NULL Pointer Dereference Affecting dlm-kmp-default package, versions <6.4.0-150600.23.7.3
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Test your applications- Snyk ID SNYK-SLES156-DLMKMPDEFAULT-7719707
- published 20 Aug 2024
- disclosed 25 Jun 2024
Introduced: 25 Jun 2024
CVE-2024-36893 Open this link in a new tabHow to fix?
Upgrade SLES:15.6 dlm-kmp-default to version 6.4.0-150600.23.7.3 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream dlm-kmp-default package and not the dlm-kmp-default package as distributed by SLES.
See How to fix? for SLES:15.6 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
usb: typec: tcpm: Check for port partner validity before consuming it
typec_register_partner() does not guarantee partner registration to always succeed. In the event of failure, port->partner is set to the error value or NULL. Given that port->partner validity is not checked, this results in the following crash:
Unable to handle kernel NULL pointer dereference at virtual address xx pc : run_state_machine+0x1bc8/0x1c08 lr : run_state_machine+0x1b90/0x1c08 .. Call trace: run_state_machine+0x1bc8/0x1c08 tcpm_state_machine_work+0x94/0xe4 kthread_worker_fn+0x118/0x328 kthread+0x1d0/0x23c ret_from_fork+0x10/0x20
To prevent the crash, check for port->partner validity before derefencing it in all the call sites.
References
- https://www.suse.com/security/cve/CVE-2024-36893.html
- https://bugzilla.suse.com/1225748
- https://git.kernel.org/stable/c/789326cafbd1f67f424436b6bc8bdb887a364637
- https://git.kernel.org/stable/c/ae11f04b452b5205536e1c02d31f8045eba249dd
- https://git.kernel.org/stable/c/d56d2ca03cc22123fd7626967d096d8661324e57
- https://git.kernel.org/stable/c/fc2b655cb6dd2b381f1f284989721002e39b6b77