CVE-2020-8835
Linux kernel bpf verifier vulnerability
- State
- Published
- Severity
- 7.8 High
- Published
- Apr 2, 2020
- Updated
- Sep 17, 2024
- Reserved
- Feb 10, 2020
Description
In the Linux kernel 5.5.0 and newer, the bpf verifier (kernel/bpf/verifier.c) did not properly restrict the register bounds for 32-bit operations, leading to out-of-bounds reads and writes in kernel memory. The vulnerability also affects the Linux 5.4 stable series, starting with v5.4.7, as the introducing commit was backported to that branch. This vulnerability was fixed in 5.6.1, 5.5.14, and 5.4.29. (issue is aka ZDI-CAN-10780)
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.8 High | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H | canonical |
Weaknesses
The record names no weakness.
Affected Products
| Product | Versions |
|---|---|
Linux kernelLinux kernel |
|
References
- USN-4313-1vendor-advisory
- https://www.thezdi.com/blog/2020/3/19/pwn2own-2020-day-one-results
- https://lore.kernel.org/bpf/20200330160324.15259-1-daniel%40iogearbox.net/T/
- https://www.openwall.com/lists/oss-security/2020/03/30/3
- https://usn.ubuntu.com/usn/usn-4313-1
- https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/commit/?id=f2d67fec0b43edce8c416101cdc52e71145b5fef
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f2d67fec0b43edce8c416101cdc52e71145b5fef
- FEDORA-2020-4ef0bcc89cvendor-advisory
- FEDORA-2020-666f3b1ac3vendor-advisory
- FEDORA-2020-73c00eda1cvendor-advisory
- https://security.netapp.com/advisory/ntap-20200430-0004/
- [oss-security] 20210720 CVE-2021-33909: size_t-to-int vulnerability in Linux's filesystem layermailing-list
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