Is there a public exploit for CVE-2026-99137?

No public exploit for CVE-2026-99137 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.

— Unscored

In the Linux kernel, the following vulnerability has been resolved: cifs: don't update isize in cifsdotruncate without a cached handle If…

CVE-2026-99137

In the Linux kernel, the following vulnerability has been resolved: cifs: don't update isize in cifsdotruncate without a cached handle If findwritablefile() returns null, cifsfileflush will return 0 without issuing setfilesize, and the outer 'if (!rc)' block will set isize to 0 before telling the server to truncate. If the cifsopen() then fails, the inode will have size 0, while the server file is unchanged. Move the netfsresizefile() and cifssetsize() into the 'if (cfile)', so they only run after a successful setfilesize. In the no-handle else branch, evict stale pages with truncateinodepages before the OTRUNC open to dispose of old cache pages, and let the open response set the isize.

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: 28 October 2026
Last updated: 28 October 2026
Assigner: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

At the source

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