CVE-2026-46185

Description

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 v3.1 Score

9.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

EPSS — Exploit Prediction

0.0052

Probability of exploitation

0.40%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

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

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 9.1 (CRITICAL).

How severe is CVE-2026-46185? +

CVE-2026-46185 has a CVSS v3.1 score of 9.1 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0052, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-46185? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.