VulnerabilityPublished 17 Sep 2026Updated 30 Oct 2026

CVE-2026-90148: Linux kernel · NFSv4: Fix incorrect argument passed to nfs4_delete_lease() in nfs4_add_lease()

Source GCVE Database

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Authoritative record:CVE-2026-90148· Medium

Not known to be exploited · fixed in ff7244faa13b23e9acfad9df0438f0b44b338f62 : update Linux kernel when convenient.

Data as of 30 Oct 2026, 19:17 UTC

Severity

Medium

Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD

Thin evidence

One scorer or none

Patch: Available – fixed in ff7244faa13b23e9acfad9df0438f0b44b338f62, e25e5b4a764638ec9e2dc6c9affe080c922ea1f2, d179ff22cd8514f966966fd9ad425dcbb98e1ada +3

Exploitation evidence

Disclosed: evidence found.
CVE published 17 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 30 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.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), 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-h59h-gp4w-wvx7

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ e93a5e9306a576011f03011b492d4fbaa274477b, < ff7244faa13b23e9acfad9df0438f0b44b338f62	Fixed in ff7244faa13b23e9acfad9df0438f0b44b338f62
LinuxLinux	Affected ≥ e93a5e9306a576011f03011b492d4fbaa274477b, < e25e5b4a764638ec9e2dc6c9affe080c922ea1f2	Fixed in e25e5b4a764638ec9e2dc6c9affe080c922ea1f2
LinuxLinux	Affected ≥ e93a5e9306a576011f03011b492d4fbaa274477b, < d179ff22cd8514f966966fd9ad425dcbb98e1ada	Fixed in d179ff22cd8514f966966fd9ad425dcbb98e1ada
LinuxLinux	Affected ≥ e93a5e9306a576011f03011b492d4fbaa274477b, < d148a652d52fd6aee96daf798922eb800ebb3018	Fixed in d148a652d52fd6aee96daf798922eb800ebb3018
LinuxLinux	Affected ≥ e93a5e9306a576011f03011b492d4fbaa274477b, < c951b876cccd8a4e21fe8b9712894f6a2513ddbc	Fixed in c951b876cccd8a4e21fe8b9712894f6a2513ddbc
LinuxLinux	Affected ≥ e93a5e9306a576011f03011b492d4fbaa274477b, < 468e458ffde907ba19acd2102ca1fbb8f6fbede2	Fixed in 468e458ffde907ba19acd2102ca1fbb8f6fbede2

AI-suggested

A fix has been applied in the Linux kernel to correct the argument passed to nfs4_delete_lease(). Users should update to the fixed kernel version once available. No additional mitigation steps are indicated.

Description

A vulnerability in the Linux kernel's NFSv4 implementation was fixed where an incorrect argument was passed to the nfs4_delete_lease() function from nfs4_add_lease(). This could lead to a NULL pointer dereference in generic_setlease() when nfs4_add_lease() races with a delegation return.

References

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