CVE-2026-80790

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    CVE-2026-80790

    Published: 4 Sept 2026Last Modified: 15 Sept 2026

    Summary: nvmet-fc: fix invalid free in LS IOD error path

    Details: 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.

    References: https://git.kernel.org/stable/c/1a8f007faefe8c226ec65896589f8d59b0a8d5a5, https://git.kernel.org/stable/c/371fb1bf902adaa59be32bd7e904a5317e604fd0, https://git.kernel.org/stable/c/449e9c4f8db84ad9d9bb288029b230bcf590faa2, https://git.kernel.org/stable/c/8bce9cd08aae4283badf8ddc11fbb6f57b75a81e, https://git.kernel.org/stable/c/94334ea92f4d7535f66f86e33681efa94827eddc, https://git.kernel.org/stable/c/b189c6e408896ccc23d2e76d7738847cdebf1532, https://git.kernel.org/stable/c/ba98d6796d12258e837ece065d2ecb59d76ce4ff, https://git.kernel.org/stable/c/bb9489f0dce58da730d3479588d6710d7a2c1b45, https://git.kernel.org/stable/c/d094582cce9c08516d714e7436a8f3b9211dda90, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80790.json, https://nvd.nist.gov/vuln/detail/CVE-2026-80790, https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- c53432030d86429dc9fe5adc3d68cb9d1343b0b2
    Fixed -b189c6e408896ccc23d2e76d7738847cdebf1532

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-80790 | CVE-DB