CVE-2022-49280 NFSD: prevent underflow in nfssvc_decode_writeargs()

What is CVE-2022-49280?

CVE-2022-49280 is a critical vulnerability in Linux kernel, published on 26 Feb 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In the Linux kernel, the following vulnerability has been resolved:

NFSD: prevent underflow in nfssvc_decode_writeargs()

Smatch complains:

fs/nfsd/nfsxdr.c:341 nfssvc_decode_writeargs() warn: no lower bound on 'args->len'

Change the type to unsigned to prevent this issue.

Weakness: CWE-191

Which versions are affected by CVE-2022-49280?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2022-49280?

Apply the vendor's patch.

Is CVE-2022-49280 being exploited?

There is no known exploitation of CVE-2022-49280 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 DEBIAN-CVE-2022-49280, GHSA-3qrr-xcc2-m7cg, UBUNTU-CVE-2022-49280.