What is CVE-2026-89878?

CVE-2026-89878 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 2.6.28 onward and patched in 5.10.270, 5.15.221, 6.1.188 and others. CVE-2026-89878 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-89878?

CVE-2026-89878 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2026-89878?

Yes, CVE-2026-89878 has been patched. Fixed versions include 5.10.270, 5.15.221, 6.1.188 and others. If you are running Linux kernel 2.6.28 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-89878 actively exploited?

CVE-2026-89878 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-89878

In the Linux kernel, the following vulnerability has been resolved: media: s2255: check firmware size before reading trailing marker s2255_probe() reads a 4-byte marker and version from the last 8 bytes of the firmware blob (fw->data[fw_size - 8] and [fw_size - 4]). If the firmware file is shorter than 8 bytes, fw_size - 8 underflows and the access reads out of bounds. Validate the firmware size before indexing.

Package Linux Kernel

Published 2026-09-16

Last modified 2026-09-16

Patch available

Yes

Affected versions

Linux kernel versions 2.6.28 and later are affected. Fixed in 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.51, 7.2.5, 7.3-rc1 and their respective stable series.

Affected from

≥ 2.6.28

Fixed in

✓ 5.10.270 5.10.x ✓ 5.15.221 5.15.x ✓ 6.1.188 6.1.x ✓ 6.6.157 6.6.x ✓ 6.12.110 6.12.x ✓ 6.18.51 6.18.x ✓ 7.2.5 7.2.x ✓ 7.3-rc1

References

8 total

Showing 5 of 8 references View all on NVD

Frequently asked questions

What is CVE-2026-89878?

CVE-2026-89878 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 2.6.28 onward and has been patched in 5.10.270, 5.15.221, 6.1.188 and others. CVE-2026-89878 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2026-89878?

Yes. CVE-2026-89878 has been patched. Fixed versions include 5.10.270, 5.15.221, 6.1.188 and others. If you are running Linux kernel 2.6.28 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-89878 actively exploited?

No. CVE-2026-89878 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.