Page generated: 11 Nov 2026, 08:38 UTC
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CVE-2025-39964

In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg Issuing two writes to the same af_alg socket is bogus as the data will be interleaved in an unpredictable fashion. Furthermore, concurrent writes may …

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In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg Issuing two writes to the same af_alg socket is bogus as the data will be interleaved in an unpredictable fashion. Furthermore, concurrent writes may create inconsistencies in the internal socket state. Disallow this by adding a new ctx->write field that indiciates exclusive ownership for writing.
CVSS 7.8 (HIGH) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.2/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 7.8: +1.17
  • Fresh EPSS: 1.61%: +0.01

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 11 documents and public datasets.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
0/100
Grounded branding (15%)
0/100
HYPE TOTAL0/100

Sources and documents

CyberSecurityNews
Press · 25 Sep 2026, 07:00 · 14-Year-Old Linux Kernel Flaw Lets Local Users Gain Root Access and Escape Containers - CyberSecurityNews
Cyber Press
Press · 25 Sep 2026, 07:00 · 14-Year-Old Linux Kernel Vulnerability Lets Attackers Gain Root and Escape Containers - Cyber Press
Dataconomy
Press · 22 Sep 2026, 07:00 · CISA Orders Urgent Patches For Three Exploited Linux Flaws - Dataconomy
LinkedIn
Press · 21 Sep 2026, 07:00 · CISA Orders Emergency Action As Three Linux Kernel Flaws Come Under Active Attack - LinkedIn
TechRadar
Press · 21 Sep 2026, 07:00 · Linux users beware — CISA flags three major security issues you need to patch right now - TechRadar
See all 11 source documents
SC Media
Press · 21 Sep 2026, 07:00 · CISA adds Linux kernel flaws to exploited vulnerabilities catalog - SC Media
BleepingComputer
Press · 21 Sep 2026, 07:00 · CISA alerts of active exploitation of three Linux kernel flaws - BleepingComputer
Security Affairs
Press · 20 Sep 2026, 07:00 · U.S. CISA adds Linux Kernel flaws to its Known Exploited Vulnerabilities catalog - Security Affairs
CyberSecurityNews
Press · 19 Sep 2026, 07:00 · CISA Warns of Linux Kernel Vulnerabilities Actively Exploited in Attacks - CyberSecurityNews
The Hacker News
Press · 19 Sep 2026, 07:00 · CISA Flags Three Linux Kernel Vulnerabilities Exploited in the Wild - The Hacker News
Tech Times
Press · 19 Sep 2026, 07:00 · CISA Flags Three Actively Exploited Linux Kernel Flaws, Orders Federal Patch by Sunday - Tech Times

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 8.2 (2026-11-02 15:13). The curve appears once the score changes.

Public exploit evidence

0

Public exploit entries / repo candidates

Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 7.8; EPSS 1.6%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
local access, low privileges, no user interaction.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:59:36.081987+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
Published
13 Oct 2025, 13:48
Added to the CISA KEV catalog
18 Sep 2026, 00:00
First press mention
19 Sep 2026, 07:00
Latest press mention
25 Sep 2026, 07:00
Score calculated
05 Nov 2026, 13:59