⚠️ Let's Encrypt Halts Certificate Issuance After Cross-Signed Root Certificate Incident
Source: https://t.co/UyHDVTTZPm
Let's Encrypt temporarily suspended all certificate issuance on May 8, 2026, after engineers identified a critical issue involving a cross-signed certificate linking the organization's Generation X root to its upcoming Generation Y root infrastructure.
The incident triggered a complete shutdown of issuance across both production and staging environments before services were restored within hours. At 18:37 UTC on May 8, Let's Encrypt engineers became aware of a potential incident and immediately halted all certificate issuance as a precautionary measure.
#cybersecuritynews
時系列で言うとこんな感じかな
3月23日 報告
3月24日-4月20日(28日間
MITRE/CISA vs Linux Foundation vs ベンダー間の調整
国家機関(NSA?)からの意見
「いつ公開するか」「どこまで開示するか」の検討
4月1日 パッチ提交
4月22日 CVE割り当て(ようやく合意)
4月29日 公開(さらに1週間
Fast, developer-friendly JS/TS dependency vulnerability scanner with local lockfile scanning, OSV matching, direct vs transitive visibility, --fix, JSON output, and practical remediation guidance. https://t.co/Bat4K3uF2n
‼️Copy Fail (CVE-2026-31431) is a Linux privilege escalation bug that lets any local user get root using a 732-byte Python script, and itworks on basically every major Linux distro shipped since 2017.
Website: https://t.co/f5G6KnEv35
Write-up: https://t.co/W86Pz2PC6C
GitHub: https://t.co/zAMTC6nTRk
It's a logic flaw in the kernel's crypto code (authencesn via AF_ALG and splice()) that allows a small write into the page cache, which can be used to tamper with a setuid binary like /usr/bin/su.
Think how bad this is going to be for shared environments like Kubernetes, CI runners, and cloud sandboxes, where it enables container escape and tenant-to-host compromise.
Found by Theori's Xint Code scanner, patched in the mainline kernel, and publicly disclosed on April 29, 2026; if you can't patch right away, the recommended workaround is to disable the algif_aead module.
seeing how many people believed this without checking the Pyhton script is a reminder that a well-orchestrated fake Q-Day announcement/rumor could absolutely crater crypto markets