Incorrect audit records for ptrace(2) syscall requests

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-49426
StatePUBLISHED
Assignerfreebsd
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-19 06:17:41 UTC
Updated2026-08-19 06:17:41 UTC
DescriptionWhen auditing a system call executed via ptrace(PT_SC_REMOTE), the kernel passed the return value of an internal setup function to AUDIT_SYSCALL_EXIT() rather than the actual result of the executed system call. As a result, committed audit records for system calls which returned an error do not reflect the true outcome of the operation. That is, they indicate that the operation succeeded when it in fact failed. Audit records for system calls executed via ptrace(PT_SC_REMOTE) may show an incorrect error status. An attacker with the ability to debug a process could use this to produce misleading audit trails, potentially undermining audit-based Intrusion Detection Systems (IDS).

Risk And Classification

Problem Types: CWE-223 | CWE-224 | CWE-223 CWE-223: Omission of Security-relevant Information | CWE-224 CWE-224: Obscured Security-relevant Information by Alternate Name

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA FreeBSD FreeBSD affected 15.1-RELEASE p1 release Not specified
CNA FreeBSD FreeBSD affected 15.0-RELEASE p11 release Not specified
CNA FreeBSD FreeBSD affected 14.4-RELEASE p7 release Not specified
CNA FreeBSD FreeBSD affected 14.3-RELEASE p16 release Not specified

References

ReferenceSourceLinkTags
security.freebsd.org/advisories/FreeBSD-SA-26:45.audit.asc [email protected] security.freebsd.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Kyle Evans (en)

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