CVE-2026-49424

The Linux waitid() implementation translates a FreeBSD siginfo_t struct into a stack-declared Linux siginfo_t. It did not first zero the stack struct. An unprivileged user may observe 104 bytes of uninitialized kernel stack data, which may contain sensitive information.

CVSS 3.1

5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS

0.2% chance of exploitation in the next 30 days; higher than 4% of CVEs (scores of 2026-10-26)

CWE

CWE-908

Published

2026-08-19

Modified

2026-10-27

Record from

the NVD, synced 2026-10-27

Affected

• freebsd:freebsd

References

• https://security.freebsd.org/advisories/FreeBSD-SA-26:47.linux.asc

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