RHSA-2025:20532
Vulnerability from csaf_redhat - Published: 2025-11-11 08:55 - Updated: 2026-01-29 17:02Summary
Red Hat Security Advisory: grub2 security update
Notes
Topic
An update for grub2 is now available for Red Hat Enterprise Linux 9.
Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details
The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and customizable boot loader with modular architecture. The packages support a variety of kernel formats, file systems, computer architectures, and hardware devices.
Security Fix(es):
* grub2: grub-core/gettext: Integer overflow leads to Heap OOB Write. (CVE-2024-45777)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Additional Changes:
For detailed information on changes in this release, see the Red Hat Enterprise Linux 9 Release Notes linked from the References section.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
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"text": "2346343"
}
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{
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"text": "A flaw was found in grub2. The calculation of the translation buffer when reading a language .mo file in grub_gettext_getstr_from_position() may overflow, leading to a Out-of-bound write. This issue can be leveraged by an attacker to overwrite grub2\u0027s sensitive heap data, eventually leading to the circumvention of secure boot protections.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "grub2: grub-core/gettext: Integer overflow leads to Heap OOB Write.",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "The Red Hat Product Security team has rated this vulnerability with a Moderate severity due to the high privileges required to exploit this flaw.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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},
{
"category": "external",
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},
{
"category": "external",
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"url": "https://www.cve.org/CVERecord?id=CVE-2024-45777"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2024-45777",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-45777"
}
],
"release_date": "2025-02-18T18:00:00+00:00",
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{
"category": "vendor_fix",
"date": "2025-11-11T08:55:23+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"details": "Moderate"
}
],
"title": "grub2: grub-core/gettext: Integer overflow leads to Heap OOB Write."
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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