CVE-2022-49548: bpf: Fix potential array overflow in bpf_trampoline_get_progs()
First published: Wed Feb 26 2025(Updated: )
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix potential array overflow in bpf_trampoline_get_progs() The cnt value in the 'cnt >= BPF_MAX_TRAMP_PROGS' check does not include BPF_TRAMP_MODIFY_RETURN bpf programs, so the number of the attached BPF_TRAMP_MODIFY_RETURN bpf programs in a trampoline can exceed BPF_MAX_TRAMP_PROGS. When this happens, the assignment '*progs++ = aux->prog' in bpf_trampoline_get_progs() will cause progs array overflow as the progs field in the bpf_tramp_progs struct can only hold at most BPF_MAX_TRAMP_PROGS bpf programs.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | ||
| Linux Kernel | >=5.7<5.10.120 | |
| Linux Kernel | >=5.11<5.15.45 | |
| Linux Kernel | >=5.16<5.17.13 | |
| Linux Kernel | >=5.18<5.18.2 |
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Reference Links
- https://git.kernel.org/stable/c/7f845de2863334bed4f362e95853f5e7bc323737
- https://git.kernel.org/stable/c/e36452d5da6325df7c10cffc60a9e68d21e2606d
- https://git.kernel.org/stable/c/32c4559c61652f24c9fdd5440342196fe37453bc
- https://git.kernel.org/stable/c/4f8897bcc20b9ae44758e0572538d741ab66f0dc
- https://git.kernel.org/stable/c/a2aa95b71c9bbec793b5c5fa50f0a80d882b3e8d
Frequently Asked Questions
What is the severity of CVE-2022-49548?
CVE-2022-49548 has been classified with a moderate severity level due to its potential to cause an array overflow in the Linux kernel.
How do I fix CVE-2022-49548?
To fix CVE-2022-49548, you should update your Linux kernel to a patched version that addresses the overflow issue.
Which versions of Linux kernel are affected by CVE-2022-49548?
CVE-2022-49548 affects Linux kernel versions from 5.7 to 5.18.2, excluding certain contained versions.
What impact does CVE-2022-49548 have on system performance?
While CVE-2022-49548 primarily concerns security, it could potentially impact system stability if exploited.
Is CVE-2022-49548 actively being exploited?
As of now, there are no public reports indicating active exploitation of CVE-2022-49548.
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