CVE-2026-19411

Shim/dp.c library: null-pointer dereference in is_removable_media_path() when devicepathtostr() returns null

Published Aug 10, 2026 CVSS 3.1 · 3.9 Low EPSS < 1% KEV · Not listed
Description
A NULL pointer vulnerability has been found in the the shim application of dp.c library. A missing NULL pointer could allow attackers to perform a denial of service attack on a system that uses shim application for UEFI bootloader.

Remediation

Vendor Workaround

The code could be modified to include NULL pointer checkers in the code. Before DevicePathToStr : "if (li == NULL || li->FilePath == NULL) return 0;" After DevicePathToStr : "if (bootpath == NULL) return 0;" At error: "if (bootpath != NULL)"

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Redhat rhel Els
CPEs cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
cpe:/a:redhat:enterprise_linux:8
cpe:/a:redhat:enterprise_linux:9
cpe:/o:redhat:rhel_els:7
Vendors & Products Redhat rhel Els
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description A NULL pointer vulnerability has been found in the the shim application of dp.c library. A missing NULL pointer could allow attackers to perform a denial of service attack on a system that uses shim application for UEFI bootloader.
Title Shim/dp.c library: null-pointer dereference in is_removable_media_path() when devicepathtostr() returns null
First Time appeared Redhat
Redhat enterprise Linux
Weaknesses CWE-476
CPEs cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
References
Metrics cvssV3_1

{'score': 3.9, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Nov 6, 2026, 6:09 PM
Reserved
Aug 10, 2026, 9:33 AM
Status
Awaiting Analysis
Published
Aug 10, 2026, 9:17 PM
Modified
Nov 6, 2026, 7:17 PM
Severity
Low
Public date
Aug 10, 2026, 9:00 AM