CWE
476
Advisory Published
Updated

CVE-2024-50132: tracing/probes: Fix MAX_TRACE_ARGS limit handling

First published: Tue Nov 05 2024(Updated: )

In the Linux kernel, the following vulnerability has been resolved: tracing/probes: Fix MAX_TRACE_ARGS limit handling When creating a trace_probe we would set nr_args prior to truncating the arguments to MAX_TRACE_ARGS. However, we would only initialize arguments up to the limit. This caused invalid memory access when attempting to set up probes with more than 128 fetchargs. BUG: kernel NULL pointer dereference, address: 0000000000000020 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: Oops: 0000 [#1] PREEMPT SMP PTI CPU: 0 UID: 0 PID: 1769 Comm: cat Not tainted 6.11.0-rc7+ #8 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-1.fc39 04/01/2014 RIP: 0010:__set_print_fmt+0x134/0x330 Resolve the issue by applying the MAX_TRACE_ARGS limit earlier. Return an error when there are too many arguments instead of silently truncating.

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Affected SoftwareAffected VersionHow to fix
Linux Kernel>=6.9<6.11.6
Linux Kernel=6.12-rc1
Linux Kernel=6.12-rc2
Linux Kernel=6.12-rc3
Linux Kernel=6.12-rc4
debian/linux
5.10.223-1
5.10.226-1
6.1.123-1
6.1.128-1
6.12.12-1
6.12.15-1

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Frequently Asked Questions

  • What is the severity of CVE-2024-50132?

    CVE-2024-50132 is considered a low severity vulnerability in the Linux kernel.

  • How do I fix CVE-2024-50132?

    To fix CVE-2024-50132, update your Linux kernel to a version higher than 6.11.6 or apply the relevant patches provided by the Linux kernel maintainers.

  • Which versions of the Linux kernel are affected by CVE-2024-50132?

    CVE-2024-50132 affects Linux kernel versions from 6.9 up to 6.11.6 and specific release candidates of 6.12.

  • What impact does CVE-2024-50132 have on kernel tracing?

    CVE-2024-50132 addresses an issue in kernel tracing where the argument limit was not properly enforced, potentially leading to unexpected behavior.

  • Is CVE-2024-50132 present in stable releases of the Linux kernel?

    Yes, CVE-2024-50132 has been resolved in specific stable releases and release candidate versions of the Linux kernel.

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