CVE-2025-37927 iommu/amd: Fix potential buffer overflow in parse_ivrs_acpihid
A buffer overflow in the Linux kernel's AMD IOMMU driver allows attackers to potentially execute arbitrary code or escalate privileges via crafted ACPI data.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-37927?
CVE-2025-37927 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 20 May 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
iommu/amd: Fix potential buffer overflow in parse_ivrs_acpihid
There is a string parsing logic error which can lead to an overflow of hid or uid buffers. Comparing ACPIID_LEN against a total string length doesn't take into account the lengths of individual hid and uid buffers so the check is insufficient in some cases. For example if the length of hid string is 4 and the length of the uid string is 260, the length of str will be equal to ACPIID_LEN + 1 but uid string will overflow uid buffer which size is 256.
The same applies to the hid string with length 13 and uid string with length 250.
Check the length of hid and uid strings separately to prevent buffer overflow.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Weakness: CWE-787
Which versions are affected by CVE-2025-37927?
It affects 2 products.
Products include Debian Debian Linux, Linux kernel.
How do I fix CVE-2025-37927?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-37927 being exploited?
There is no known exploitation of CVE-2025-37927 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as BELL-CVE-2025-37927, DEBIAN-CVE-2025-37927, GHSA-jrcg-ffmc-qfvv, ROOT-OS-DEBIAN-11-CVE-2025-37927, ROOT-OS-DEBIAN-12-CVE-2025-37927, ROOT-OS-UBUNTU-2204-CVE-2025-37927 and 2 more.