CVE-2026-46185smb/client: fix out-of-bounds read in symlink_data()
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: 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)
- 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 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
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
- https://git.kernel.org/stable/c/2be11faf79e49fb8250a181ff0b4d2b2f084af83patch
- https://git.kernel.org/stable/c/ef6495d4df6e7af8f3de67e65150881c880f696cpatch
- https://git.kernel.org/stable/c/15dc0a4de743a1aaa7b859b3aea79f08c695396cpatch
- https://git.kernel.org/stable/c/b8c8a704f0bc133deb171f6aeb6f3a684203e212patch
- https://git.kernel.org/stable/c/b9561402489d41149f63e001a74384863b7b30a6patch
- https://git.kernel.org/stable/c/d62b8d236fab503c6fec1d3e9a38bea71feaca20patch
- 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.