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CVE-2024-53216 is a use-after-free vulnerability in the Linux kernel NFS server subsystem (nfsd). The final cache_head reference can drop to zero during c_show or e_show while execution remains inside an RCU read-side critical section. This invokes svc_export_put or expkey_put; svc_export_put can immediately free ex_uuid before the display routines finish accessing it, producing a slab use-after-free in svc_export_show. Cleanup can also invoke path_put and dput, potentially sleeping inside the RCU read-side critical section. The issue was introduced in Linux 4.20. The fix uses rcu_work to defer object release until after an RCU grace period and perform potentially sleeping cleanup asynchronously.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel NFS server flaw involving unsafe release of svc_expkey and svc_export objects. It can cause a use-after-free and sleeping operations within an RCU read-side critical section. The fix defers cleanup using rcu_work and an RCU grace period. The reference rates the vulnerability High, with a CVSS v3 base score of 7.8 and a local, low-privilege attack vector.
Linux kernel NFSD export-key and export object release issue.
A Linux kernel vulnerability in nfsd involving release of svc_expkey/svc_export with rcu_work.
Linux kernel NFSD resource-lifetime flaw.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.