Integer Underflow Affecting kernel-core package, versions <0:5.14.0-284.67.1.el9_2
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Test your applications- Snyk ID SNYK-RHEL9-KERNELCORE-7156375
- published 29 May 2024
- disclosed 17 Apr 2024
Introduced: 17 Apr 2024
CVE-2024-26828 Open this link in a new tabHow to fix?
Upgrade RHEL:9 kernel-core to version 0:5.14.0-284.67.1.el9_2 or higher.
This issue was patched in RHSA-2024:3461.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-core package and not the kernel-core package as distributed by RHEL.
See How to fix? for RHEL:9 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
cifs: fix underflow in parse_server_interfaces()
In this loop, we step through the buffer and after each item we check if the size_left is greater than the minimum size we need. However, the problem is that "bytes_left" is type ssize_t while sizeof() is type size_t. That means that because of type promotion, the comparison is done as an unsigned and if we have negative bytes left the loop continues instead of ending.
References
- https://access.redhat.com/security/cve/CVE-2024-26828
- https://git.kernel.org/stable/c/7190353835b4a219abb70f90b06cdcae97f11512
- https://git.kernel.org/stable/c/cffe487026be13eaf37ea28b783d9638ab147204
- https://git.kernel.org/stable/c/df2af9fdbc4ddde18a3371c4ca1a86596e8be301
- https://git.kernel.org/stable/c/f7ff1c89fb6e9610d2b01c1821727729e6609308