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CVE-2026-53391 is a NULL pointer dereference in the Linux kernel NFSv4/pNFS multipath data-server address decoder, nfs4_decode_mp_ds_addr. While decoding r_netid and r_addr fields from a netaddr4 structure in a GETDEVICEINFO multipath-DS response, the code accepted a zero-length encoded r_addr. The string-decoding routine returned success while leaving the decoded address pointer NULL; subsequent port-separator parsing dereferenced that NULL pointer. The fix rejects zero-length address values as malformed GETDEVICEINFO data and returns -EBADMSG.
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No public exploit code observed for this vulnerability.
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14 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux kernel NFSv4/pNFS input-validation flaw involving a zero-length r_addr in nfs4_decode_mp_ds_addr.
A Linux kernel vulnerability addressed by the Oracle Linux patch; no flaw details are provided.
A vulnerability addressed by AlmaLinux ALSA-2026:63014 affecting listed AlmaLinux 8 kernel packages.
A vulnerability referenced by the AlmaLinux ALSA-2026:63013 security advisory for AlmaLinux 8 kernel-rt packages.
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.