TGViewer
Linux Kernel Security Linux Kernel Security @linkersec · 4.74K subscribers
Post #91 1.09K
CVE-2021–20226: a reference counting bug which leads to local privilege escalation in io_uring

An article describing a bug in the io_uring subsystem. Improper handling of files_struct references leading to a use-after-free.

https://flattsecurity.medium.com/cve-2021-20226-a-reference-counting-bug-which-leads-to-local-privilege-escalation-in-io-uring-e946bd69177a
Medium CVE-2021–20226 a reference counting bug which leads to local privilege escalation in io_uring. Hello, I’m Shiga( @Ga_ryo_ ), a security engineer at Flatt Security Inc.
Open in Telegram All posts from @linkersec
More from @linkersec
  1. Sep 28, 2026PageJack in Action: CVE-2022-0995 exploit Article by Jean Vincent describing how a relativ…
  2. Sep 21, 2026CROSS-X: Generalized and Stable Cross-Cache Attack on the Linux Kernel Paper by Dong-ok Ki…
  3. Sep 16, 2026Testing race conditions with memory access tracing and stack-based delay injection Article…
  4. Sep 8, 2026SCTPhantom: An 18-Year-Old SCTP ASCONF Transport Use-After-Free Article about exploiting C…
  5. Aug 14, 2026Gone in 60 Frames – USB Video Exploitation Article (and slides) by Alex Plaskett and Rober…
  6. Aug 11, 2026IonStack part III: Rooting Android 17 with GhostLock Article about adapting the exploit of…
Threads Profile ViewerView any public Threads profile without an account.Open ThreadLook →Writing with AI? Make it sound human.Metric37 rewrites AI drafts so they read naturally. Free AI detector, 1,500 words free.Try Metric37 →