CVE-2026-46185

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.

Score

CVSS 3.1 9.1 Critical

Status

Modified - 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-05-28

Last modified

2026-10-19

Weaknesses

CWE-125

Affected products

• Linux Kernel (Linux)
• Simatic S7-1500 Tm Mfp - Gnulinux Subsystem (Siemens)

References

• https://git.kernel.org/stable/c/2be11faf79e49fb8250a181ff0b4d2b2f084af83
• https://git.kernel.org/stable/c/ef6495d4df6e7af8f3de67e65150881c880f696c
• https://git.kernel.org/stable/c/15dc0a4de743a1aaa7b859b3aea79f08c695396c
• https://git.kernel.org/stable/c/b8c8a704f0bc133deb171f6aeb6f3a684203e212
• https://git.kernel.org/stable/c/b9561402489d41149f63e001a74384863b7b30a6
• https://git.kernel.org/stable/c/d62b8d236fab503c6fec1d3e9a38bea71feaca20
• https://cert-portal.siemens.com/productcert/html/ssa-784472.html