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CVE-2026-43493 is a Linux kernel vulnerability in the crypto pcrypt subsystem caused by incorrect handling of asynchronous requests submitted with the MAY_BACKLOG flag. In the vulnerable logic, MAY_BACKLOG requests can legitimately return EBUSY, but this condition was not handled correctly. The fix indicates that the kernel must explicitly check for EBUSY and filter out EINPROGRESS notifications. Improper handling of these return states can cause incorrect completion semantics and faulty request processing in the pcrypt path.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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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.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A specific vulnerability affecting Red Hat Enterprise Linux 10.2 kernel-related packages; the content does not provide technical details beyond listing it in the advisory.
A Linux kernel vulnerability in the crypto pcrypt component involving improper handling of MAY_BACKLOG requests.
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.