Critical 9.1Published May 28, 2026

CVE-2026-46185smb/client: fix out-of-bounds read in symlink_data()

Updated under an hour ago (Oct 27, 2026, 10:23 AM ET)

Does this affect you?

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.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Linux

Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: smb/client: fix out-of-bounds read in symlink_data() Since smb2_check_message() returns success without length validation for the symlink error response, in symlink_data() it is possible for iov->iov_len to be smaller than sizeof(struct smb2_err_rsp). If the buffer only contains the base SMB2 header (64 bytes), accessing err->ErrorContextCount (at offset 66) or err->ByteCount later in symlink_data() will cause an out-of-bounds read.

CVSS: 9.1 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Weakness (CWE): CWE-125
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 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	76894f3e2f71177747b8b4763fb180e800279585 builds before 2be11faf79e49fb8250a181ff0b4d2b2f084af83; from 76894f3e2f71177747b8b4763fb180e800279585 before ef6495d4df6e7af8f3de67e65150881c880f696c; 76894f3e2f71177747b8b4763fb180e800279585 builds before 15dc0a4de743a1aaa7b859b3aea79f08c695396c; from 76894f3e2f71177747b8b4763fb180e800279585 before b8c8a704f0bc133deb171f6aeb6f3a684203e212; from 76894f3e2f71177747b8b4763fb180e800279585 before b9561402489d41149f63e001a74384863b7b30a6; from 76894f3e2f71177747b8b4763fb180e800279585 before d62b8d236fab503c6fec1d3e9a38bea71feaca20; 2d046892a493d9760c35fdaefc3017f27f91b621; from 6.0.16 before 6.1	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 6.0.16 before 6.1.175; from 6.2 before 6.6.140; from 6.7 before 6.12.88; from 6.13 before 6.18.30; from 6.19 before 7.0.7; 7.1; 7.1	NVD

References

References

https://git.kernel.org/stable/c/2be11faf79e49fb8250a181ff0b4d2b2f084af83	patch
https://git.kernel.org/stable/c/ef6495d4df6e7af8f3de67e65150881c880f696c	patch
https://git.kernel.org/stable/c/15dc0a4de743a1aaa7b859b3aea79f08c695396c	patch
https://git.kernel.org/stable/c/b8c8a704f0bc133deb171f6aeb6f3a684203e212	patch
https://git.kernel.org/stable/c/b9561402489d41149f63e001a74384863b7b30a6	patch
https://git.kernel.org/stable/c/d62b8d236fab503c6fec1d3e9a38bea71feaca20	patch
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.