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Vulnerability record · CVE-2020-8835 · published 2 April 2020

CVE-2020-8835: Linux kernel out-of-bounds read vulnerability

Linux · Linux Kernel

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)

7.8 CVSS 3.1 High EPSS 6.0% · top 6.9% CWE-125 · Out-of-bounds readCWE-787 · Out-of-bounds write
7.8CVSS 3.1 base score, v2 7.2
6.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
27Affected product versions listed by NVD
24References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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)

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

27 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.openwall.com/lists/oss-security/2021/07/20/1 ExploitMailing ListThird Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/commit/?id=f2d67fec0b43edce8c416101cdc52e71145b5fef PatchVendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f2d67fec0b43edce8c416101cdc52e71145b5fef PatchVendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F7OONYGMSYBEFHLHZJK3GOI
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TF4PQZBEPNXDSK5DOBMW54O
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YXBWSHZ6DJIZVXKXGZPK6QP
https://lore.kernel.org/bpf/20200330160324.15259-1-daniel%40iogearbox.net/T/
https://security.netapp.com/advisory/ntap-20200430-0004/ Third Party Advisory
https://usn.ubuntu.com/4313-1/ Third Party Advisory
https://usn.ubuntu.com/usn/usn-4313-1 Third Party Advisory
https://www.openwall.com/lists/oss-security/2020/03/30/3 Mailing ListPatchThird Party Advisory
https://www.thezdi.com/blog/2020/3/19/pwn2own-2020-day-one-results Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/07/20/1 ExploitMailing ListThird Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/commit/?id=f2d67fec0b43edce8c416101cdc52e71145b5fef PatchVendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f2d67fec0b43edce8c416101cdc52e71145b5fef PatchVendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F7OONYGMSYBEFHLHZJK3GOI
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TF4PQZBEPNXDSK5DOBMW54O
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YXBWSHZ6DJIZVXKXGZPK6QP
https://lore.kernel.org/bpf/20200330160324.15259-1-daniel%40iogearbox.net/T/
https://security.netapp.com/advisory/ntap-20200430-0004/ Third Party Advisory
https://usn.ubuntu.com/4313-1/ Third Party Advisory
https://usn.ubuntu.com/usn/usn-4313-1 Third Party Advisory
https://www.openwall.com/lists/oss-security/2020/03/30/3 Mailing ListPatchThird Party Advisory
https://www.thezdi.com/blog/2020/3/19/pwn2own-2020-day-one-results Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2020-8835), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.