nfsd: add fh_want_write() for early-verified SETATTR in nfsd_proc_setattr()
In the Linux kernel, the following vulnerability has been resolved: nfsd: add fh_want_write() for early-verified SETATTR in nfsd_proc_setattr() The BOTH_TIME_SET branch calls fh_verify() early so setattr_prepare() can inspect the dentry. This causes nfsd_setattr() to skip fh_want_write(), so notify_change() runs without a mount write reference. Add the missing fh_want_write() call after the early fh_verify().
- Published
- Sep 11, 2026
- Updated
- Sep 14, 2026
- EPSS
- 0.7% · 53th percentile
- CWE
- —
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Report tools
Action score
36
Monitor
Low priority for now.
- CVSS
- 36 / 40 · 9.1 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.7%
CNA vs NVD score
- NVD
- —
- CNA · Linux
- 9.1
- NVD has not scored this yet; the score shown is the CNA’s.
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected 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
- 1cb57d81cf20fe24b9e2e1daf57bfbdc24b77cd8, 4.2affected
- cc265089ce1b176dde963c74b53593446ee7f99a and later · before 3eec9d791968c177a4a8cda9af5c04f79dae09cbaffected · git
- cc265089ce1b176dde963c74b53593446ee7f99a and later · before 9229d824b938f4fb0ea7a5dddade51735e6fe6f9affected · git
- cc265089ce1b176dde963c74b53593446ee7f99a and later · before 2150305134889fb2fc25228d35353bd2f6f29500affected · git
- cc265089ce1b176dde963c74b53593446ee7f99a and later · before d823bf9285cdf4514873b85ab5a888878dd4e8f4affected · git
- cc265089ce1b176dde963c74b53593446ee7f99a and later · before 15ca3b64a69caa6194bed8f98a20ed90a11c11ddaffected · git
- cc265089ce1b176dde963c74b53593446ee7f99a and later · before 533964d420d385e11b08dd4c56c66ef5dcccaf08affected · git
- cc265089ce1b176dde963c74b53593446ee7f99a and later · before c4a409b86a92815181a8e9395c6bf1696ad19175affected · git
- cc265089ce1b176dde963c74b53593446ee7f99a and later · before 4e475be769aa9f7a2c1ce55a2b8592cfccacddccaffected · git
- 3.18.46 and later · before 3.19affected · 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 | all versions | — |
| 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.
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- CVE-2026-74309vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler40Plan
- CVE-2026-74280crypto: marvell/octeontx - fix DMA cleanup using wrong loop index40Plan
- CVE-2026-74279crypto: cavium/cpt - fix DMA cleanup using wrong loop index40Plan
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 | 15ca3b64a69caa6194bed8f98a20ed90a11c11dd | Vendor (CNA) |
| Linux Linux | 2150305134889fb2fc25228d35353bd2f6f29500 | Vendor (CNA) |
| Linux Linux | 3.19 | Vendor (CNA) |
| Linux Linux | 3eec9d791968c177a4a8cda9af5c04f79dae09cb | Vendor (CNA) |
| Linux Linux | 4e475be769aa9f7a2c1ce55a2b8592cfccacddcc | Vendor (CNA) |
| Linux Linux | 533964d420d385e11b08dd4c56c66ef5dcccaf08 | Vendor (CNA) |
| Linux Linux | 9229d824b938f4fb0ea7a5dddade51735e6fe6f9 | Vendor (CNA) |
| Linux Linux | c4a409b86a92815181a8e9395c6bf1696ad19175 | Vendor (CNA) |
| Linux Linux | d823bf9285cdf4514873b85ab5a888878dd4e8f4 | Vendor (CNA) |
| debian:linux | 6.12.111-1 · Debian:13 | 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.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
—
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
nvd-secondary
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
- git.kernel.org/stable/c/15ca3b64a69caa6194bed8f98a20ed90a11c11dd
- git.kernel.org/stable/c/2150305134889fb2fc25228d35353bd2f6f29500
- git.kernel.org/stable/c/3eec9d791968c177a4a8cda9af5c04f79dae09cb
- git.kernel.org/stable/c/4e475be769aa9f7a2c1ce55a2b8592cfccacddcc
- git.kernel.org/stable/c/533964d420d385e11b08dd4c56c66ef5dcccaf08
- git.kernel.org/stable/c/9229d824b938f4fb0ea7a5dddade51735e6fe6f9
- git.kernel.org/stable/c/c4a409b86a92815181a8e9395c6bf1696ad19175
- git.kernel.org/stable/c/d823bf9285cdf4514873b85ab5a888878dd4e8f4
Vendor advisories and official records. Exploit/PoC links are deliberately left out.