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CVE-2026-53392 is a null-pointer dereference vulnerability in the Linux kernel NFSv4 flexfiles client. The ff_layout_alloc_lseg() parser decodes the filehandle-version array count from a flexfiles layout and passes it to kzalloc_objs(). A zero count returns ZERO_SIZE_PTR rather than NULL; because the prior code rejected only NULL, it could store this invalid pointer in dss_info->fh_versions. Subsequent flexfiles layout-return/update processing assumes at least one filehandle version exists and can dereference the invalid pointer. The fix rejects fh_count values of zero before allocation, consistent with existing validation in the flexfiles GETDEVICEINFO parser.
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18 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux kernel NFSv4 flexfiles input-validation flaw involving a zero filehandle version count.
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.