CVE-2020-14308 Integer overflow in Grub
An integer overflow in the GRUB memory allocator allows attackers to cause integrity, confidentiality, and availability impacts during the boot process.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-14308?
CVE-2020-14308 is a medium-severity vulnerability in Opensuse Leap, published on 29 Jul 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In grub2 versions before 2.06 the grub memory allocator doesn't check for possible arithmetic overflows on the requested allocation size. This leads the function to return invalid memory allocations which can be further used to cause possible integrity, confidentiality and availability impacts during the boot process.
Weakness: CWE-190
Which versions are affected by CVE-2020-14308?
It affects 2 products.
Products include Gnu Grub2, Opensuse Leap.
How do I fix CVE-2020-14308?
Upgrade to a fixed version.
Is CVE-2020-14308 being exploited?
There is no known exploitation of CVE-2020-14308 in the wild and no public exploit code.
Other vulnerabilities in Opensuse Leap
- CVE-2024-56737 Memory corruption in GRUB2
- CVE-2022-28733 Integer underflow in grub_net_recv_ip4_packets
- CVE-2022-28734 Out-of-bounds write when handling split HTTP headers
- CVE-2025-61662 Grub2: missing unregister call for gettext command may lead to use-after-free
- CVE-2024-45782 Grub2: fs/hfs: strcpy() using the volume name (fs/hfs.c:382)
Sources
Also known as ALPINE-CVE-2020-14308, AZL-6456, DEBIAN-CVE-2020-14308, GHSA-6f8f-rchr-mhp3, UBUNTU-CVE-2020-14308.