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10 vulnerabilities found for grub2 by GNU
CVE-2026-97876 (GCVE-0-2026-97876)
Vulnerability from cvelistv5 – Published: 2026-10-02 10:34 – Updated: 2026-10-02 17:45
VLAI
EPSS
VEX
Title
Bypass of GRUB lockdown restriction in Secure Boot mode via serial command MMIO base address
Summary
A local attacker with control over GRUB's configuration can bypass lockdown restrictions when booting with Secure Boot and load an unsigned GRUB module, while GRUB continues to report lockdown is enabled.
The vulnerability is caused by insufficient validation of the MMIO base address passed to the GRUB serial command. GRUB does not validate that the base address corresponds to a UART device, rather than being an arbitrary memory address. This allows an attacker to trick GRUB into writing non-arbitrary data at an attacker-controlled address, including resetting the grub_file_verifiers list in a way that disables the subsequent verification of loaded modules.
Severity
6.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-02 17:44 UTC
CWE
- CWE-822 - Untrusted pointer dereference
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.openwall.com/lists/oss-security/2026/… | mailing-list |
| https://gitlab.freedesktop.org/gnu-grub/grub/-/co… | patch |
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CVE-2025-54770 (GCVE-0-2025-54770)
Vulnerability from cvelistv5 – Published: 2025-11-18 18:30 – Updated: 2026-09-01 11:53
VLAI
EPSS
VEX
Title
Grub2: use-after-free in net_set_vlan
Summary
A vulnerability has been identified in the GRUB2 bootloader's network module that poses an immediate Denial of Service (DoS) risk. This flaw is a Use-after-Free issue, caused because the net_set_vlan command is not properly unregistered when the network module is unloaded from memory. An attacker who can execute this command can force the system to access memory locations that are no longer valid. Successful exploitation leads directly to system instability, which can result in a complete crash and halt system availability
Severity
4.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-11-19 14:33 UTC
CWE
- CWE-825 - Expired Pointer Dereference
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2025-54770 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2413813 | issue-trackingx_refsource_REDHAT |
| https://lists.gnu.org/archive/html/grub-devel/202… | |
| http://www.openwall.com/lists/oss-security/2025/11/18/4 |
Impacted products
6 products
| Vendor | Product | Version | |
|---|---|---|---|
| GNU | grub2 |
Affected:
0 , ≤ 2.14
(semver)
|
|
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9
|
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4
|
Date Public
2025-11-18 00:00
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CVE-2025-61664 (GCVE-0-2025-61664)
Vulnerability from cvelistv5 – Published: 2025-11-18 18:20 – Updated: 2026-09-01 11:54
VLAI
EPSS
VEX
Title
Grub2: missing unregister call for normal_exit command may lead to use-after-free
Summary
A vulnerability in the GRUB2 bootloader has been identified in the normal module. This flaw, a memory Use After Free issue, occurs because the normal_exit command is not properly unregistered when its related module is unloaded. An attacker can exploit this condition by invoking the command after the module has been removed, causing the system to improperly access a previously freed memory location. This leads to a system crash or possible impacts in data confidentiality and integrity.
Severity
4.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-11-19 14:28 UTC
CWE
- CWE-825 - Expired Pointer Dereference
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2025-61664 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2414685 | issue-trackingx_refsource_REDHAT |
| https://lists.gnu.org/archive/html/grub-devel/202… |
Impacted products
6 products
| Vendor | Product | Version | |
|---|---|---|---|
| GNU | grub2 |
Affected:
0 , ≤ 2.14
(semver)
|
|
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9
|
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4
|
Date Public
2025-11-18 00:00
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CVE-2025-61663 (GCVE-0-2025-61663)
Vulnerability from cvelistv5 – Published: 2025-11-18 18:20 – Updated: 2026-09-01 11:53
VLAI
EPSS
VEX
Title
Grub2: missing unregister call for normal commands may lead to use-after-free
Summary
A vulnerability has been identified in the GRUB2 bootloader's normal command that poses an immediate Denial of Service (DoS) risk. This flaw is a Use-after-Free issue, caused because the normal command is not properly unregistered when the module is unloaded. An attacker who can execute this command can force the system to access memory locations that are no longer valid. Successful exploitation leads directly to system instability, which can result in a complete crash and halt system availability. Impact on the data integrity and confidentiality is also not discarded.
