CVE•Published 2026-07-25•Modified 2026-09-08•1 article on news•4 live references•NVD data
CVE-2026-64380Linux · Linux_kernel
Vulnerability data via NVD (ingested)
CVSS v3.1
8.2
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
EPSS percentile
37
Exploit Prediction Scoring System · top 63% of all CVEs
Description
In the Linux kernel, the following vulnerability has been resolved: smb: client: harden POSIX SID length parsing posix_info_sid_size() reads sid[1] to obtain the subauthority count, but its existing boundary check still accepts buffers with only one remaining byte. Require two bytes before reading sid[1] so all client paths that reuse the helper reject truncated POSIX SIDs safely.
Timeline
Published 2026-07-25
Modified 2026-09-08
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2026-64380Hosts 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-2026-64380Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-64380Censys host search filtered to this CVE id.
grep.app
CVE-2026-64380Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-64380GitHub code search for direct mentions.
Google dork
"CVE-2026-64380" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-64380 on GitHub.