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)
Metrics
CVSS 3.1 7.8/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux kernel | Linux kernel | >= 5.6-stable, < 5.6.1; >= 5.5-stable, < 5.5.14; >= 5.4.7, < 5.4-stable* |
References
- http://www.openwall.com/lists/oss-security/2021/07/20/1Exploit, Mailing List, Third Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/commit/?id=f2d67fec0b43edce8c416101cdc52e71145b5fefPatch, Vendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f2d67fec0b43edce8c416101cdc52e71145b5fefPatch, Vendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F7OONYGMSYBEFHLHZJK3GOI5Z553G4LD/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TF4PQZBEPNXDSK5DOBMW54OCLP25FTCD/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YXBWSHZ6DJIZVXKXGZPK6QPFCY7VKZEG/
- 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-4313-1Third Party Advisory
- https://www.openwall.com/lists/oss-security/2020/03/30/3Mailing List, Patch, Third Party Advisory
- https://www.thezdi.com/blog/2020/3/19/pwn2own-2020-day-one-resultsThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/07/20/1Exploit, Mailing List, Third Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/commit/?id=f2d67fec0b43edce8c416101cdc52e71145b5fefPatch, Vendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f2d67fec0b43edce8c416101cdc52e71145b5fefPatch, Vendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F7OONYGMSYBEFHLHZJK3GOI5Z553G4LD/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TF4PQZBEPNXDSK5DOBMW54OCLP25FTCD/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YXBWSHZ6DJIZVXKXGZPK6QPFCY7VKZEG/
- 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-4313-1Third Party Advisory
- https://www.openwall.com/lists/oss-security/2020/03/30/3Mailing List, Patch, Third Party Advisory
- https://www.thezdi.com/blog/2020/3/19/pwn2own-2020-day-one-resultsThird Party Advisory
Timeline
- Published
- Apr 2, 2020
- Last modified
- Jun 17, 2026
- NVD status
- Modified