netfilter: nf_conntrack: destroy stale expectfn expectations on unregister

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Linux Distros Unpatched Vulnerability : CVE-2026-53349

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - netfilter: nfconntrack: destroy stale expectfn expectations on unregister NAT helpers such as nfnath323 store a raw pointer to module text in exp-expectfn e.g...

CVE-2026-53349

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfconntrack: destroy stale expectfn expectations on unregister NAT helpers such as nfnath323 store a raw pointer to module text in exp-expectfn e.g. ipnatq931expect. nfcthelperexpectfnunregister only unlinks the callba...

UBUNTU-CVE-2026-53349

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfconntrack: destroy stale expectfn expectations on unregister NAT helpers such as nfnath323 store a raw pointer to module text in exp-expectfn e.g. ipnatq931expect. nfcthelperexpectfnunregister only unlinks the callba...

CVE-2026-53349 netfilter: nf_conntrack: destroy stale expectfn expectations on unregister

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfconntrack: destroy stale expectfn expectations on unregister NAT helpers such as nfnath323 store a raw pointer to module text in exp-expectfn e.g. ipnatq931expect. nfcthelperexpectfnunregister only unlinks the callba...

CVE-2026-53349

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfconntrack: destroy stale expectfn expectations on unregister NAT helpers such as nfnath323 store a raw pointer to module text in exp-expectfn e.g. ipnatq931expect. nfcthelperexpectfnunregister only unlinks the callba...

CVE-2026-53349

CVE-2026-53349 concerns the Linux kernel netfilter nf_conntrack component where a stale exp->expectfn pointer can survive module removal (e.g., nf_nat_h323) and be invoked later, causing a crash (Oops) in init_conntrack when a connection arrives. The fix adds nf_ct_helper_expectfn_destroy() to...