CVE-2026-64005 net/smc: Do not re-initialize smc hashtables

What is CVE-2026-64005?

CVE-2026-64005 is a high-severity vulnerability in Linux kernel, published on 19 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In the Linux kernel, the following vulnerability has been resolved:

net/smc: Do not re-initialize smc hashtables

INIT_HLIST_HEAD(&smc_v*_hashinfo.ht) are called after smc_nl_init(), proto_register() and sock_register(). This can lead to smc_v*_hashinfo.ht being reset even though hash entries already exist and are being used, possibly resulting in a corrupted list.

Remove unnecessary and dangerous re-initialisation of smc_v*_hashinfo.ht in smc_init(); it is implicitly initialised to zero anyhow. Add HLIST_HEAD_INIT to the definitions for clarity.

Weakness: CWE-667, CWE-662

Which versions are affected by CVE-2026-64005?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-64005?

Apply the vendor's patch.

Is CVE-2026-64005 being exploited?

There is no known exploitation of CVE-2026-64005 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 BELL-CVE-2026-64005, DEBIAN-CVE-2026-64005, GHSA-hrwp-cv9c-vc93, ROOT-OS-UBUNTU-2204-CVE-2026-64005, UBUNTU-CVE-2026-64005.