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CVE-2026-63824 is a Linux kernel vulnerability in the KEYS subsystem affecting keyctl_pkey_params_get_2(). The flaw is caused by incorrect calculation of the length for an internal output buffer. When a caller supplies a buffer that is smaller than required, the kernel may allocate the internal output buffer based on the caller-provided size rather than the maximum length required by the underlying cryptographic primitive, resulting in an overflow. The issue was fixed by changing the allocation logic to size the internal output buffer according to the maximum length of the cryptographic primitive.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
7 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
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.