CVE-2026-80790
In the Linux kernel, the following vulnerability has been resolved: nvmet-fc: fix invalid free in LS IOD error path nvmet_fc_alloc_ls_iodlist() advances iod while initializing the LS IOD array. If an rqstbuf allocation or response buffer DMA mapping fails, the unwind loop decrements iod past the start of the array. The final kfree(iod) therefore frees an address before the allocated object. This can be reproduced with nvme-fcloop and failslab by setting fail-nth to 6 before creating a target port. KASAN reports: BUG: KASAN: invalid-free in nvmet_fc_register_targetport Free of addr ffff88816cf8ff48 by task nvmet_fail_nth/9552 Free the original allocation base stored in tgtport->iod instead. With this fix applied, the same sysfs write with fail-nth=6 returns -ENOMEM without any KASAN report.
Affected versions
Linux kernel versions
4.10
and later are affected. Fixed in
5.10.267,
5.15.218,
6.1.185,
6.6.154,
6.12.106,
6.18.47,
7.1.11,
7.2.1,
7.3
and their respective stable series.
References
9 totalFrequently asked questions
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What is CVE-2026-80790?
CVE-2026-80790 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 4.10 onward and has been patched in 5.10.267, 5.15.218, 6.1.185 and others. CVE-2026-80790 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-2026-80790?
Yes. CVE-2026-80790 has been patched. Fixed versions include 5.10.267, 5.15.218, 6.1.185 and others. If you are running Linux kernel 4.10 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-80790 actively exploited?
No. CVE-2026-80790 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.