Severity
4.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-11-19 14:27 UTC
CWE
- CWE-825 - Expired Pointer Dereference
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2025-61663 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2414684 | issue-trackingx_refsource_REDHAT |
Impacted products
6 products
| Vendor | Product | Version | |
|---|---|---|---|
| GNU | grub2 |
Affected:
0 , ≤ 2.14
(semver)
|
|
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10
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|
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cpe:/o:redhat:enterprise_linux:7
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|
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|
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cpe:/o:redhat:enterprise_linux:9
|
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4
|
Date Public
2025-11-18 00:00
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CVE-2025-61662 (GCVE-0-2025-61662)
Vulnerability from cvelistv5 – Published: 2025-11-18 18:20 – Updated: 2026-09-01 11:53
VLAI
EPSS
VEX
Title
Grub2: missing unregister call for gettext command may lead to use-after-free
Summary
A Use-After-Free vulnerability has been discovered in GRUB's gettext module. This flaw stems from a programming error where the gettext command remains registered in memory after its module is unloaded. An attacker can exploit this condition by invoking the orphaned command, causing the application to access a memory location that is no longer valid. An attacker could exploit this vulnerability to cause grub to crash, leading to a Denial of Service. Possible data integrity or confidentiality compromise is not discarded.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-11-18 18:44 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
25 references
Impacted products
27 products
| Vendor | Product | Version | |
|---|---|---|---|
| GNU | grub2 |
Affected:
0 , ≤ 2.14
(semver)
|
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
1:2.12-29.el10_1.2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.1 |
|
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support |
Unaffected:
1:2.12-15.el10_0.2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux_eus:10.0 |
|
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support |
Unaffected:
1:2.02-0.87.el7_9.16 , < *
(rpm)
cpe:/o:redhat:rhel_els:7 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
1:2.02-170.el8_10.1 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:8::baseos |
|
| Red Hat | Red Hat Enterprise Linux 8.2 Advanced Update Support |
Unaffected:
1:2.02-87.el8_2.14 , < *
(rpm)
cpe:/o:redhat:rhel_aus:8.2::baseos |
|
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support |
Unaffected:
1:2.02-99.el8_4.13 , < *
(rpm)
cpe:/o:redhat:rhel_aus:8.4::baseos cpe:/o:redhat:rhel_eus_long_life:8.4::baseos |
|
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On |
Unaffected:
1:2.02-99.el8_4.13 , < *
(rpm)
cpe:/o:redhat:rhel_aus:8.4::baseos cpe:/o:redhat:rhel_eus_long_life:8.4::baseos |
|
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support |
Unaffected:
1:2.02-123.el8_6.19 , < *
(rpm)
cpe:/o:redhat:rhel_aus:8.6::baseos cpe:/o:redhat:rhel_e4s:8.6::baseos cpe:/o:redhat:rhel_tus:8.6::baseos |
|
| Red Hat | Red Hat Enterprise Linux 8.6 Telecommunications Update Service |
Unaffected:
1:2.02-123.el8_6.19 , < *
(rpm)
cpe:/o:redhat:rhel_aus:8.6::baseos cpe:/o:redhat:rhel_e4s:8.6::baseos cpe:/o:redhat:rhel_tus:8.6::baseos |
|
| Red Hat | Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions |
Unaffected:
1:2.02-123.el8_6.19 , < *
(rpm)
cpe:/o:redhat:rhel_aus:8.6::baseos cpe:/o:redhat:rhel_e4s:8.6::baseos cpe:/o:redhat:rhel_tus:8.6::baseos |
|
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service |
Unaffected:
1:2.02-152.el8_8.3 , < *
(rpm)
cpe:/o:redhat:rhel_e4s:8.8::baseos cpe:/o:redhat:rhel_tus:8.8::baseos |
|
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions |
Unaffected:
1:2.02-152.el8_8.3 , < *
(rpm)
cpe:/o:redhat:rhel_e4s:8.8::baseos cpe:/o:redhat:rhel_tus:8.8::baseos |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
1:2.06-114.el9_7.1 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:9::baseos |
|
| Red Hat | Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions |
Unaffected:
1:2.06-27.el9_0.23 , < *
(rpm)
cpe:/o:redhat:rhel_e4s:9.0::baseos |
|
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions |
Unaffected:
1:2.06-61.el9_2.11 , < *
(rpm)
cpe:/o:redhat:rhel_e4s:9.2::baseos |
|
| Red Hat | Red Hat Enterprise Linux 9.4 Extended Update Support |
Unaffected:
1:2.06-86.el9_4.4 , < *
(rpm)
cpe:/o:redhat:rhel_eus:9.4::baseos |
|
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support |
Unaffected:
1:2.06-105.el9_6.1 , < *
(rpm)
cpe:/o:redhat:rhel_eus:9.6::baseos |
|
| Red Hat | Red Hat OpenShift Container Platform 4.12 |
Unaffected:
412.86.202604010116-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.12::el8 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.13 |
Unaffected:
413.92.202604080111-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.13::el9 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.14 |
Unaffected:
414.92.202605060243-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.14::el9 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.15 |
Unaffected:
415.92.202605060220-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.15::el9 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.16 |
Unaffected:
416.94.202604211449-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.16::el9 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.17 |
Unaffected:
417.94.202605112123-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.17::el9 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.18 |
Unaffected:
418.94.202603181125-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.18::el9 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.19 |
Unaffected:
4.19.9.6.202604080618-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.19::el9 |
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4
|
Date Public
2025-11-18 00:00
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CVE-2025-61661 (GCVE-0-2025-61661)
Vulnerability from cvelistv5 – Published: 2025-11-18 18:20 – Updated: 2026-09-01 11:53
VLAI
EPSS
VEX
Title
Grub2: grub2: out-of-bounds write via malicious usb device
Summary
A vulnerability has been identified in the GRUB (Grand Unified Bootloader) component. This flaw occurs because the bootloader mishandles string conversion when reading information from a USB device, allowing an attacker to exploit inconsistent length values. A local attacker can connect a maliciously configured USB device during the boot sequence to trigger this issue. A successful exploitation may lead GRUB to crash, leading to a Denial of Service. Data corruption may be also possible, although given the complexity of the exploit the impact is most likely limited.
