CVE-2026-90148: NFSv4: Fix incorrect argument passed to nfs4_delete_lease() in nfs4_add_lease()
Noroxi assessment
Priority: Monitor (action score 0/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 0.21% (FIRST EPSS).
- Fixed version: Linux Linux 468e458ffde907ba19acd2102ca1fbb8f6fbede2, c951b876cccd8a4e21fe8b9712894f6a2513ddbc, d148a652d52fd6aee96daf798922eb800ebb3018; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes.
Low priority for now. Upgrade to Linux Linux 468e458ffde907ba19acd2102ca1fbb8f6fbede2, c951b876cccd8a4e21fe8b9712894f6a2513ddbc, d148a652d52fd6aee96daf798922eb800ebb3018; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
In the Linux kernel, the following vulnerability has been resolved: NFSv4: Fix incorrect argument passed to nfs4_delete_lease() in nfs4_add_lease() When nfs4_add_lease() races with a delegation return, it calls nfs4_delete_lease() to clean up. Previously, it passed priv, which can legitimately be NULL. Passing a NULL priv eventually leads to a NULL pointer dereference in generic_setlease().
- Published
- Sep 17, 2026
- Updated
- Oct 30, 2026
- EPSS
- 0.2% · 11th percentile
- CWE
- —
Report tools
Action score
0
Monitor
Low priority for now.
- CVSS
- 0 / 40 · —
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.2%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
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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
- 5.14affected
- e93a5e9306a576011f03011b492d4fbaa274477b and later · before c951b876cccd8a4e21fe8b9712894f6a2513ddbcaffected · git
- e93a5e9306a576011f03011b492d4fbaa274477b and later · before e25e5b4a764638ec9e2dc6c9affe080c922ea1f2affected · git
- e93a5e9306a576011f03011b492d4fbaa274477b and later · before ff7244faa13b23e9acfad9df0438f0b44b338f62affected · git
- e93a5e9306a576011f03011b492d4fbaa274477b and later · before d148a652d52fd6aee96daf798922eb800ebb3018affected · git
- e93a5e9306a576011f03011b492d4fbaa274477b and later · before d179ff22cd8514f966966fd9ad425dcbb98e1adaaffected · git
- e93a5e9306a576011f03011b492d4fbaa274477b and later · before 468e458ffde907ba19acd2102ca1fbb8f6fbede2affected · git
- before 5.14not affected · semver
- 6.1.191 and later · up to and including 6.1.*not affected · semver
- 6.6.160 and later · up to and including 6.6.*not affected · semver
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | linux | from 0 | — |
| Debian:12 | linux-6.12 | before 6.12.111-1~deb12u1 | 6.12.111-1~deb12u1 |
| Debian:13 | linux | before 6.12.111-1 | 6.12.111-1 |
| Debian:14 | linux | before 7.2.6-1 | 7.2.6-1 |
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation40Plan
- CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment40Plan
- CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()40Plan
Published before and after this one in the same product
- ← EarlierCVE-2026-90146Sep 17, 2026 · bpf, xdp: move offload check into dev_xdp_install()31Monitor
- ← EarlierCVE-2026-90147Sep 17, 2026 · clk: devres: fix cleanup in devm_clk_get_optional_enabled_with_rate()0Monitor
- Later →CVE-2026-90149Sep 17, 2026 · NFSv4/flexfiles: fix NULL dereference for NFSv4.0 data servers30Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Linux Linux | 468e458ffde907ba19acd2102ca1fbb8f6fbede2 | Vendor (CNA) |
| Linux Linux | c951b876cccd8a4e21fe8b9712894f6a2513ddbc | Vendor (CNA) |
| Linux Linux | d148a652d52fd6aee96daf798922eb800ebb3018 | Vendor (CNA) |
| Linux Linux | d179ff22cd8514f966966fd9ad425dcbb98e1ada | Vendor (CNA) |
| Linux Linux | e25e5b4a764638ec9e2dc6c9affe080c922ea1f2 | Vendor (CNA) |
| Linux Linux | ff7244faa13b23e9acfad9df0438f0b44b338f62 | Vendor (CNA) |
| azl3 kernel 6.6.150.1-1 on Azure Linux 3.0 | — | Microsoft (MSRC) |
| azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 | Release Notes | Microsoft (MSRC) |
| azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 | Release Notes | Microsoft (MSRC) |
| debian:linux | 6.12.111-1 · Debian:13 | Package registry (OSV) |
| debian:linux-6.12 | 6.12.111-1~deb12u1 · Debian:12 | Package 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.
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 researchersFinders, 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)
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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
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (5 more)Show less
- git.kernel.org/stable/c/c951b876cccd8a4e21fe8b9712894f6a2513ddbc
- git.kernel.org/stable/c/d148a652d52fd6aee96daf798922eb800ebb3018
- git.kernel.org/stable/c/d179ff22cd8514f966966fd9ad425dcbb98e1ada
- git.kernel.org/stable/c/e25e5b4a764638ec9e2dc6c9affe080c922ea1f2
- git.kernel.org/stable/c/ff7244faa13b23e9acfad9df0438f0b44b338f62
Vendor advisories and official records. Exploit/PoC links are deliberately left out.