CVE-2025-21782 orangefs: fix a oob in orangefs_debug_write

What is CVE-2025-21782?

CVE-2025-21782 is a high-severity memory corruption vulnerability in Linux kernel, published on 27 Feb 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:

orangefs: fix a oob in orangefs_debug_write

I got a syzbot report: slab-out-of-bounds Read in orangefs_debug_write... several people suggested fixes, I tested Al Viro's suggestion and made this patch.

Weakness: CWE-125

Which versions are affected by CVE-2025-21782?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2025-21782?

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-2025-21782 being exploited?

There is no known exploitation of CVE-2025-21782 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-57971, BELL-CVE-2025-21782, DEBIAN-CVE-2025-21782, GHSA-pqvw-v4j9-3frp, ROOT-OS-UBUNTU-2404-CVE-2025-21782, UBUNTU-CVE-2025-21782.