Severity
4.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-11-19 14:18 UTC
CWE
- CWE-131 - Incorrect Calculation of Buffer Size
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2025-61661 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2413827 | issue-trackingx_refsource_REDHAT |
| http://www.openwall.com/lists/oss-security/2025/11/18/8 |
Impacted products
6 products
| Vendor | Product | Version | |
|---|---|---|---|
| GNU | grub2 |
Affected:
0 , ≤ 2.14
(semver)
|
|
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9
|
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4
|
Date Public
2025-11-18 00:00
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CVE-2025-54771 (GCVE-0-2025-54771)
Vulnerability from cvelistv5 – Published: 2025-11-18 18:20 – Updated: 2026-09-01 11:53
VLAI
EPSS
VEX
Title
Grub2: use-after-free in grub_file_close()
Summary
A use-after-free vulnerability has been identified in the GNU GRUB (Grand Unified Bootloader). The flaw occurs because the file-closing process incorrectly retains a memory pointer, leaving an invalid reference to a file system structure. An attacker could exploit this vulnerability to cause grub to crash, leading to a Denial of Service. Possible data integrity or confidentiality compromise is not discarded.
Severity
4.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-11-19 14:17 UTC
CWE
- CWE-825 - Expired Pointer Dereference
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2025-54771 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2413823 | issue-trackingx_refsource_REDHAT |
| https://lists.gnu.org/archive/html/grub-devel/202… | |
| http://www.openwall.com/lists/oss-security/2025/11/18/3 |
Impacted products
6 products
| Vendor | Product | Version | |
|---|---|---|---|
| GNU | grub2 |
Affected:
0 , ≤ 2.14
(semver)
|
|
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9
|
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4
|
Date Public
2025-11-18 00:00
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CVE-2024-56737 (GCVE-0-2024-56737)
Vulnerability from cvelistv5 – Published: 2024-12-29 00:00 – Updated: 2024-12-31 18:17
VLAI
EPSS
VEX
Summary
GNU GRUB (aka GRUB2) through 2.12 has a heap-based buffer overflow in fs/hfs.c via crafted sblock data in an HFS filesystem.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-12-31 18:16 UTC
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://savannah.gnu.org/bugs/?66599 |
Impacted products
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CVE-2024-56738 (GCVE-0-2024-56738)
Vulnerability from cvelistv5 – Published: 2024-12-29 00:00 – Updated: 2024-12-31 18:15
VLAI
EPSS
VEX
Summary
GNU GRUB (aka GRUB2) through 2.12 does not use a constant-time algorithm for grub_crypto_memcmp and thus allows side-channel attacks.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-12-31 18:14 UTC
CWE
- CWE-208 - Observable Timing Discrepancy
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://savannah.gnu.org/bugs/?66603 |
Impacted products
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CVE-2024-2312 (GCVE-0-2024-2312)
Vulnerability from cvelistv5 – Published: 2024-04-05 19:40 – Updated: 2025-02-13 17:33
VLAI
EPSS
VEX
Summary
GRUB2 does not call the module fini functions on exit, leading to Debian/Ubuntu's peimage GRUB2 module leaving UEFI system table hooks after exit. This lead to a use-after-free condition, and could possibly lead to secure boot bypass.
Severity
6.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-08-21 15:39 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://bugs.launchpad.net/ubuntu/+source/grub2-u… | issue-tracking |
| https://cve.mitre.org/cgi-bin/cvename.cgi?name=CV… | issue-tracking |
| https://security.netapp.com/advisory/ntap-2024042… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Debian | Debian based GNU GRUB |
Affected:
0 , < 2.12-1ubuntu5
(semver)
|
|
| gnu | grub2 |
Affected:
0 , < 2.12-1ubuntu5
(semver)
cpe:2.3:a:gnu:grub2:-:*:*:*:*:*:*:* |
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