What is CVE-2026-72437?

CVE-2026-72437 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 5.17 onward and patched in 6.1.178, 6.6.145, 6.12.97 and others. CVE-2026-72437 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-72437?

CVE-2026-72437 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2026-72437?

Yes, CVE-2026-72437 has been patched. Fixed versions include 6.1.178, 6.6.145, 6.12.97 and others. If you are running Linux kernel 5.17 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-72437 actively exploited?

CVE-2026-72437 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-72437

In the Linux kernel, the following vulnerability has been resolved: md/raid1: free r1_bio when REQ_NOWAIT is set and read would block on retry When a read is retried, raid1_read_request() may be called with a pre-allocated r1_bio. If wait_read_barrier() fails for a REQ_NOWAIT read, the bio is completed and the function returns immediately. In this case the existing r1_bio is leaked. This fixes a leak of pre-allocated r1_bio structures for retried reads.

Package Linux Kernel

Published 2026-08-15

Last modified 2026-08-15

Patch available

Yes

Affected versions

Linux kernel versions 5.17 and later are affected. Fixed in 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5, 7.2-rc1 and their respective stable series.

Affected from

≥ 5.17

Fixed in

✓ 6.1.178 6.1.x ✓ 6.6.145 6.6.x ✓ 6.12.97 6.12.x ✓ 6.18.40 6.18.x ✓ 7.1.5 7.1.x ✓ 7.2-rc1

References

6 total

Showing 5 of 6 references View all on NVD

Frequently asked questions

What is CVE-2026-72437?

CVE-2026-72437 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.17 onward and has been patched in 6.1.178, 6.6.145, 6.12.97 and others. CVE-2026-72437 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2026-72437?

Yes. CVE-2026-72437 has been patched. Fixed versions include 6.1.178, 6.6.145, 6.12.97 and others. If you are running Linux kernel 5.17 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-72437 actively exploited?

No. CVE-2026-72437 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.