · EPSS, next 30 days
- Record status
- Modified
Affected
- Linux Kernel < 6.6.136
- Linux Kernel < 6.12.83
- Linux Kernel < 6.18.24
- Linux Kernel < 6.19.14
- Linux Kernel < 7.0.1
Attack profile CVSS 3.1 · 7.5
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2026-31612.md and follow it. Check whether this project is affected by CVE-2026-31612. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://git.kernel.org/stable/c/243b206bcb5a7137e8bddd57b2eec81e1ebd3859
- https://git.kernel.org/stable/c/3363a770b193f555f29d76ddf4ced3305c0ccf6d
- https://git.kernel.org/stable/c/4b73376feecb3b61172fe5b4ff42bbbb8531669d
- https://git.kernel.org/stable/c/551dfb15b182abad4600eaf7b37e6eb7000d5b1b
- https://git.kernel.org/stable/c/66751841212c2cc196577453c37f7774ff363f02
- https://git.kernel.org/stable/c/dfc6878d14acafffbe670bf2576620757a10a3d8
References
- https://git.kernel.org/stable/c/243b206bcb5a7137e8bddd57b2eec81e1ebd3859
- https://git.kernel.org/stable/c/3363a770b193f555f29d76ddf4ced3305c0ccf6d
- https://git.kernel.org/stable/c/4b73376feecb3b61172fe5b4ff42bbbb8531669d
- https://git.kernel.org/stable/c/551dfb15b182abad4600eaf7b37e6eb7000d5b1b
- https://git.kernel.org/stable/c/66751841212c2cc196577453c37f7774ff363f02
- https://git.kernel.org/stable/c/859f11e1bc81a4d32bb3ceeae54bcd296ac675d3
- https://git.kernel.org/stable/c/dfc6878d14acafffbe670bf2576620757a10a3d8
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html