Unknown

CVE-2026-80790 — nvmet-fc: fix invalid free in LS IOD error path

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.

Published Sep 4, 2026 · Updated Oct 19, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.2% (30-day exploitation probability)+1

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.2%

ahead of 9% of scored CVEs · Oct 26, 2026

Affects

Linux

CVSS base

—

Score not published yet.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux	≥ c53432030d86429dc9fe5adc3d68cb9d1343b0b2 and < b189c6e408896ccc23d2e76d7738847cdebf1532≥ c53432030d86429dc9fe5adc3d68cb9d1343b0b2 and < 449e9c4f8db84ad9d9bb288029b230bcf590faa2≥ c53432030d86429dc9fe5adc3d68cb9d1343b0b2 and < 1a8f007faefe8c226ec65896589f8d59b0a8d5a5≥ c53432030d86429dc9fe5adc3d68cb9d1343b0b2 and < d094582cce9c08516d714e7436a8f3b9211dda90≥ c53432030d86429dc9fe5adc3d68cb9d1343b0b2 and < 371fb1bf902adaa59be32bd7e904a5317e604fd0≥ c53432030d86429dc9fe5adc3d68cb9d1343b0b2 and < 8bce9cd08aae4283badf8ddc11fbb6f57b75a81e≥ c53432030d86429dc9fe5adc3d68cb9d1343b0b2 and < bb9489f0dce58da730d3479588d6710d7a2c1b45≥ c53432030d86429dc9fe5adc3d68cb9d1343b0b2 and < 94334ea92f4d7535f66f86e33681efa94827eddc and 2 more ≥ c53432030d86429dc9fe5adc3d68cb9d1343b0b2 and < ba98d6796d12258e837ece065d2ecb59d76ce4ffversion 4.10	Vulnerable	CVE Program (cve.org) e CISA ADP

EPSS over time FIRST

Oct 15, 2026 → Oct 26, 2026 · 11 reading(s) · max 0.20%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Not enough vector or weakness data: use the affected application’s logs as a starting point.

application logs

Timeline

What happened to this CVE, newest first.

2026
Record published
Oct 15, 2026
Affected products added · linux/linux
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Source status changed · → Received
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Sep 4, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

1× References added · Oct 19, 2026 – Oct 19, 2026
1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

11 on the record

git.kernel.org/stable/c/371fb1bf902adaa59be32bd7e904a5317e604fd0
NIST National Vulnerability Database
git.kernel.org/stable/c/d094582cce9c08516d714e7436a8f3b9211dda90
NIST National Vulnerability Database
nvd.nist.gov/vuln/detail/CVE-2026-80790
GitHub Security Advisories
git.kernel.org/stable/c/ba98d6796d12258e837ece065d2ecb59d76ce4ff
NIST National Vulnerability Database
git.kernel.org/stable/c/b189c6e408896ccc23d2e76d7738847cdebf1532
NIST National Vulnerability Database
git.kernel.org/stable/c/bb9489f0dce58da730d3479588d6710d7a2c1b45
NIST National Vulnerability Database
git.kernel.org/stable/c/94334ea92f4d7535f66f86e33681efa94827eddc
NIST National Vulnerability Database
git.kernel.org/stable/c/449e9c4f8db84ad9d9bb288029b230bcf590faa2
NIST National Vulnerability Database
github.com/advisories/GHSA-8g5c-jgpx-6xcv
GitHub Security Advisories
git.kernel.org/stable/c/8bce9cd08aae4283badf8ddc11fbb6f57b75a81e
NIST National Vulnerability Database
git.kernel.org/stable/c/1a8f007faefe8c226ec65896589f8d59b0a8d5a5
NIST National Vulnerability Database

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

Unknown CVE-2026-99092 riscv: patch: fix handling of bpf-jit execmem addresses 1d
Unknown CVE-2026-99093 mm: don't schedule deferred kernel page table freeing while booting 1d
Unknown CVE-2026-99095 drm/vc4: drain the hangcheck timer and works on V3D unbind 1d
Unknown CVE-2026-99096 io_uring/register: don't exempt disabled rings from task restrictions 1d
Unknown CVE-2026-99097 tee: shm: reject zero-sized allocations in tee_dyn_shm_alloc_helper() 1d
Unknown CVE-2026-99098 dm-integrity: fix buffer overflow in inline mode with large tag size 1d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No CVSS score published by NVD, the CNA, CISA or GitHub so far.
No fixed version, patch or mitigation documented.
No CISA SSVC assessment.
No CWE classification.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-80790 is "nvmet-fc: fix invalid free in LS IOD error path", rated Unknown. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. EPSS 0.20% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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