CVE-2026-31612ksmbd: validate EaNameLength in smb2_get_ea()
Updated under an hour ago ()
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It affects Linux and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 before 859f11e1bc81a4d32bb3ceeae54bcd296ac675d3; from e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 before 4b73376feecb3b61172fe5b4ff42bbbb8531669d; from e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 before 551dfb15b182abad4600eaf7b37e6eb7000d5b1b; from e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 before 3363a770b193f555f29d76ddf4ced3305c0ccf6d; from e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 before 243b206bcb5a7137e8bddd57b2eec81e1ebd3859; from e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 before dfc6878d14acafffbe670bf2576620757a10a3d8; from e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 before 66751841212c2cc196577453c37f7774ff363f02 | CNA record |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | all versions | CISA ADP |
linux linux_kernel linux:linux_kernel | from 5.15 before 6.6.136; from 6.7 before 6.12.83; from 6.13 before 6.18.24; from 6.19 before 6.19.14; from 7.0 before 7.0.1 | NVD |
References
- https://git.kernel.org/stable/c/859f11e1bc81a4d32bb3ceeae54bcd296ac675d3
- https://git.kernel.org/stable/c/4b73376feecb3b61172fe5b4ff42bbbb8531669dpatch
- https://git.kernel.org/stable/c/551dfb15b182abad4600eaf7b37e6eb7000d5b1bpatch
- https://git.kernel.org/stable/c/3363a770b193f555f29d76ddf4ced3305c0ccf6dpatch
- https://git.kernel.org/stable/c/243b206bcb5a7137e8bddd57b2eec81e1ebd3859patch
- https://git.kernel.org/stable/c/dfc6878d14acafffbe670bf2576620757a10a3d8patch
- https://git.kernel.org/stable/c/66751841212c2cc196577453c37f7774ff363f02patch
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
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.