CVE-2024-53138: net/mlx5e: kTLS, Fix incorrect page refcounting
In the Linux kernel, the following vulnerability has been resolved:
net/mlx5e: kTLS, Fix incorrect page refcounting
The kTLS tx handling code is using a mix of getpage() and pagerefinc() APIs to increment the page reference. But on the release path (mlx5ektlstxhandleresyncdumpcomp()), only putpage() is used.
This is an issue when using pages from large folios: the getpage() references are stored on the folio page while the pagerefinc() references are stored directly in the given page. On release the folio page will be dereferenced too many times.
This was found while doing kTLS testing with sendfile() + ZC when the served file was read from NFS on a kernel with NFS large folios support (commit 49b29a573da8 ("nfs: add support for large folios")).
Other sources
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— Launchpad
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 5.10.234-1Fixed in 6.1.129-1Fixed in 6.1.135-1Fixed in 6.12.25-1 - Upgrade
Upgrade
debian/linux-6.1to a version that resolves this vulnerability.Fixed in 6.1.129-1~deb11u1
Event History
Frequently Asked Questions
What is the severity of CVE-2024-53138?
CVE-2024-53138 has been classified as a moderate severity vulnerability affecting the Linux kernel.
How do I fix CVE-2024-53138?
To mitigate CVE-2024-53138, you should update your Linux kernel to a version that addresses this vulnerability.
What versions are affected by CVE-2024-53138?
CVE-2024-53138 affects multiple versions of the Linux kernel, specifically between versions 5.4 up to 6.6.63 and several release candidates up to 6.12-rc7.
What components are impacted by CVE-2024-53138?
CVE-2024-53138 impacts the kTLS (Kernel TLS) transmission code in the networking subsystem of the Linux kernel.
What are the consequences of not addressing CVE-2024-53138?
Failing to address CVE-2024-53138 could lead to potential memory handling issues, which may be exploited to cause system instability.