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CVE-2026-49426 is a FreeBSD ptrace/audit vulnerability in which audit records for system calls executed via ptrace(PT_SC_REMOTE) are generated with the wrong result status. According to the provided advisory context, when auditing a system call executed through PT_SC_REMOTE, the kernel passed the return value of an internal setup function to AUDIT_SYSCALL_EXIT() instead of the actual return value of the remotely executed system call. As a result, audit(4) can record a remotely executed syscall as successful even when the syscall itself failed. The issue affects the correctness and trustworthiness of audit logging for ptrace-mediated remote syscall execution rather than the execution semantics of the syscall itself.
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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.
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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.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A FreeBSD ptrace access-control vulnerability that may allow bypass of debugging restrictions.
A FreeBSD ptrace vulnerability that can weaken or bypass intended tracing restrictions.
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.