CVE-2026-43492

medium Red Hat
CVSS v3 Base Score
5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS Score
0.0%
Exploitation probability in 30 days
Top 95% most likely to be exploited
Attack Characteristics
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Confidentiality
None
Integrity
None
Availability
High
Published: May 19, 2026 (52 days ago)
Last Modified: May 19, 2026
Vendor: Red Hat
Source: REDHAT

Description

A flaw was found in the Linux kernel. A local user could trigger an integer underflow in the mpi_read_raw_from_sgl() function within the lib/crypto: mpi component. This occurs when invoking a KEYCTL_PKEY_ENCRYPT system call with a larger output length than input length and providing a zero-filled input buffer. Successful exploitation leads to a Denial of Service (DoS) due to the kernel spinning indefinitely.

CWE

CWE-191

Affected Products

Red Hat Enterprise Linux 10Red Hat Enterprise Linux 6Red Hat Enterprise Linux 7Red Hat Enterprise Linux 8Red Hat Enterprise Linux 9

References

🔗 bugzilla.redhat.com 🔗 www.cve.org 🔗 nvd.nist.gov 🔗 git.kernel.org