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

What is CVE-2026-46185?

CVE-2026-46185 is a critical vulnerability in Linux kernel, published on 28 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-125

Which versions are affected by CVE-2026-46185?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-46185?

Apply the vendor's patch.

Is CVE-2026-46185 being exploited?

There is no known exploitation of CVE-2026-46185 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-89042, BELL-CVE-2026-46185, DEBIAN-CVE-2026-46185, GHSA-89gf-r4q6-p3c9, ROOT-OS-DEBIAN-12-CVE-2026-46185, ROOT-OS-UBUNTU-2404-CVE-2026-46185 and 1 more.