CVE-2021-47276

In the Linux kernel, the following vulnerability has been resolved: ftrace: Do not blindly read the ip address in ftrace_bug() It was reported that a bug on arm64 caused a bad ip address to be used for updating into a nop in ftrace_init(), but the error path (rightfully) returned -EINVAL and not -EFAULT, as the bug caused more than one error to occur. But because -EINVAL was returned, the ftrace_bug() tried to report what was at the location of the ip address, and read it directly. This caused the machine to panic, as the ip was not pointing to a valid memory address. Instead, read the ip address with copy_from_kernel_nofault() to safely access the memory, and if it faults, report that the address faulted, otherwise report what was in that location.

• CWE-706

• https://git.kernel.org/stable/c/0bc62e398bbd9e600959e610def5109957437b28Patch
• https://git.kernel.org/stable/c/3e4ddeb68751fb4fb657199aed9cfd5d02796875Patch
• https://git.kernel.org/stable/c/4aedc2bc2b32c93555f47c95610efb89cc1ec09bPatch
• https://git.kernel.org/stable/c/6c14133d2d3f768e0a35128faac8aa6ed4815051Patch
• https://git.kernel.org/stable/c/7e4e824b109f1d41ccf223fbb0565d877d6223a2Patch
• https://git.kernel.org/stable/c/862dcc14f2803c556bdd73b43c27b023fafce2fbPatch
• https://git.kernel.org/stable/c/97524384762c1fb9b3ded931498dd2047bd0de81Patch
• https://git.kernel.org/stable/c/acf671ba79c1feccc3ec7cfdcffead4efcec49e7Patch
• https://git.kernel.org/stable/c/0bc62e398bbd9e600959e610def5109957437b28Patch
• https://git.kernel.org/stable/c/3e4ddeb68751fb4fb657199aed9cfd5d02796875Patch
• https://git.kernel.org/stable/c/4aedc2bc2b32c93555f47c95610efb89cc1ec09bPatch
• https://git.kernel.org/stable/c/6c14133d2d3f768e0a35128faac8aa6ed4815051Patch
• https://git.kernel.org/stable/c/7e4e824b109f1d41ccf223fbb0565d877d6223a2Patch
• https://git.kernel.org/stable/c/862dcc14f2803c556bdd73b43c27b023fafce2fbPatch
• https://git.kernel.org/stable/c/97524384762c1fb9b3ded931498dd2047bd0de81Patch
• https://git.kernel.org/stable/c/acf671ba79c1feccc3ec7cfdcffead4efcec49e7Patch

Published

May 21, 2024

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2021-47270In the Linux kernel, the following vulnerability has been re…5.5
• CVE-2021-47271In the Linux kernel, the following vulnerability has been re…5.5
• CVE-2021-47272In the Linux kernel, the following vulnerability has been re…5.5
• CVE-2021-47273In the Linux kernel, the following vulnerability has been re…5.5
• CVE-2021-47274In the Linux kernel, the following vulnerability has been re…7.8
• CVE-2021-47275In the Linux kernel, the following vulnerability has been re…5.5
• CVE-2021-47277In the Linux kernel, the following vulnerability has been re…7.1
• CVE-2021-47278In the Linux kernel, the following vulnerability has been re…7.8
• CVE-2021-47279In the Linux kernel, the following vulnerability has been re…5.5
• CVE-2021-47280In the Linux kernel, the following vulnerability has been re…7
• CVE-2021-47281In the Linux kernel, the following vulnerability has been re…7
• CVE-2021-47282In the Linux kernel, the following vulnerability has been re…7.8