CVE-2021-3489

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).

Link	Resource
https://www.zerodayinitiative.com/advisories/ZDI-21-590/	Third Party Advisory VDB Entry
https://ubuntu.com/security/notices/USN-4949-1	Third Party Advisory
https://ubuntu.com/security/notices/USN-4950-1	Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=4b81ccebaeee885ab1aa1438133f2991e3a2b6ea	Patch Vendor Advisory
https://www.openwall.com/lists/oss-security/2021/05/11/10	Mailing List Third Party Advisory
https://security.netapp.com/advisory/ntap-20210716-0004/	Third Party Advisory

Configuration 1

cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.13:-:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* cpe:2.3:o:canonical:ubuntu_linux:20.10:*:*:*:*:*:*:* cpe:2.3:o:canonical:ubuntu_linux:21.04:*:*:*:*:*:*:*

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Published : 2021-06-04 02:15

Updated : 2021-09-14 02:30

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NVD link : CVE-2021-3489

Mitre link : CVE-2021-3489

No products.

CWE-787