Strix
73K

CVE-2026-98854

UnknownEPSS 0.16%

Last modified

CVE-2026-98854 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: of/overlay: only treat a positive changeset id as registered of_overlay_fdt_apply() stores the idr_alloc() return value in ovcs->id before checking it. On failure the stored id is negative, free_overlay_changeset()'s "if (ovcs->id)" check passes, idr_remove() is called with a negative id and list_del() runs on ovcs->ovcs_list, which is not initialized until after the id allocation. EPSS estimates a 0.16% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: of/overlay: only treat a positive changeset id as registered of_overlay_fdt_apply() stores the idr_alloc() return value in ovcs->id before checking it. On failure the stored id is negative, free_overlay_changeset()'s "if (ovcs->id)" check passes, idr_remove() is called with a negative id and list_del() runs on ovcs->ovcs_list, which is not initialized until after the id allocation. An allocation failure at that point dereferences NULL. Make free_overlay_changeset() treat only a strict-positive id as registered. The rest of the function already copes with a partially-initialized ovcs, so the error path stays a plain goto err_free_ovcs.

Metrics

EPSS Probability
0.16%

4.7th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 61b4de4e0b384f4a22c55c3bada604da49cec4e1, < 7af5d66d0514b8f1d759d0e32b9d4c5d26263e4a; >= 61b4de4e0b384f4a22c55c3bada604da49cec4e1, < 71065f3d6864a101b77e7af84566757c4df415a0; >= 61b4de4e0b384f4a22c55c3bada604da49cec4e1, < cc688475c56d34a2b584141f9544cbe23360080d; >= 61b4de4e0b384f4a22c55c3bada604da49cec4e1, < c08a54df9d33dcd6ff089adc9434b2c008af3a39; >= 61b4de4e0b384f4a22c55c3bada604da49cec4e1, < 0d1525fdcd3355672b7485d61e55df6824ab5ad1; >= 61b4de4e0b384f4a22c55c3bada604da49cec4e1, < c875407c34dadaef0599834ad9c815f4c9f50d15; >= 61b4de4e0b384f4a22c55c3bada604da49cec4e1, < 44081d708b5b885487bac792db78324b7b4c267d
LinuxLinux4.15

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-98854?
In the Linux kernel, the following vulnerability has been resolved: of/overlay: only treat a positive changeset id as registered of_overlay_fdt_apply() stores the idr_alloc() return value in ovcs->id before checking it. On failure the stored id is negative, free_overlay_changeset()'s "if (ovcs->id)" check passes, idr_remove() is called with a negative id and list_del() runs on ovcs->ovcs_list, which is not initialized until after the id allocation. An allocation failure at that point dereferences NULL. Make free_overlay_changeset() treat only a strict-positive id as registered. The rest of the function already copes with a partially-initialized ovcs, so the error path stays a plain goto err_free_ovcs.
How severe is CVE-2026-98854?
Severity scoring for CVE-2026-98854 is pending analysis. The EPSS model estimates a 0.16% probability of exploitation in the next 30 days.
How do I fix CVE-2026-98854?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

Related CVEs from 2026

View all 2026CVEs →

Are you affected by CVE-2026-98854?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST