Is there a public exploit for CVE-2026-99242?

No public exploit for CVE-2026-99242 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-2026-99242 affect?

CVE-2026-99242 affects Linux Linux.

— Unscored

In the Linux kernel, the following vulnerability has been resolved: ntfs: fix race between fallocate and mmap reads The fallocate…

CVE-2026-99242

In the Linux kernel, the following vulnerability has been resolved: ntfs: fix race between fallocate and mmap reads The fallocate implementation only takes invalidatelock for punch hole, collapse range, and insert range operations. For standard allocation modes (mode == 0, FALLOCFLKEEPSIZE), the lock is not held. During ntfsattrfallocate(), new clusters are mapped to the runlist via ntfsattrmapcluster() before being zeroed by ntfsdiozerorange(). This creates a window where concurrent mmap page faults can read uninitialized disk data. Since mmap uses filemapfault() which takes invalidatelock in shared mode, it can fault in pages during this window and expose old disk contents to userspace. This is an information leak and data integrity issue. Fix by taking invalidatelock for all fallocate operations, not just for punch/collapse/insert modes. This prevents concurrent page faults from accessing unzeroed clusters during the allocation window.

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: 2 November 2026
Last updated: 2 November 2026
Affected: Linux · Linux
Assigner: Linux

At the source

EUVD (ENISA)

References

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