CVE•Published 2026-05-01•Modified 2026-07-14•0 articles on news•6 live references•NVD data
CVE-2026-43040Linux · Linux_kernel
Vulnerability data via NVD (ingested)
CVSS v3.1
7.1
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
EPSS percentile
2
Exploit Prediction Scoring System · top 98% of all CVEs
Weaknesses (CWE)
Description
In the Linux kernel, the following vulnerability has been resolved: net: ipv6: ndisc: fix ndisc_ra_useropt to initialize nduseropt_padX fields to zero to prevent an info-leak When processing Router Advertisements with user options the kernel builds an RTM_NEWNDUSEROPT netlink message. The nduseroptmsg struct has three padding fields that are never zeroed and can leak kernel data The fix is simple, just zeroes the padding fields.
Timeline
Published 2026-05-01
Modified 2026-07-14
External references
Search for exposed instances
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Shodan · vuln tag440 hosts
vuln:CVE-2026-43040Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · OS
os:"Linux Kernel"Hosts Shodan identified as running Linux Kernel.
More intel sources (5)
Shodan report
vuln:CVE-2026-43040Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-43040Censys host search filtered to this CVE id.
grep.app
CVE-2026-43040Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-43040GitHub code search for direct mentions.
Google dork
"CVE-2026-43040" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-43040 on GitHub.
We haven't classified any articles referencing CVE-2026-43040 yet. The external references above still apply.