Threats / Linux / CVE-2026-31431
CVE-2026-31431
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Linux Kernel vulnerability
Linux Kernel vulnerability involving incorrect resource transfer between privilege spheres allows local privilege escalation.
Verdict
Today item — known-exploited.
A resource transfer flaw in the Linux Kernel permits attackers with local access to escalate privileges. Active exploitation in the wild indicates immediate risk to systems running affected kernel versions.
01
Is it exploitable?
— the evidence, ranked above the scoreExploit available
Fully weaponized — public exploit code is cataloged for this vulnerability.We link the existence of the exploit; we do not host or redistribute payloads.
Reported exploitation
4 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-05-01).
Probability (EPSS)
EPSS 0.94016 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: Linux, Kernel. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-669 CWE-669.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
WeaknessCWE-669 · CWE-669
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
Gain local system access through standard user account or service compromise.
Business
Attacker establishes initial foothold on target infrastructure.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
Exploit the resource transfer vulnerability to move privileged resources across security boundaries.
Business
Attacker bypasses privilege isolation mechanisms designed to contain damage.
3
Lateral reach — past segmentation narrative 3
Attacker
Escalate to root or kernel-level privileges through the mishandled resource transfer.
Business
Attacker gains complete system control, enabling data theft, malware installation, or lateral movement.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05