nfs4_setup_readdir(): insufficient locking for ->d_parent->d_inode dereferencing
Key facts
- Attack vector
- —
- Privileges required
- —
- User interaction
- —
- Attack complexity
- —
- Impact type
- —
- Confidentiality · integrity · availability
- —
- Fix status
- Partial Red Hat: 5 without a fix
No CVSS vector from any source. Fix status from CNA and Red Hat.
Summary
In the Linux kernel, the following vulnerability has been resolved: nfs4_setup_readdir(): insufficient locking for ->d_parent->d_inode dereferencing Theoretically it's an oopsable race, but I don't believe one can manage to hit it on real hardware; might become doable on a KVM, but it still won't be easy to attack. Anyway, it's easy to deal with - since xdr_encode_hyper() is just a call of put_unaligned_be64(), we can put that under ->d_lock and be done with that.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 2.6.12 and later | 5.4.302, 5.10.247, 5.15.197, 6.1.159, 6.6.117, 6.12.58, 6.17.8, 6.18 | Patch available | CNA |
- Linux VendorLinux Affected 2.6.12 and later Fixed in 5.4.302, 5.10.247, 5.15.197, 6.1.159, 6.6.117, 6.12.58, 6.17.8, 6.18 Patch available CNA
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.4.302, 5.10.247, 5.15.197, 6.1.159, 6.6.117, 6.12.58, 6.17.8, 6.18
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
Timeline
- 2026-10-02 Threatist record created from CVE-2025-68185
- 2026-10-03 Alias added: GHSA-6x57-w9x2-9hq7
References
Other 8
- https://git.kernel.org/stable/c/6025f641a0e30afdc5aa62017397b1860ad9f677
- https://git.kernel.org/stable/c/e6cafe71eb3b5579b245ba1bd528a181e77f3df1
- https://git.kernel.org/stable/c/fa4daf7d11e45b72aad5d943a7ab991f869fff79
- https://git.kernel.org/stable/c/504b3fb9948a9e96ebbabdee0d33966a8bab15cb
- https://git.kernel.org/stable/c/eacfd08b26a062f1095b18719715bc82ad35312e
- https://git.kernel.org/stable/c/40be5b9080114f18b0cea386db415b68a7273c1a
- https://git.kernel.org/stable/c/f5e570eaab36a110c6ffda32b87c51170990c2d1
- https://git.kernel.org/stable/c/a890a2e339b929dbd843328f9a92a1625404fe63
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Sources
- CVE-2025-68185 · CVE Program
- CVE-2025-68185 · NVD
- FIRST EPSS
- GHSA-6x57-w9x2-9hq7 · GitHub Advisory Database · CC BY 4.0
- CVE-2025-68185 · Red Hat security data · CC BY 4.0
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