Out-of-bounds read in Linux kernel - CVE-2026-97565

Vulnerability details

The vulnerability allows a remote attacker to cause an out-of-bounds read.

The vulnerability exists due to an out-of-bounds read in CIFSSMBRead() when processing a short READ_RSP from an SMB1 server. A remote attacker can return a short READ_RSP to cause an out-of-bounds read.

Exploitation requires an explicit SMB1 mount using vers=1.0, because SMB1 is not negotiated by default.

Affected software

How to mitigate CVE-2026-97565

External References

• https://git.kernel.org/stable/c/0f1f77b821506a4dacab6ce7d29cf9e0c26f14cd
• https://git.kernel.org/stable/c/aaa221c1b1d288845b55e9c366e5ef608dfff49d
• https://git.kernel.org/stable/c/e6142a8bfc230c7263eb8b0475249c958ce49367

Related Security Bulletins

• Out-of-bounds read in Linux kernel smb client