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Ubuntu: (CVE-2021-47006): linux vulnerability

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Ubuntu: (CVE-2021-47006): linux vulnerability

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
02/28/2024
Created
11/21/2024
Added
11/19/2024
Modified
02/11/2025

Description

In the Linux kernel, the following vulnerability has been resolved: ARM: 9064/1: hw_breakpoint: Do not directly check the event's overflow_handler hook The commit 1879445dfa7b ("perf/core: Set event's default ::overflow_handler()") set a default event->overflow_handler in perf_event_alloc(), and replace the check event->overflow_handler with is_default_overflow_handler(), but one is missing. Currently, the bp->overflow_handler can not be NULL. As a result, enable_single_step() is always not invoked. Comments from Zhen Lei: https://patchwork.kernel.org/project/linux-arm-kernel/patch/[email protected]/

Solution(s)

  • ubuntu-upgrade-linux
  • ubuntu-upgrade-linux-aws
  • ubuntu-upgrade-linux-aws-5-4
  • ubuntu-upgrade-linux-aws-fips
  • ubuntu-upgrade-linux-aws-hwe
  • ubuntu-upgrade-linux-azure
  • ubuntu-upgrade-linux-azure-4-15
  • ubuntu-upgrade-linux-azure-5-4
  • ubuntu-upgrade-linux-azure-fips
  • ubuntu-upgrade-linux-bluefield
  • ubuntu-upgrade-linux-fips
  • ubuntu-upgrade-linux-gcp
  • ubuntu-upgrade-linux-gcp-4-15
  • ubuntu-upgrade-linux-gcp-5-4
  • ubuntu-upgrade-linux-gcp-fips
  • ubuntu-upgrade-linux-gkeop
  • ubuntu-upgrade-linux-hwe
  • ubuntu-upgrade-linux-hwe-5-4
  • ubuntu-upgrade-linux-kvm
  • ubuntu-upgrade-linux-oracle
  • ubuntu-upgrade-linux-oracle-5-4
  • ubuntu-upgrade-linux-raspi
  • ubuntu-upgrade-linux-raspi-5-4

References

  • https://attackerkb.com/topics/cve-2021-47006
  • CVE - 2021-47006
  • https://git.kernel.org/linus/a506bd5756290821a4314f502b4bafc2afcf5260
  • https://git.kernel.org/stable/c/3ed8832aeaa9a37b0fc386bb72ff604352567c80
  • https://git.kernel.org/stable/c/555a70f7fff03bd669123487905c47ae27dbdaac
  • https://git.kernel.org/stable/c/630146203108bf6b8934eec0dfdb3e46dcb917de
  • https://git.kernel.org/stable/c/7eeacc6728c5478e3c01bc82a1f08958eaa12366
  • https://git.kernel.org/stable/c/a506bd5756290821a4314f502b4bafc2afcf5260
  • https://git.kernel.org/stable/c/a9938d6d78a238d6ab8de57a4d3dcf77adceb9bb
  • https://git.kernel.org/stable/c/dabe299425b1a53a69461fed7ac8922ea6733a25
  • https://git.kernel.org/stable/c/ed1f67465327cec4457bb988775245b199da86e6
  • https://www.cve.org/CVERecord?id=CVE-2021-47006
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