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CVE-2026-80857· NVD / CVE Program· CNA Linux

fuse: wait for FR_FINISHED on abort_on_kill to prevent use-after-free

In the Linux kernel, the following vulnerability has been resolved: fuse: wait for FR_FINISHED on abort_on_kill to prevent use-after-free The abort_on_kill path in request_wait_answer() calls fuse_abort_conn() and returns without waiting for FR_FINISHED. If fuse_dev_do_write() is concurrently processing the same request (FR_LOCKED set), the caller frees req->args while it is still being accessed, causing a use-after-free. Fix this by jumping to the existing wait_event(FR_FINISHED) instead of returning early. The wait will not hang because fuse_abort_conn() ensures all requests are ended.

—No exploit Fix available
Published
Sep 4, 2026
Updated
Sep 7, 2026
EPSS
0.2% · 10th percentile
CWE
—
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Action score

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Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

Noroxi analysis

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Affected systems

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Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 300e812b882a174dca675d8028684001ad5826bc, 7.1affected
    • 0c7fca880a40a209a9c92be14143996d14b93ff6 and later · before a8bbb2a60513bf322170903c21462f0bf4f62be2affected · git
    • 204aa22a686bfee48daca7db620c1e017615f2ff and later · before 715cb86e33cda43f5224cdc3fd5610c0b6a46f7aaffected · git
    • 204aa22a686bfee48daca7db620c1e017615f2ff and later · before 64b0b5cacbd2fea88001464cb712c9dfc795b26eaffected · git
    • 6.18.25 and later · before 6.18.50affected · semver
    • 7.0.2 and later · before 7.1affected · semver
    • before 7.1not affected · semver
    • 6.18.50 and later · up to and including 6.18.*not affected · semver
    • 7.2.3 and later · up to and including 7.2.*not affected · semver
    • 7.3-rc1 and laternot affected · original_commit_for_fix

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:14linuxbefore 7.2.6-17.2.6-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

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  • CVE-2026-74309vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
    40Plan
  • CVE-2026-74280crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
    40Plan
  • CVE-2026-74279crypto: cavium/cpt - fix DMA cleanup using wrong loop index
    40Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux6.18.50Vendor (CNA)
Linux Linux64b0b5cacbd2fea88001464cb712c9dfc795b26eVendor (CNA)
Linux Linux7.1Vendor (CNA)
Linux Linux715cb86e33cda43f5224cdc3fd5610c0b6a46f7aVendor (CNA)
Linux Linuxa8bbb2a60513bf322170903c21462f0bf4f62be2Vendor (CNA)
debian:linux7.2.6-1 · Debian:14Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

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Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records