CVE-2026-98843
In the Linux kernel, the following vulnerability has been resolved: netfs: zero gaps in read-gaps folio to avoid writing back stale data netfs_read_gaps() leaves gaps around a streaming write's dirty region unread on the server side, so a short/EOF response there left stale folio content that later got written back. Zero it after the read completes, not before: netfs_wait_for_read() returns rreq->transferred once ret >= 0, so build an iterator over the same bvec array the read used, advance past ret, and zero the rest. The dirty region already maps to sink pages in that array rather than the real folio, so this can't touch it, and only the actual shortfall gets zeroed instead of the whole gap upfront.
Affected versions
Linux kernel versions
6.12
and later are affected. Fixed in
6.18.56,
7.2.10,
7.3
and their respective stable series.
References
3 totalFrequently asked questions
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What is CVE-2026-98843?
CVE-2026-98843 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.12 onward and has been patched in 6.18.56, 7.2.10 and 7.3. CVE-2026-98843 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-98843?
Yes. CVE-2026-98843 has been patched. Fixed versions include 6.18.56, 7.2.10 and 7.3. If you are running Linux kernel 6.12 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-98843 actively exploited?
No. CVE-2026-98843 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.