CVE-2025-68803 — NFSD: NFSv4 file creation neglects setting ACL
In the Linux kernel, the following vulnerability has been resolved: NFSD: NFSv4 file creation neglects setting ACL An NFSv4 client that sets an ACL with a named principal during file creation retrieves the ACL afterwards, and finds that it is only a default ACL (based on the mode bits) and not the ACL that was requested during file creation. This violates RFC 8881 section 6.4.1.3: "the ACL attribute is set as given". The issue occurs in nfsd_create_setattr(), which calls nfsd_attrs_valid() to determine whether to call nfsd_setattr(). However, nfsd_attrs_valid() checks only for iattr changes and security labels, but not POSIX ACLs. When only an ACL is present, the function returns false, nfsd_setattr() is skipped, and the POSIX ACL is never applied to the inode. Subsequently, when the client retrieves the ACL, the server finds no POSIX ACL on the inode and returns one generated from the file's mode bits rather than returning the originally-specified ACL.
Who exploits it and how urgent it is
A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.
How the score was calculated
- EPSS 0.5% (30-day exploitation probability)+6
- Technical severity (high)+6
The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).
Triage
Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.
CISA SSVC assessment CISA
Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.
Remediation
Fixes and mitigations documented by the sources — linked to the original advisory.
No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.
First 24 hours
Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.
- Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
- No fix documented in the sources: reduce exposure and monitor the vendor advisory.
- Exploitation requires user interaction: tighten email/web filtering and warn affected users.
- Search available logs for exploit probes, errors and authentication anomalies.
Affected scope
Vendor, product and versions as the sources word them.
| Vendor | Product | Versions | Status | Source |
|---|---|---|---|---|
| Linux | Linux |
≥ c5409ce523af40d5c3019717bc5b4f72038d48be and < c182e1e0b7640f6bcc0c5ca8d473f7c57199ea3d≥ d52acd23a327cada5fb597591267cfc09f08bb1d and < 75f91534f9acdfef77f8fa094313b7806f801725≥ c0cbe70742f4a70893cd6e5f6b10b6e89b6db95b and < 60dbdef2ebc2317266a385e4debdb1bb0e57afe1≥ c0cbe70742f4a70893cd6e5f6b10b6e89b6db95b and < 381261f24f4e4b41521c0e5ef5cc0b9a786a9862≥ c0cbe70742f4a70893cd6e5f6b10b6e89b6db95b and < bf4e671c651534a307ab2fabba4926116beef8c3≥ c0cbe70742f4a70893cd6e5f6b10b6e89b6db95b and < 214b396480061cbc8b16f2c518b2add7fbfa5192≥ c0cbe70742f4a70893cd6e5f6b10b6e89b6db95b and < 913f7cf77bf14c13cfea70e89bcb6d0b22239562≥ 5.10.220 and < 5.10.248 and 2 more≥ 5.15.154 and < 5.15.198version 6.0 |
Vulnerable | CVE Program (cve.org) e CISA ADP |
Attack characteristics
The CVSS vector, decoded. It describes the attack, not your exposure to it.
Every base score collected
Sources score independently and may disagree; each row says who scored it and under which version.
| Score | Version | Severity | Expl. | Impact | Scored by |
|---|---|---|---|---|---|
| 8.0 | CVSS 3.1 | High | 2.1 | 5.9 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 via NIST National Vulnerability Database |
| 8.0 | CVSS 3.1 | High | — | — | GitHub, Inc. via GitHub Security Advisories |
| 8.0 | CVSS 3.1 | High | — | — | Linux via CVE Program (cve.org) e CISA ADP |
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H (score shown at the top: 416baaa9-dc9f-4396-8d5f-8c081fb06d67) EPSS over time FIRST
Oct 13, 2026 → Oct 16, 2026 · 4 reading(s) · max 0.51%
Detection
Read off the CVSS vector and the weakness class. Starting points, not tested rules.
- Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
Timeline
What happened to this CVE, newest first.
- 2026
- SSVC assessment updated
- Affected products added · linux/linux
- Record published
- CVSS changed · 8.0
- Source status changed · → Deferred
- Record created in this database
- CVE published
Source activity
Repeated readings are counted rather than listed.
- 2× References added · Oct 14, 2026 – Oct 14, 2026
- 1× Official description updated · Oct 13, 2026 – Oct 13, 2026
References
11 on the record
- git.kernel.org/stable/c/60dbdef2ebc2317266a385e4debdb1bb0e57afe1
- github.com/advisories/GHSA-69qx-3mcm-9wpc
- git.kernel.org/stable/c/214b396480061cbc8b16f2c518b2add7fbfa5192
- git.kernel.org/stable/c/c182e1e0b7640f6bcc0c5ca8d473f7c57199ea3d
- git.kernel.org/stable/c/913f7cf77bf14c13cfea70e89bcb6d0b22239562
- git.kernel.org/stable/c/381261f24f4e4b41521c0e5ef5cc0b9a786a9862
- cert-portal.siemens.com/productcert/html/ssa-457936.html
- cert-portal.siemens.com/productcert/html/ssa-019113.html
- git.kernel.org/stable/c/75f91534f9acdfef77f8fa094313b7806f801725
- git.kernel.org/stable/c/bf4e671c651534a307ab2fabba4926116beef8c3
- nvd.nist.gov/vuln/detail/CVE-2025-68803
Elsewhere on this site
Related CVEs (same products)
- Critical CVE-2026-99999 ipv4: validate checksum_start before completing checksum 1d
- Unknown CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period 1d
- Unknown CVE-2026-98424 wifi: cfg80211: undo netns switch if renaming the wiphy fails 2d
- Unknown CVE-2026-98425 wifi: mac80211: don't warn when an IBSS has no channel to scan 2d
- Unknown CVE-2026-98426 wifi: mwifiex: fix IRQ leak using wrong index in MSI-X error path 2d
- Unknown CVE-2026-98427 net/sched: codel: bound the dropping loop per dequeue call 2d
Not in any source we poll
Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.
- No fixed version, patch or mitigation documented.
- No CWE classification.
- No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
- No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
- No exploit packet captures, log samples, or incident case IDs supplied.
Answered from this record
Text assembled only from the fields above — no additional claims.
What should defenders know first?
CVE-2025-68803 is "NFSD: NFSv4 file creation neglects setting ACL", rated High. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 8.0 describes technical severity. EPSS 0.51% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.
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