CVE-2026-89770
In the Linux kernel, the following vulnerability has been resolved: iomap: don't free integrity payload that doesn't exist fs_bio_integrity_alloc might not allocate a bio integrity payload if PI verification is disabled on the block device. Check for that case before calling fs_bio_integrity_free in iomap_bio_read_folio_range_sync to avoid a NULL pointer dereferences. Make the branch cover the PI verification as well - while fs_bio_integrity_verify works without an integrity payload, it requires one to actually do useful work.
Affected versions
Linux kernel versions
7.1
and later are affected. Fixed in
7.2.4,
7.3-rc1
and their respective stable series.
References
2 totalFrequently asked questions
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What is CVE-2026-89770?
CVE-2026-89770 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 7.1 onward and has been patched in 7.2.4 and 7.3-rc1. CVE-2026-89770 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-2026-89770?
Yes. CVE-2026-89770 has been patched. Fixed versions include 7.2.4 and 7.3-rc1. If you are running Linux kernel 7.1 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-89770 actively exploited?
No. CVE-2026-89770 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.