Home › CVE Intelligence › CVE-2026-43456
CVSS 8.0 HIGH 🔴 ACTIVELY EXPLOITED Zero-Day Exploit

CVE-2026-43456: Patch now: CISA warns of actively exploited Linux kernel zero-day (CVE-2026-43456)

<table> <tr><td> <a href="https://www.reddit.com/r/cybersecurity/comments/1unu3t9/patch_now_cisa_warns_of_actively_exploited_linux/"> <img src="https://external-preview.redd.it/…

8.0CVSS Score
HIGHSeverity
YESCISA KEV
Zero-Day ExploitImpact Type

📋 Vulnerability Details

CVE IDCVE-2026-43456
Vendorreddit_cyber
Affected ProductThreat Intelligence
Vulnerability TypeZero-Day Exploit
CVSS Score8.0 (HIGH)
Actively Exploited✅ Yes — CISA KEV Listed
Patch StatusSee Vendor Advisory →
Reported ByCYBERDUDEBIVASH SENTINEL APEX Intelligence (via reddit_cyber)

🔬 Technical Analysis

<table> <tr><td> <a href="https://www.reddit.com/r/cybersecurity/comments/1unu3t9/patch_now_cisa_warns_of_actively_exploited_linux/"> <img src="https://external-preview.redd.it/SZrdNnuFJRVK1iu7qGCKoxlDDmFriguxoiBB-QJrbBM.jpeg?width=640&crop=smart&auto=webp&s=cb08884e8bcdf2070a45f94f64ccfaaace91266a" alt="Patch now: CISA warns of actively exploited Linux kernel zero-day (CVE-2026-43456)" title="Patch now: CISA warns of actively exploited Linux kernel zero-day (CVE-2026-43456)" /> </a> </td><td> <!-- SC_OFF --><div class="md"><p>CVE-2026-43456 is a Linux kernel privilege escalation vulnerability that has been added to CISA's Known Exploited Vulne

🎯 Known Indicators of Compromise

{"type":"sha1","value":"cb08884e8bcdf2070a45f94f64ccfaaace91266a","confidence_score":0.9,"first_seen":"2026-07-05","source_count":1} {"type":"url","value":"https://www.reddit.com/r/cybersecurity/comments/1unu3t9/patch_now_cisa_warns_of_actively_exploited_l","confidence_score":0.82,"first_seen":"2026-07-05","source_count":1} {"type":"url","value":"https://external-preview.redd.it/SZrdNnuFJRVK1iu7qGCKoxlDDmFriguxoiBB-QJrbBM.jpeg?width=640&","confidence_score":0.82,"first_seen":"2026-07-05","source_count":1} {"type":"url","value":"https://www.reddit.com/user/NapierPalm">","confidence_score":0.82,"first_seen":"2026-07-05","source_count":1} {"type":"url","value":"https://thecybersecguru.com/exploits/cve-2026-43456-linux-kernel-zero-day/">[link]</a>","confidence_score":0.82,"first_seen":"2026-07-05","source_count":1} {"type":"domain","value":"www.reddit.com","confidence_score":0.75,"first_seen":"2026-07-05","source_count":1} {"type":"domain","value":"thecybersecguru.com","confidence_score":0.75,"first_seen":"2026-07-05","source_count":1}

📚 Advisory References

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