Is there a public exploit for CVE-2026-99277?

No public exploit for CVE-2026-99277 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-2026-99277 affect?

CVE-2026-99277 affects Linux Linux.

— Unscored

In the Linux kernel, the following vulnerability has been resolved: ksmbd: hold a connection reference for each session channel…

CVE-2026-99277

In the Linux kernel, the following vulnerability has been resolved: ksmbd: hold a connection reference for each session channel ksmbdsessionunregister() removes a session from the global and per- connection tables before dropping the table reference. A concurrent reference holder can keep the session and its channel list alive after those removals. Connection cleanup can no longer find the unpublished session to remove its channels. Since a channel only stores a raw conn pointer, the connection can be freed while another session reference holder is still accessing it, for example during SMB3.1.1 binding or a procfs read. Take a connection reference when registering a channel and release it on insertion failure, channel removal, or final session destruction. Keep the channels and signing keys until the session is destroyed so a response can still be signed after the session has been unregistered.

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: 7 November 2026
Last updated: 7 November 2026
Affected: Linux · Linux
Assigner: Linux

At the source

EUVD (ENISA)

References

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