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CVE-2026-64593

Published Aug 6, 2026 EPSS 0.17% (6th pctl)

Overview

CVE-2026-64593 is a known-severity vulnerability. It was published on August 6, 2026.

Technical Description

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

btrfs: do not trim a device which is not writeable

[BUG]

There is a bug report that btrfs/242 can randomly fail with the

following NULL pointer dereference:

run fstests btrfs/242 at 2026-06-01 10:25:08

BTRFS: device fsid d4d7f234-487c-4787-88e4-47a8b68c9874 devid 1 transid 9 /dev/sdc (8:32) scanned by mount (122609)

BTRFS info (device sdc): first mount of filesystem d4d7f234-487c-4787-88e4-47a8b68c9874

BTRFS info (device sdc): using crc32c checksum algorithm

BTRFS warning (device sdc): devid 2 uuid fbe72d72-3272-482d-80fb-ab88ed398192 is missing

BTRFS warning (device sdc): devid 2 uuid fbe72d72-3272-482d-80fb-ab88ed398192 is missing

BTRFS info (device sdc): allowing degraded mounts

BTRFS info (device sdc): turning on async discard

BTRFS info (device sdc): enabling free space tree

Unable to handle kernel NULL pointer dereference at virtual address 0000000000000018

user pgtable: 4k pages, 48-bit

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Ref git.kernel.org/stable/c/02c903fc6fc7e16c5d1f22d18784f1208acf43e3 Ref git.kernel.org/stable/c/1b1937eb08f51319bf71575484cde2b8c517aedc Ref git.kernel.org/stable/c/210af872eafa0cf572a84cb303c0f9d2914c1226 Ref git.kernel.org/stable/c/3d8fa4b828a86b33c60858e58aaab6df273ede05 Ref git.kernel.org/stable/c/7a64521802997257b144e6edfb4e278dbeb972dd Ref git.kernel.org/stable/c/9c894159c5b8adc84072e3af0e55b0473a69564e Ref git.kernel.org/stable/c/b4af31b898a948e29861cb0bae734058f9a49d9b Ref git.kernel.org/stable/c/f41ae7e6664f3c4361129728f2c4d5f3ed995251

Frequently Asked Questions

What is CVE-2026-64593?

CVE-2026-64593 is a known-severity vulnerability. It was published on August 6, 2026.

How severe is CVE-2026-64593?

CVSS score information is not yet available for this vulnerability. Check back as the CVE record is updated by NVD analysts.

How do I fix or remediate CVE-2026-64593?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-64593?

CyberStrike's AI-powered security agents can automatically detect CVE-2026-64593 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.

How CyberStrike Helps

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