Use After Free Affecting kernel-core package, versions <0:5.14.0-284.77.1.el9_2
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Test your applications- Snyk ID SNYK-RHEL9-KERNELCORE-7652401
- published 8 Aug 2024
- disclosed 28 Apr 2024
Introduced: 28 Apr 2024
CVE-2022-48637 Open this link in a new tabHow to fix?
Upgrade RHEL:9 kernel-core to version 0:5.14.0-284.77.1.el9_2 or higher.
This issue was patched in RHSA-2024:5066.
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:
bnxt: prevent skb UAF after handing over to PTP worker
When reading the timestamp is required bnxt_tx_int() hands over the ownership of the completed skb to the PTP worker. The skb should not be used afterwards, as the worker may run before the rest of our code and free the skb, leading to a use-after-free.
Since dev_kfree_skb_any() accepts NULL make the loss of ownership more obvious and set skb to NULL.