Is there a public exploit for CVE-2026-99263?

No public exploit for CVE-2026-99263 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

What does CVE-2026-99263 affect?

CVE-2026-99263 affects Linux Linux.

— Unscored

In the Linux kernel, the following vulnerability has been resolved: iouring/poll: avoid retry wakeup loss when dropping ownership If a…

CVE-2026-99263

In the Linux kernel, the following vulnerability has been resolved: iouring/poll: avoid retry wakeup loss when dropping ownership If a wakeup sets IOPOLLRETRYFLAG between the owning task consuming the existing instance of IOPOLLRETRYFLAG and the loop check of iopollcheckevents(), then we stall on processing the request until an unrelated wakeup comes along. Using atomiccmpxchg instead of atomicsubreturn to guarantee both the count v and pollrefs are 0 and no wake-ups are missed.

Assessment

CVSS: Not yet scored
Severity: Unscored
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 3 November 2026
Last updated: 3 November 2026
Affected: Linux · Linux
Assigner: Linux

At the source

EUVD (ENISA)

References

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