CVE-2026-90148: Linux Linux

NFSv4: Fix incorrect argument passed to nfs4_delete_lease() in nfs4_add_lease()

No CVSS scoreEPSS 0.0021 · 11th percentile

Published by the CVE Program (CNA: Linux) at 17 Sept 2026, 16:06 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Linux	Linux	affected e93a5e9306a576011f03011b492d4fbaa274477b to before c951b876cccd8a4e21fe8b9712894f6a2513ddbc git affected e93a5e9306a576011f03011b492d4fbaa274477b to before e25e5b4a764638ec9e2dc6c9affe080c922ea1f2 git affected e93a5e9306a576011f03011b492d4fbaa274477b to before ff7244faa13b23e9acfad9df0438f0b44b338f62 git affected e93a5e9306a576011f03011b492d4fbaa274477b to before d148a652d52fd6aee96daf798922eb800ebb3018 git affected e93a5e9306a576011f03011b492d4fbaa274477b to before d179ff22cd8514f966966fd9ad425dcbb98e1ada git affected e93a5e9306a576011f03011b492d4fbaa274477b to before 468e458ffde907ba19acd2102ca1fbb8f6fbede2 git Other versions: unaffected
Linux	Linux	affected 5.14 unaffected before 5.14 semver unaffected 6.1.191 to 6.1., inclusive semver unaffected 6.6.160 to 6.6., inclusive semver unaffected 6.12.110 to 6.12., inclusive semver unaffected 6.18.52 to 6.18., inclusive semver unaffected 7.2.6 to 7.2., inclusive semver unaffected 7.3 to , inclusive original_commit_for_fix Other versions: affected

Identifiers

CVE-2026-90148

CNA

Linux

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Linux kernel NFSv4 client code is affected from commit e93a5e9306a576011f03011b492d4fbaa274477b until the fixes listed for each stable branch, and is affected in version 5.14 but not in versions before 5.14. The bug is a race between nfs4_add_lease() and a delegation return, where an incorrect argument can cause a NULL pointer dereference in generic_setlease(), which can crash the kernel. The source gives few details on who can trigger the race or what conditions are needed. Upgrade to a fixed kernel version for your branch; no workaround is listed.

Written 12 Nov 2026.

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

No source has published a CVSS score for this record yet.

CISA KEV Not listed.
EPSS 0.0021, the 11th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 17 Sept 2026. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.