CVE-2026-46070 md/raid5: validate payload size before accessing journal metadata
A corrupted RAID5 journal can cause out-of-bounds reads in the Linux kernel, potentially leading to crashes or information disclosure.
- 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-2026-46070?
CVE-2026-46070 is a high-severity memory corruption vulnerability in Linux kernel, published on 27 May 2026. 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:
md/raid5: validate payload size before accessing journal metadata
r5c_recovery_analyze_meta_block() and r5l_recovery_verify_data_checksum_for_mb() iterate over payloads in a journal metadata block using on-disk payload size fields without validating them against the remaining space in the metadata block.
A corrupted journal contains payload sizes extending beyond the PAGE_SIZE boundary can cause out-of-bounds reads when accessing payload fields or computing offsets.
Add bounds validation for each payload type to ensure the full payload fits within meta_size before processing.
Which versions are affected by CVE-2026-46070?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-46070?
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-2026-46070 being exploited?
There is no known exploitation of CVE-2026-46070 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-88449, BELL-CVE-2026-46070, DEBIAN-CVE-2026-46070, GHSA-76hh-2v3c-vm3v, ROOT-OS-DEBIAN-11-CVE-2026-46070, ROOT-OS-DEBIAN-12-CVE-2026-46070 and 3 more.