FICHE CVE

CVE-2021-47276

Publiée le 2024-05-21 · Dernière modification le 2026-06-17

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.

CVSS 3.15.5 MOYENNE

Type de faiblesse

CWE-706

Publiée2024-05-21

Dernière modification2026-06-17

DÉTAIL DU VECTEUR CVSS

Vecteur d'attaqueLocal

Complexité d'attaqueFaible

Privilèges requisFaibles

Interaction utilisateurAucune

PortéeInchangée

Impact sur la confidentialitéAucun

Impact sur l'intégritéAucun

Impact sur la disponibilitéÉlevé

CVE-2021-47276

DÉTAIL DU VECTEUR CVSS

RÉFÉRENCES