Description (CNA)
The eBPF RINGBUF bpf_ringbuf_reserve() function in the Linux kernel did not check that the allocated size was smaller than the ringbuf size, allowing an attacker to perform out-of-bounds writes within the kernel and therefore, arbitrary code execution. This issue was fixed via commit 4b81ccebaeee ("bpf, ringbuf: Deny reserve of buffers larger than ringbuf") (v5.13-rc4) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. It was introduced via 457f44363a88 ("bpf: Implement BPF ring buffer and verifier support for it") (v5.8-rc1).
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux kernel | affected trunk before v5.13-rc4; affected linux-5.12.y before v5.12.4; affected linux-5.11.y before v5.11.21; affected linux-5.10.y before v5.10.37; affected v5.8 before 5.8* |
CWE
CWE-119, CWE-787
References
- https://www.openwall.com/lists/oss-security/2021/05/11/10
- https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=4b81ccebaeee885ab1aa1438133f2991e3a2b6ea
- https://www.zerodayinitiative.com/advisories/ZDI-21-590/
- https://ubuntu.com/security/notices/USN-4950-1
- https://ubuntu.com/security/notices/USN-4949-1
- https://security.netapp.com/advisory/ntap-20210716-0004/
ADP enrichment
No English description supplied.
- https://www.openwall.com/lists/oss-security/2021/05/11/10
- https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=4b81ccebaeee885ab1aa1438133f2991e3a2b6ea
- https://www.zerodayinitiative.com/advisories/ZDI-21-590/
- https://ubuntu.com/security/notices/USN-4950-1
- https://ubuntu.com/security/notices/USN-4949-1
- https://security.netapp.com/advisory/ntap-20210716-0004/