Description
A remote code execution vulnerability was found in Shim. The Shim boot support trusts attacker-controlled values when parsing an HTTP response. This flaw allows an attacker to craft a specific malicious HTTP request, leading to a completely controlled out-of-bounds write primitive and complete system compromise. This flaw is only exploitable during the early boot phase, an attacker needs to perform a Man-in-the-Middle or compromise the boot server to be able to exploit this vulnerability successfully.
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 8.2 Advanced Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 8.2 Telecommunications Update Service | — | — |
| Red Hat | Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions | — | — |
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 8.4 Telecommunications Update Service | — | — |
| Red Hat | Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions | — | — |
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 8.8 Extended Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat Enterprise Linux 9.0 Extended Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 9.2 Extended Update Support | — | — |
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 | 15.8-1 | — |
| Debian 13 | shim | 15.8-1 | — |
| Debian 12 | shim | 15.8-1~deb12u1 | — |
| Debian 10 | shim | 15.8-1~deb10u1 | DLA-3813-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | shim | 15.8-0ubuntu1 | — |
| Ubuntu 24.04 LTS | shim-signed | 1.58 | — |
| Ubuntu 22.04 LTS | shim | 15.8-0ubuntu1 | — |
| Ubuntu 22.04 LTS | shim-signed | 1.51.4 | — |
| Ubuntu 20.04 LTS | shim | 15.8-0ubuntu1 | — |
| Ubuntu 20.04 LTS | shim-signed | 1.40.10 | — |
| Ubuntu 18.04 LTS | shim +1 | No fix yet | — |
| Ubuntu 16.04 LTS | shim +1 | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | shim +1 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | shim +2 | 15.8-4.el9_3 | RHSA-2024:1903 |
| RHEL 8 | shim +3 | 15.8-4.el8_9 | RHSA-2024:1902 |
| RHEL 7 | mokutil +3 | 15.8-1.el7 | RHSA-2024:1959 |
| RHEL 7 | shim +2 | 15.8-3.el7 | RHSA-2024:1959 |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.2 EUS | shim +2 | 15.8-3.el9_2 | RHSA-2024:1876 |
| RHEL 9.0 EUS | shim +2 | 15.8-3.el9 | RHSA-2024:1835 |
| RHEL 9.0 EUS | shim-unsigned-x64 +1 | 15.8-2.el9 | RHSA-2024:1835 |
| RHEL 8.8 EUS | shim +4 | 15.8-2.el8 | RHSA-2024:1883 |
| RHEL 8.6 EUS | shim +3 | 15.8-2.el8_6 | RHSA-2024:2086 |
| RHEL 8.4 TUS | shim +2 | 15.8-2.el8_4 | RHSA-2024:1873 |
| RHEL 8.4 E4S | shim +2 | 15.8-2.el8_4 | RHSA-2024:1873 |
| RHEL 8.4 AUS | shim +2 | 15.8-2.el8_4 | RHSA-2024:1873 |
| RHEL 8.2 TUS | shim +2 | 15.8-2.el8_2 | RHSA-2024:1834 |
| RHEL 8.2 E4S | shim +2 | 15.8-2.el8_2 | RHSA-2024:1834 |
| RHEL 8.2 AUS | shim +2 | 15.8-2.el8_2 | RHSA-2024:1834 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | shim-x64 +1 | 15.8-4.el9_3.alma.1 | ALSA-2024:1903 |
| AlmaLinux 8 | shim-x64 +2 | 15.8-4.el8_9.alma.1 | ALSA-2024:1902 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | shim | 15.8-150300.4.20.2 | SUSE-SU-2024:1368-1 |
| SLES 15 SP4 | shim | 15.8-150300.4.20.2 | SUSE-SU-2024:1368-1 |
| SLES 15 SP3 | shim | 15.8-150300.4.20.2 | SUSE-SU-2024:1368-1 |
| SLES 15 SP2 | shim | 15.8-150100.3.38.1 | SUSE-SU-2024:1461-1 |
| SLES 12 SP5 | shim | 15.8-25.30.1 | SUSE-SU-2024:1462-1 |
Show 16 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP4 | shim | 15.8-150300.4.20.2 | SUSE-SU-2024:1368-1 |
| SLES for SAP 15 SP3 | shim | 15.8-150300.4.20.2 | SUSE-SU-2024:1368-1 |
| SLES for SAP 15 SP2 | shim | 15.8-150100.3.38.1 | SUSE-SU-2024:1461-1 |
| SLES for SAP 12 SP5 | shim | 15.8-25.30.1 | SUSE-SU-2024:1462-1 |
| SLE Micro 6.0 | pcr-oracle | 0.4.6-2.1 | SUSE-SU-2025:20136-1 |
| SLE Micro 6.0 | shim | 15.8-1.1 | SUSE-SU-2025:20136-1 |
| SLE Micro 5.5 | shim | 15.8-150300.4.20.2 | SUSE-SU-2024:1368-1 |
| SLE Micro 5.4 | shim | 15.8-150300.4.20.2 | SUSE-SU-2024:1368-1 |
| SLE Micro 5.3 | shim | 15.8-150300.4.20.2 | SUSE-SU-2024:1368-1 |
| SLE Micro 5.2 | shim | 15.8-150300.4.20.2 | SUSE-SU-2024:1368-1 |
| SLE Micro 5.1 | shim | 15.8-150300.4.20.2 | SUSE-SU-2024:1368-1 |
| SLE HPC 15 SP4 | shim | 15.8-150300.4.20.2 | SUSE-SU-2024:1368-1 |
