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CVE-2026-98868

Unknown

Last modified

CVE-2026-98868 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: dm-pcache: reject a kset that overruns its segment cache_replay(), the writeback worker and the GC worker read a kset of get_kset_onmedia_size() bytes and advance the position by it. A forged key_num makes that size exceed the segment's remaining space, so the advance walks past the segment and trips the cache_pos_advance() BUG_ON. Reject a kset whose on-media size exceeds cache_seg_remain() before use..

Description

In the Linux kernel, the following vulnerability has been resolved: dm-pcache: reject a kset that overruns its segment cache_replay(), the writeback worker and the GC worker read a kset of get_kset_onmedia_size() bytes and advance the position by it. A forged key_num makes that size exceed the segment's remaining space, so the advance walks past the segment and trips the cache_pos_advance() BUG_ON. Reject a kset whose on-media size exceeds cache_seg_remain() before use.

Affected Software

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

VendorProductVersions
LinuxLinux>= 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0, < 01a700e9278da5706c865b9ca3ae70fdb7b4531d; >= 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0, < 96e2863b1f81ea61b8d8d5d5a45d3b4c018f8e10; >= 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0, < 7ac1f10f987a2ffae4aecf0e2ceca8f552b665cb
LinuxLinux6.18

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-98868?
In the Linux kernel, the following vulnerability has been resolved: dm-pcache: reject a kset that overruns its segment cache_replay(), the writeback worker and the GC worker read a kset of get_kset_onmedia_size() bytes and advance the position by it. A forged key_num makes that size exceed the segment's remaining space, so the advance walks past the segment and trips the cache_pos_advance() BUG_ON. Reject a kset whose on-media size exceeds cache_seg_remain() before use.
How severe is CVE-2026-98868?
Severity scoring for CVE-2026-98868 is pending analysis.
How do I fix CVE-2026-98868?
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.

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Source: NVD / NIST