Memory Leak Affecting perf package, versions <0:4.18.0-553.27.1.el8_10
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Test your applications- Snyk ID SNYK-RHEL8-PERF-7760977
- published 21 Aug 2024
- disclosed 17 Aug 2024
Introduced: 17 Aug 2024
CVE-2024-43854 Open this link in a new tabHow to fix?
Upgrade RHEL:8 perf to version 0:4.18.0-553.27.1.el8_10 or higher.
This issue was patched in RHSA-2024:8856.
NVD Description
Note: Versions mentioned in the description apply only to the upstream perf package and not the perf package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
block: initialize integrity buffer to zero before writing it to media
Metadata added by bio_integrity_prep is using plain kmalloc, which leads to random kernel memory being written media. For PI metadata this is limited to the app tag that isn't used by kernel generated metadata, but for non-PI metadata the entire buffer leaks kernel memory.
Fix this by adding the __GFP_ZERO flag to allocations for writes.
References
- https://access.redhat.com/security/cve/CVE-2024-43854
- https://git.kernel.org/stable/c/23a19655fb56f241e592041156dfb1c6d04da644
- https://git.kernel.org/stable/c/899ee2c3829c5ac14bfc7d3c4a5846c0b709b78f
- https://git.kernel.org/stable/c/cf6b45ea7a8df0f61bded1dc4a8561ac6ad143d2
- https://git.kernel.org/stable/c/d418313bd8f55c079a7da12651951b489a638ac1
- https://git.kernel.org/stable/c/ebc0e91ba76dc6544fff9f5b66408b1982806a00
- https://git.kernel.org/stable/c/129f95948a96105c1fad8e612c9097763e88ac5f
- https://git.kernel.org/stable/c/3fd11fe4f20756b4c0847f755a64cd96f8c6a005
- https://git.kernel.org/stable/c/9f4af4cf08f9a0329ade3d938f55d2220c40d0a6