VulnerabilityPublished 23 Oct 2026

CVE-2026-99080: Linux kernel · fs: Free any excess xarray nodes in clear_inode()

Source GCVE Database

Authoritative record:CVE-2026-99080· Low

Not known to be exploited · fixed in f1c966eb6ed5e190c90a56c5bdaa69967de39f21 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:05 UTC

Severity

Low

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in f1c966eb6ed5e190c90a56c5bdaa69967de39f21, ee3f011250104129893d8e9599147e457d4d7280, 50cff3f112d64db6e5f57355f79bc837db8fe132 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 23 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-g6p5-3jcv-j9vr

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 77da9389b9d5f07d54fda092d1ab56002ec0019a, < f1c966eb6ed5e190c90a56c5bdaa69967de39f21	Fixed in f1c966eb6ed5e190c90a56c5bdaa69967de39f21
LinuxLinux	Affected ≥ 77da9389b9d5f07d54fda092d1ab56002ec0019a, < ee3f011250104129893d8e9599147e457d4d7280	Fixed in ee3f011250104129893d8e9599147e457d4d7280
LinuxLinux	Affected ≥ 77da9389b9d5f07d54fda092d1ab56002ec0019a, < 50cff3f112d64db6e5f57355f79bc837db8fe132	Fixed in 50cff3f112d64db6e5f57355f79bc837db8fe132
LinuxLinux	Affected ≥ 77da9389b9d5f07d54fda092d1ab56002ec0019a, < 43f830e2bb84b22ca824b20bb861d823ecb520bd	Fixed in 43f830e2bb84b22ca824b20bb861d823ecb520bd
LinuxLinux	Affected ≥ 77da9389b9d5f07d54fda092d1ab56002ec0019a, < 21f51434c47d8628b62275ae6c6ad6b573abcd02	Fixed in 21f51434c47d8628b62275ae6c6ad6b573abcd02
LinuxLinux	Affected =4.20	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: fs: Free any excess xarray nodes in clear_inode() For many years we've had a hard to hit leak of xarray nodes. Hugh documented it well in commit 786b31121a2c. Recently people and syzbot have found ways to force it to happen with madvise. Rather than fix the leaks where they happen, just call xa_destroy() which has the side-effect of cycling the i_pages lock.

References

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