CVE-2024-45020

216.73.216.197

· Published 11/09/2024 16:15 · Modified 13/09/2024 16:36

Labels: CVE-2024-45020 2024-09-11 416baaa9-dc9f-4396-8d5f-8c081fb06d67 CVE-2024-45020 CWE-787

Essential information

Published: 11/09/2024 16:15
Modified: 13/09/2024 16:36
Author: —
Creator: —
CVSS: 5.5 MEDIUM (v3.1)
CISA KEV: No
CWE: —
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS metrics

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix a kernel verifier crash in stacksafe() Daniel Hodges reported a kernel verifier crash when playing with sched-ext. Further investigation shows that the crash is due to invalid memory access in stacksafe(). More specifically, it is the following code: if (exact != NOT_EXACT && old->stack[spi].slot_type[i % BPF_REG_SIZE] != cur->stack[spi].slot_type[i % BPF_REG_SIZE]) return false; The 'i' iterates old->allocated_stack. If cur->allocated_stack < old->allocated_stack the out-of-bound access will happen. To fix the issue add 'i >= cur->allocated_stack' check such that if the condition is true, stacksafe() should fail. Otherwise, cur->stack[spi].slot_type[i % BPF_REG_SIZE] memory access is legal.

NVD status

Status: Analyzed — CVE has been marked for Analysis. Normally once in this state the CVE will be analyzed by NVD staff within 24 hours.
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
NVD: View on NVD

Affected products (CPE)

Product	CPE
linux / linux kernel	`cpe:2.3:o:linux:linux_kernel::::::::`
linux / linux kernel	`cpe:2.3:o:linux:linux_kernel::::::::`
linux / linux kernel	`cpe:2.3:o:linux:linux_kernel:6.11:rc1::::::`
linux / linux kernel	`cpe:2.3:o:linux:linux_kernel:6.11:rc2::::::`
linux / linux kernel	`cpe:2.3:o:linux:linux_kernel:6.11:rc3::::::`