What is CVE-2026-49424?

CVE-2026-49424 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10. CVE-2026-49424 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-49424?

CVE-2026-49424 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Is there a patch available for CVE-2026-49424?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2026-49424 patch availability.

Is CVE-2026-49424 actively exploited?

CVE-2026-49424 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-49424

Medium

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.

Package Linux Kernel

Published 2026-08-19

Last modified 2026-08-31

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Vector string

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

Weakness type

CWE-908

CVE-2026-49424 is classified as CWE-908

See CWE-908 on MITRE CWE for full details on this weakness type.

References

1 total

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

Vendor Advisory

Details

CVE ID CVE-2026-49424

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-08-19

Modified 2026-08-31

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2026-49424?

CVE-2026-49424 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . CVE-2026-49424 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-49424?

CVE-2026-49424 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Is there a patch available for CVE-2026-49424?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2026-49424 patch availability.
Is CVE-2026-49424 actively exploited?

No. CVE-2026-49424 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.