CVE-2022-48770 bpf: Guard against accessing NULL pt_regs in bpf_get_task_stack()

What is CVE-2022-48770?

CVE-2022-48770 is a medium-severity vulnerability in Linux kernel, published on 20 Jun 2024. 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:

bpf: Guard against accessing NULL pt_regs in bpf_get_task_stack()

task_pt_regs() can return NULL on powerpc for kernel threads. This is then used in __bpf_get_stack() to check for user mode, resulting in a kernel oops. Guard against this by checking return value of task_pt_regs() before trying to obtain the call chain.

Weakness: CWE-476

Which versions are affected by CVE-2022-48770?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2022-48770?

Apply the vendor's patch.

Is CVE-2022-48770 being exploited?

There is no known exploitation of CVE-2022-48770 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-2022-48770, GHSA-qx5f-76wj-2xm5, UBUNTU-CVE-2022-48770.