Is there a public exploit for CVE-2026-99284?

No public exploit for CVE-2026-99284 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-2026-99284 affect?

CVE-2026-99284 affects Linux Linux.

— Unscored

In the Linux kernel, the following vulnerability has been resolved: net: skbuff: propagate shared-frag marker in skbzerocopy()…

CVE-2026-99284

In the Linux kernel, the following vulnerability has been resolved: net: skbuff: propagate shared-frag marker in skbzerocopy() skbzerocopy() moves frag descriptors from @from into @to and takes a reference on each frag, but it does not copy skbshinfo(from)->flags into skbshinfo(to)->flags. A destination skb holding the same page-cache backed frags as the source therefore reports skbhassharedfrag() as false. That breaks the invariant relied on by later in-place writers. ESP input checks skbhassharedfrag() before deciding whether an uncloned nonlinear skb can skip skbcowdata(); with the marker lost, an skb that skbzerocopy() built for nfnetlinkqueue or for an openvswitch upcall is decrypted in place, letting an unprivileged user write into the page cache of a root-owned read-only file. Propagate SKBFLSHAREDFRAG when frag descriptors are copied, as done for the other frag-transfer helpers.

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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