8

CVE-2025-68803: NFSD: NFSv4 file creation neglects setting ACL

Deferred
AliasesUBUNTU-CVE-2025-68803DEBIAN-CVE-2025-68803
Published 13-01-2026Last modified 19-10-2026

Vulnerability summary

CVE-2025-68803 is a high (CVSS 8.0) Incorrect Authorization vulnerability in linux. EPSS estimates a 0.45% chance of exploitation in the next 30 days, higher than 38.9% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 8, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.0/10
010
High · v3.1 (CVE.org)
EPSS score
0.45%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 40 · Related 37
DLA-4475-1DLA-4476-1DSA-6126-1DSA-6127-1OPENSUSE-SU-2026:20287-1SUSE-SU-2026:0447-1

Timeline

  1. 13-01-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.45%

Chance of exploitation in the next 30 days

Percentile

39%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.44% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, low-privilege account, user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu144 products
  • linux< 5.15.0-173.183 | < 6.8.0-117.117 | < 6.17.0-22.22
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1103.110 | < 6.8.0-1055.58 | < 6.17.0-1012.12
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.162-1 | < 6.12.69-1 | < 6.18.3-1
Linux1 product
  • linux≥ c5409ce523af40d5c3019717bc5b4f72038d48be, < c182e1e0b7640f6bcc0c5ca8d473f7c57199ea3d | ≥ d52acd23a327cada5fb597591267cfc09f08bb1d, < 75f91534f9acdfef77f8fa094313b7806f801725 | ≥ c0cbe70742f4a70893cd6e5f6b10b6e89b6db95b, < 60dbdef2ebc2317266a385e4debdb1bb0e57afe1 | ≥ c0cbe70742f4a70893cd6e5f6b10b6e89b6db95b, < 381261f24f4e4b41521c0e5ef5cc0b9a786a9862 | ≥ c0cbe70742f4a70893cd6e5f6b10b6e89b6db95b, < bf4e671c651534a307ab2fabba4926116beef8c3 | ≥ c0cbe70742f4a70893cd6e5f6b10b6e89b6db95b, < 214b396480061cbc8b16f2c518b2add7fbfa5192 | ≥ c0cbe70742f4a70893cd6e5f6b10b6e89b6db95b, < 913f7cf77bf14c13cfea70e89bcb6d0b22239562 | ≥ 5.10.220, < 5.10.248 | ≥ 5.15.154, < 5.15.198 | 6.0

3 vendors · 146 products

References

39 links
Show all 39 references