CVE-2021-29154 Code injection in n/a

What is CVE-2021-29154?

CVE-2021-29154 is a high-severity code injection vulnerability in Debian Debian Linux, published on 8 Apr 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

BPF JIT compilers in the Linux kernel through 5.11.12 have incorrect computation of branch displacements, allowing them to execute arbitrary code within the kernel context. This affects arch/x86/net/bpf_jit_comp.c and arch/x86/net/bpf_jit_comp32.c.

Weakness: CWE-77

Which versions are affected by CVE-2021-29154?

It affects 13 products.

Products include Debian Debian Linux, Fedoraproject Fedora, Linux kernel, Netapp Cloud Backup, Netapp H300e Firmware, Netapp H300s Firmware and 7 more.

How do I fix CVE-2021-29154?

Apply the vendor's patch.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2021-29154 being exploited?

There is no known exploitation of CVE-2021-29154 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

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

Also known as A-185462528, AZL-6544, DEBIAN-CVE-2021-29154, GHSA-q7mp-r58x-5fjf, PUB-A-185462528, UBUNTU-CVE-2021-29154.