Google patches Chrome's 6th actively-exploited zero-day of 2026 — CISA gives federal agencies until Sept 18
- What happened
- Google shipped an emergency Chrome update after confirming in-the-wild exploitation of a V8 type-confusion bug that lets malicious web content corrupt memory and achieve code execution inside the sandbox. CISA added it to KEV within hours of disclosure.
- Affected
- Google Chrome before 152.0.7977.82/.83 (Windows/macOS) and before 152.0.7977.82 (Linux); the same release also fixes 11 other bugs (10 high, 2 medium) in V8, WebGL, Skia, Network, and DevTools.
- Exploitation
- Actively exploited in the wild — confirmed by Google; reported to Google by researcher Salvatore Gulizia. CISA KEV remediation due date: 2026-09-18 for federal civilian agencies.
- Fix
- Update to Chrome 152.0.7977.82/.83 or later (and the equivalent Chromium-based browser builds — Edge, Brave, etc. — once they ship).
- Check if you're exposed
- Check
chrome://versionon managed fleets; anything reporting a build below 152.0.7977.82 is vulnerable. Force an update push via your browser-management policy rather than waiting for auto-update. - Source
- Help Net Security — Google patches actively exploited Chrome zero-day (CVE-2026-85046) · 2026-09-04 · corroborated by The Hacker News and CISA KEV catalog
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Working root-privilege-escalation exploit published for a Linux kernel SCTP use-after-free
- What happened
- Public proof-of-concept exploit code landed for a use-after-free in the Linux kernel's SCTP stack (triggered when a Stale Cookie ERROR rolls an association back from COOKIE_ECHOED to COOKIE_WAIT while data is queued). It's a companion bug to the recently-disclosed "SCTPhantom" flaw and was initially under-rated as a denial-of-service issue before the PoC showed it drives full local root.
- Affected
- Distribution kernels that have not picked up the SCTP stream-scheduler fix issued in early August 2026 (Debian, Ubuntu, RHEL/Rocky and derivatives are all in scope until patched — check your distro's kernel changelog rather than trusting the version string alone, since backports don't always bump the version number).
- Exploitation
- Public PoC/exploit released — reported by security research outlet securityonline.info, exploit code published to GitHub.
- Fix
- Update to a kernel build that includes the SCTP outqueue-purge fix for stale-cookie handling (shipped alongside/after the SCTPhantom fixes in early August 2026). Where SCTP isn't required, blacklist the
sctpkernel module as a stopgap. - Check if you're exposed
lsmod | grep sctpto see if the module is loaded; if you can't confirm your kernel package includes the post-August-6 SCTP fix, treat the host as exposed and prioritize the module blacklist until patched.- Source
- securityonline.info — CVE-2026-52924 PoC Exploit Disclosed: 9.8 CVSS Linux Root Privilege Escalation · 2026-09-05 · background via The Hacker News — 18-Year-Old Linux SCTP Flaw
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*Note: the seven CISA KEV additions from 2026-09-02 (Sangoma Switchvox, Kestra OSS, LiteLLM, JFrog Artifactory, SonicWall SMA1000 x2, Kludex Starlette) and the PaperCut/JFrog/SonicWall/GeoServer/ownCloud/cPanel/VMware/Fire Ant items from prior briefs remain live and unpatched-fleet risk, but nothing material changed on them beyond the PaperCut campaign above in this 48-hour window.*
Recommended deep-dive for this window
For the PaperCut CVE-2026-81578/CVE-2026-82078 exploitation chain now driving hands-on-keyboard intrusions against K-12 and university networks (Arctic Wolf, Sept 5 2026): what is the full post-exploitation toolset and infrastructure being used (beyond the known IPs 45.142.193.132 and 194.180.48.134), is there evidence of a single actor or multiple opportunistic crews, has any data been sold or leaked yet, does Emergency Patch Release 3 fully close the chain or have further bypasses been found, and what detection/hunting queries (EDR, PaperCut logs) most reliably catch this activity pre-domain-compromise?
This is the only development this window with confirmed, escalating real-world impact against a specific, under-resourced sector (education), a named research source, and concrete IOCs — but the actor, full scope, and patch durability are still unclear, making it the highest-value gap to close before Monday.
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