Red Hat Linux kernel advisory update for active exploitation
Advisory/Mitigation
Summary
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Red Hat updated its Linux kernel advisories on September 19, 2026 to flag active exploitation of CVE-2025-39682, CVE-2026-53266, and CVE-2025-39964, pushing operators to treat the flaws as high priority. The guidance says there are known public exploits for at least one of the CVEs, increasing the urgency for remediation. FCEB agencies were told to apply the necessary fixes by September 21, 2026 under BOD 26-04.
Related Happenings
Linux kernel security patch release for CVE-2026-64507
Security Patch Release
H score24
First: 29.09.2026 20:00
Last: 29.09.2026 20:00
Sources 1
About this happening:
Mitigations for Branch Target Reuse (BTR) have been released and merged into the Linux kernel, delivering fixes for CVE-2026-64507 and CVE-2026-64508. The update a...
Linux kernel security patch release for CVE-2026-64507
Security Patch ReleaseAbout this happening: Mitigations for Branch Target Reuse (BTR) have been released and merged into the Linux kernel, delivering fixes for CVE-2026-64507 and CVE-2026-64508. The update a...
Linux kernel actively exploited flaws (multiple vulnerabilities)
Vulnerability
H score46
First: 19.09.2026 09:24
Last: 19.09.2026 09:24
Sources 1
How related:
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Friday added three security flaws impacting the Linux kernel to its Known Exploited Vulnerabilities (KEV) catalog, citing evidence of active exploitation.
About this happening:
Three Linux kernel vulnerabilities—CVE-2025-39682, CVE-2026-53266, and CVE-2025-39964—were added to CISA KEV after evidence of active exploitation. The fla...
Linux kernel actively exploited flaws (multiple vulnerabilities)
VulnerabilityHow related: The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Friday added three security flaws impacting the Linux kernel to its Known Exploited Vulnerabilities (KEV) catalog, citing evidence of active exploitation.
About this happening: Three Linux kernel vulnerabilities—CVE-2025-39682, CVE-2026-53266, and CVE-2025-39964—were added to CISA KEV after evidence of active exploitation. The fla...
CISA adds Linux kernel flaws to KEV catalog under BOD 26-04
Public Sector Action
H score36
First: 19.09.2026 09:24
Last: 19.09.2026 09:24
Sources 1
How related:
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Friday added three security flaws impacting the Linux kernel to its Known Exploited Vulnerabilities (KEV) catalog, citing evidence of active exploitation.
About this happening:
CISA added three Linux kernel flaws to its KEV catalog after evidence of active exploitation, forcing federal remediation prioritization. Under BOD 26-04, FC...
CISA adds Linux kernel flaws to KEV catalog under BOD 26-04
Public Sector ActionHow related: The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Friday added three security flaws impacting the Linux kernel to its Known Exploited Vulnerabilities (KEV) catalog, citing evidence of active exploitation.
About this happening: CISA added three Linux kernel flaws to its KEV catalog after evidence of active exploitation, forcing federal remediation prioritization. Under BOD 26-04, FC...
Linux kernel traffic-control use-after-free race public exploit privilege-escalation flaw (CVE-2026-53264)
Vulnerability
H score28
First: 28.07.2026 11:04
Last: 28.07.2026 11:04
Sources 1
About this happening:
Public exploit code for CVE-2026-53264 turns a Linux kernel traffic-control use-after-free race into local privilege escalation to root on affected builds. The dem...
Linux kernel traffic-control use-after-free race public exploit privilege-escalation flaw (CVE-2026-53264)
VulnerabilityAbout this happening: Public exploit code for CVE-2026-53264 turns a Linux kernel traffic-control use-after-free race into local privilege escalation to root on affected builds. The dem...
Linux kernel upstream security patch release for CVE-2026-53264
Security Patch Release
H score32
First: 28.07.2026 11:04
Last: 28.07.2026 11:04
Sources 1
About this happening:
Linux kernel maintainers have backported CVE-2026-53264 fixes across stable branches, closing a local privilege-escalation path that can turn a local user into root on...
Linux kernel upstream security patch release for CVE-2026-53264
Security Patch ReleaseAbout this happening: Linux kernel maintainers have backported CVE-2026-53264 fixes across stable branches, closing a local privilege-escalation path that can turn a local user into root on...
Timeline
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19.09.2026 09:24 2 articles · 13d ago
Red Hat Linux kernel advisory update for active exploitation
Initial DisclosureRed Hat revised its Linux kernel advisories after exploitation evidence emerged for three tracked vulnerabilities. The update centers on priority remediation for affected systems.
Show sources
- CISA Flags Three Linux Kernel Vulnerabilities Exploited in the Wild — thehackernews.com — 19.09.2026 09:24
- CISA Flags Three Linux Kernel Vulnerabilities Exploited in the Wild — thehackernews.com — 19.09.2026 09:24