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Out-of-bounds Read The advisory has been revoked - it doesn't affect any version of package kernel-rt-modules-extra  (opens in a new tab)

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EPSS
0.05% (16th percentile)

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  • Snyk IDSNYK-CENTOS9-KERNELRTMODULESEXTRA-5809211
  • published29 Jul 2023
  • disclosed4 May 2023
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Introduced: 4 May 2023

CVE-2023-34256  (opens in a new tab)
CWE-125  (opens in a new tab)

Amendment

The Centos security team deemed this advisory irrelevant for Centos:9.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-modules-extra package and not the kernel-rt-modules-extra package as distributed by Centos.

An issue was discovered in the Linux kernel before 6.3.3. There is an out-of-bounds read in crc16 in lib/crc16.c when called from fs/ext4/super.c because ext4_group_desc_csum does not properly check an offset. NOTE: this is disputed by third parties because the kernel is not intended to defend against attackers with the stated "When modifying the block device while it is mounted by the filesystem" access.