CVE-2021-31829

kernel/bpf/verifier.c in the Linux kernel through 5.12.1 performs undesirable speculative loads, leading to disclosure of stack content via side-channel attacks, aka CID-801c6058d14a. The specific concern is not protecting the BPF stack area against speculative loads. Also, the BPF stack can contain uninitialized data that might represent sensitive information previously operated on by the kernel.

• CWE-863

• http://www.openwall.com/lists/oss-security/2021/05/04/4Mailing List, Patch, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2021/05/04/4Mailing List, Patch, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2021/05/04/4Mailing List, Patch, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2021/05/04/4Mailing List, Patch, Third Party Advisory
• https://github.com/torvalds/linux/commit/801c6058d14a82179a7ee17a4b532cac6fad067fPatch, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2021/06/msg00019.htmlMailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VWCZ6LJLENL2C3URW5ICARTACXPFCFN2/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y4X2G5YAPYJGI3PFEZZNOTRYI33GOCCZ/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZI7OBCJQDNWMKLBP6MZ5NV4EUTDAMX6Q/
• http://www.openwall.com/lists/oss-security/2021/05/04/4Mailing List, Patch, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2021/05/04/4Mailing List, Patch, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2021/05/04/4Mailing List, Patch, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2021/05/04/4Mailing List, Patch, Third Party Advisory
• https://github.com/torvalds/linux/commit/801c6058d14a82179a7ee17a4b532cac6fad067fPatch, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2021/06/msg00019.htmlMailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VWCZ6LJLENL2C3URW5ICARTACXPFCFN2/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y4X2G5YAPYJGI3PFEZZNOTRYI33GOCCZ/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZI7OBCJQDNWMKLBP6MZ5NV4EUTDAMX6Q/

Published

May 6, 2021

Last Modified

Jun 17, 2026

Status

Modified

• Uncovering a hidden BOLA in Appsmith's snapshot logicStrix autonomously discovered a BOLA/IDOR vulnerability in Appsmith's snapshot deletion path.
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