MEDIUM
CVE-2026-43193
Published: May 6, 2026· Updated: May 11, 2026
5.5
CVSS v3.1
EPSS:0.02%probability of exploitation in 30 daysPercentile:5.0th
Official Description
In the Linux kernel, the following vulnerability has been resolved:
nfsd: fix nfs4_file refcount leak in nfsd_get_dir_deleg()
Claude pointed out that there is a nfs4_file refcount leak in
nfsd_get_dir_deleg(). Ensure that the reference to "fp" is released
before returning.
Technical Analysis
CVE-2026-43193 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Vendors & Products
Linux1 product
linux kernel
Source: NVD CPE · 1 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
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GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
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PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories
All References (2)
Quick Facts
CVE IDCVE-2026-43193
CVSS Score5.5 / 10
SeverityMEDIUM
CISA KEVNo
EPSS (30d)0.02%
Affected1 vendor
PublishedMay 6, 2026
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-43193 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.