CVE-2026-53266Vulnerability
Linux Kernel Out-of-Bounds Write Vulnerability
Reported by 4 independent sources · first reported by CERT-FR · last reported
Last reported 9 days ago
Fix due 21 Sep 2026
Used by ransomware: not knownCISA KEV catalogue
higher than 57% of CVEsFIRST EPSS, as of 23 Oct 2026
What the reports say
8 reports, newest first · the exact sentence from each-
Multiples vulnérabilités dans le noyau Linux de SUSE (16 octobre 2026)“Référence CVE CVE-2026-53266”
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September 2026 CVE Landscape“CVE-2026-53266”
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Multiples vulnérabilités dans le noyau Linux de Red Hat (02 octobre 2026)“Référence CVE CVE-2026-53266”
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Multiples vulnérabilités dans le noyau Linux de Red Hat (25 septembre 2026)“Référence CVE CVE-2026-53266”
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CISA BOD 26-04 Timelines for Three Linux Kernel CVEs“CISA added three actively exploited Linux kernel vulnerabilities: CVE-2025-39682, CVE-2026-53266, and CVE-2025-39964 to its KEV Catalog on September 18, 2026, triggering a 3-day remediation deadline that passed on September 21.”
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Bulletin d'actualité CERTFR-2026-ACT-040 (21 septembre 2026)“CVE-2026-53266”
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CISA Adds Two Known Exploited Vulnerabilities to Catalog“CVE-2026-53266 Linux Kernel Out-of-Bounds Write Vulnerability”
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Multiples vulnérabilités dans le noyau Linux d'Ubuntu (18 septembre 2026)“Référence CVE CVE-2026-53266”
Indicators reported together
named in the same reportsAlso named with it: CVE-2025-39964, CVE-2025-39682, CVE-2026-87491, CVE-2026-63823, CVE-2026-68121, CVE-2026-68155, CVE-2026-68159, CVE-2026-52993, CVE-2026-53002, CVE-2026-53185, CVE-2026-64191, CVE-2026-76460, CVE-2026-76461, CVE-2026-58704, CVE-2026-87886, CVE-2023-54391, CVE-2026-68273, CVE-2026-74469, CVE-2025-40323, CVE-2026-46199
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