Red Hat Security Advisory: grub2 security update

Fixed packages 23

Vulnerabilities 5

• Medium 6.7
  CVE-2024-45776

  Grub2: grub-core/gettext: integer overflow leads to heap oob write and read.

  When reading the language .mo file in grub_mofile_open(), grub2 fails to verify an integer overflow when allocating its internal buffer. A crafted .mo file may lead the buffer size calculation to overflow, leading to out-of-bound reads and writes. This flaw a…

  Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 7 Linux Debian Ubuntu Azure Linux
  Feb 18, 2025
• Medium 6.7
  CVE-2024-45781

  Grub2: fs/ufs: oob write in the heap

  A flaw was found in grub2. When reading a symbolic link's name from a UFS filesystem, grub2 fails to validate the string length taken as an input. The lack of validation may lead to a heap out-of-bounds write, causing data integrity issues and eventually allo…

  Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 7 Linux Debian Ubuntu Azure Linux
  Feb 18, 2025
• Medium 6.4
  CVE-2025-0622

  Grub2: command/gpg: use-after-free due to hooks not being removed on module unload

  A flaw was found in command/gpg. In some scenarios, hooks created by loaded modules are not removed when the related module is unloaded. This flaw allows an attacker to force grub2 to call the hooks once the module that registered it was unloaded, leading to …

  Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 7 Linux Debian Ubuntu Azure Linux
  Feb 18, 2025
• Medium 6.4
  CVE-2025-0677

  Grub2: ufs: integer overflow may lead to heap based out-of-bounds write when handling symlinks

  A flaw was found in grub2. When performing a symlink lookup, the grub's UFS module checks the inode's data size to allocate the internal buffer to read the file content, however, it fails to check if the symlink data size has overflown. When this occurs, grub…

  Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 7 Linux Debian Ubuntu Azure Linux
  Feb 19, 2025
• Medium 4.4
  CVE-2025-1118

  Grub2: commands/dump: the dump command is not in lockdown when secure boot is enabled

  A flaw was found in grub2. Grub's dump command is not blocked when grub is in lockdown mode, which allows the user to read any memory information, and an attacker may leverage this in order to extract signatures, salts, and other sensitive information from th…

  Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 7 Linux Debian Ubuntu Azure Linux
  Feb 19, 2025

References

• article
  https://access.redhat.com/security/updates/classification/#moderate
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2339182
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2345857
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2345865
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2346116
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2346137
• article
  https://issues.redhat.com/browse/RHEL-98679
• article
  https://issues.redhat.com/browse/RHEL-98682
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2025/rhsa-2025_16154.json
• report
  https://access.redhat.com/security/cve/CVE-2024-45776
• advisory
  https://www.cve.org/CVERecord?id=CVE-2024-45776
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2024-45776
• report
  https://access.redhat.com/security/cve/CVE-2024-45781
• advisory
  https://www.cve.org/CVERecord?id=CVE-2024-45781
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2024-45781
• report
  https://access.redhat.com/security/cve/CVE-2025-0622
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-0622
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-0622
• article
  https://lists.gnu.org/archive/html/grub-devel/2025-02/msg00024.html
• report
  https://access.redhat.com/security/cve/CVE-2025-0677
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-0677
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-0677
• report
  https://access.redhat.com/security/cve/CVE-2025-1118
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-1118
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-1118
• article
  https://git.savannah.gnu.org/cgit/grub.git/commit/?id=34824806ac6302f91e8cabaa41308eaced25725f