CVE-2017-9059 — The NFSv4 implementation in the Linux kernel through 4
The NFSv4 implementation in the Linux kernel through 4.11.1 allows local users to cause a denial of service (resource consumption) by leveraging improper channel callback shutdown when unmounting an NFSv4 filesystem, aka a "module reference and kernel daemon" leak.
Published
2017-05-18T06:29:00.700
Last modified
2026-05-13T00:24:29.033
CVSS vector
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
01What is this vulnerability?
The NFSv4 implementation in the Linux kernel through 4.11.1 allows local users to cause a denial of service (resource consumption) by leveraging improper channel callback shutdown when unmounting an NFSv4 filesystem, aka a "module reference and kernel daemon" leak.
02Affected products
No structured affected-product list available — see references below for vendor advisories.
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2017-05-18T06:29:00.700
- Last modified: 2026-05-13T00:24:29.033
09References
- git.kernel.org — http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c70422…
- www.securityfocus.com — http://www.securityfocus.com/bid/98551
- bugzilla.redhat.com — https://bugzilla.redhat.com/show_bug.cgi?id=1451386
- github.com — https://github.com/torvalds/linux/commit/c70422f760c120480fee4de6c38804c72aa26bc…
- www.spinics.net — https://www.spinics.net/lists/linux-nfs/msg63334.html
- git.kernel.org — http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c70422…
- www.securityfocus.com — http://www.securityfocus.com/bid/98551
- bugzilla.redhat.com — https://bugzilla.redhat.com/show_bug.cgi?id=1451386
- github.com — https://github.com/torvalds/linux/commit/c70422f760c120480fee4de6c38804c72aa26bc…
- www.spinics.net — https://www.spinics.net/lists/linux-nfs/msg63334.html
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