CVE-2026-64068 netfs: Fix missing locking around retry adding new subreqs

What is CVE-2026-64068?

CVE-2026-64068 is a critical vulnerability in Linux kernel, published on 19 Jul 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:

netfs: Fix missing locking around retry adding new subreqs

Fix netfs_retry_read_subrequests() and netfs_retry_write_stream() to take the appropriate lock when adding extra subrequests into stream->subrequests.

Weakness: CWE-667

Which versions are affected by CVE-2026-64068?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-64068?

Apply the vendor's patch.

Is CVE-2026-64068 being exploited?

There is no known exploitation of CVE-2026-64068 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-2026-64068, DEBIAN-CVE-2026-64068, GHSA-8vm6-jvf8-6w38, ROOT-OS-DEBIAN-13-CVE-2026-64068, UBUNTU-CVE-2026-64068.