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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | shim | No fix yet | — |
| Debian 13 | shim | No fix yet | — |
| Debian 12 | shim | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | shim +2 | No fix yet | — |
| Ubuntu 26.04 LTS | shim +2 | No fix yet | — |
| Ubuntu 24.04 LTS | shim +2 | No fix yet | — |
| Ubuntu 22.04 LTS | shim +2 | No fix yet | — |
| Ubuntu 20.04 LTS | shim +2 | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | shim +2 | No fix yet | — |
| Ubuntu 16.04 LTS | shim +2 | No fix yet | — |
| Ubuntu 14.04 LTS | shim +2 | No fix yet | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | shim-unsigned-x64 +1 | No fix yet | — |
References
- https://access.redhat.com/security/cve/CVE-2026-19411 vdb-entry
- RHBZ#2513060 issue-tracking