| SLE HPC 15 SP3 | shim | 15.8-150300.4.20.2 | SUSE-SU-2024:1368-1 |
| SLE HPC 15 SP2 | shim | 15.8-150100.3.38.1 | SUSE-SU-2024:1461-1 |
| SUSE Manager Server 4.3 | shim | 15.8-150300.4.20.2 | SUSE-SU-2024:1368-1 |
| SUSE Manager Proxy 4.3 | shim | 15.8-150300.4.20.2 | SUSE-SU-2024:1368-1 |
| SUSE Enterprise Storage 7.1 | shim | 15.8-150300.4.20.2 | SUSE-SU-2024:1368-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.5 | shim | 15.8-150300.4.20.2 | SUSE-SU-2024:1368-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap Micro 5.4 | shim | 15.8-150300.4.20.2 | SUSE-SU-2024:1368-1 |
| openSUSE Leap Micro 5.3 | shim | 15.8-150300.4.20.2 | SUSE-SU-2024:1368-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | shim-unsigned-x64 +1 | 12-1.amzn2.0.4 | ALAS2-2024-2484 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | shim +2 | 15.8-3 | — |
| Azure Linux 2 (CBL-Mariner) | shim +1 | 15.8-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | shim-x64 +1 | 15.8-1.0.3.el9 | ELSA-2024-1903 |
| Oracle Linux 8 | shim-x64 +2 | 15.8-4.0.1.el8 | ELSA-2024-1902 |
| Oracle Linux 7 | mokutil +1 | 15.8-1.0.3.el7 | ELSA-2024-1959 |
| Oracle Linux 7 | shim-unsigned-x64 | 15.8-2.0.3.el7 | ELSA-2024-1959 |
Advisories 26
- ALSA-2024:1903 Important: shim bug fix update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:1902 Important: shim security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2024:2086 Red Hat Security Advisory: shim security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2024:1903 Red Hat Security Advisory: shim bug fix update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2024:1959 Red Hat Security Advisory: shim security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2024:1883 Red Hat Security Advisory: shim security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2024:1902 Red Hat Security Advisory: shim security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2024:1876 Red Hat Security Advisory: shim bug fix update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2024:1873 Red Hat Security Advisory: shim security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2024:1835 Red Hat Security Advisory: shim security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2024:1834 Red Hat Security Advisory: shim security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- SUSE-SU-2025:20136-1 Security update for pcr-oracle, shim SUSE / openSUSE Security Updates · Mar 23, 2026
- DLA-3813-1 shim - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2024:1462-1 Security update for shim SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:1461-1 Security update for shim SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2024-0903 Red Hat Enterprise Linux (shim): Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 3, 2025
- WID-SEC-2024-0326 Linux "Shim": Schwachstelle ermöglicht Übernahme der Kontrolle BSI CERT-Bund (WID) · Jun 3, 2025
- SUSE-SU-2024:1368-1 Security update for shim SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2024-1313 IBM QRadar SIEM: Mehrere Schwachstellen BSI CERT-Bund (WID) · Dec 1, 2024
- WID-SEC-2024-2100 IBM Power Hardware Management Console: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 10, 2024
- NCSC-2024-0334 Kwetsbaarheden verholpen in Microsoft Windows NCSC-NL (Netherlands) · Aug 27, 2024
- WID-SEC-2024-1835 Microsoft Windows: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 26, 2024
- ELSA-2024-1959 Important: shim security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · May 1, 2024
- ELSA-2024-1902 Important: shim security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Apr 25, 2024
- ELSA-2024-1903 Important: shim bug fix update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Apr 22, 2024
- ALAS2-2024-2484 Important: shim security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Mar 4, 2024
References
- RHSA-2024:1834 vendor-advisory
- RHSA-2024:1835 vendor-advisory
- RHSA-2024:1873 vendor-advisory
- RHSA-2024:1876 vendor-advisory
- RHSA-2024:1883 vendor-advisory
- RHSA-2024:1902 vendor-advisory
- RHSA-2024:1903 vendor-advisory
- RHSA-2024:1959 vendor-advisory
- RHSA-2024:2086 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2023-40547 vdb-entry
- RHBZ#2234589 issue-tracking