NULL Pointer Dereference Affecting kernel-rt-debug-devel package, versions *
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Start learning- Snyk IDSNYK-RHEL8-KERNELRTDEBUGDEVEL-7910694
- published5 Sept 2024
- disclosed4 Sept 2024
Introduced: 4 Sep 2024
CVE-2024-45006 (opens in a new tab)How to fix?
There is no fixed version for RHEL:8 kernel-rt-debug-devel.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug-devel package and not the kernel-rt-debug-devel 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:
xhci: Fix Panther point NULL pointer deref at full-speed re-enumeration
re-enumerating full-speed devices after a failed address device command can trigger a NULL pointer dereference.
Full-speed devices may need to reconfigure the endpoint 0 Max Packet Size value during enumeration. Usb core calls usb_ep0_reinit() in this case, which ends up calling xhci_configure_endpoint().
On Panther point xHC the xhci_configure_endpoint() function will additionally check and reserve bandwidth in software. Other hosts do this in hardware
If xHC address device command fails then a new xhci_virt_device structure is allocated as part of re-enabling the slot, but the bandwidth table pointers are not set up properly here. This triggers the NULL pointer dereference the next time usb_ep0_reinit() is called and xhci_configure_endpoint() tries to check and reserve bandwidth
[46710.713538] usb 3-1: new full-speed USB device number 5 using xhci_hcd [46710.713699] usb 3-1: Device not responding to setup address. [46710.917684] usb 3-1: Device not responding to setup address. [46711.125536] usb 3-1: device not accepting address 5, error -71 [46711.125594] BUG: kernel NULL pointer dereference, address: 0000000000000008 [46711.125600] #PF: supervisor read access in kernel mode [46711.125603] #PF: error_code(0x0000) - not-present page [46711.125606] PGD 0 P4D 0 [46711.125610] Oops: Oops: 0000 [#1] PREEMPT SMP PTI [46711.125615] CPU: 1 PID: 25760 Comm: kworker/1:2 Not tainted 6.10.3_2 #1 [46711.125620] Hardware name: Gigabyte Technology Co., Ltd. [46711.125623] Workqueue: usb_hub_wq hub_event [usbcore] [46711.125668] RIP: 0010:xhci_reserve_bandwidth (drivers/usb/host/xhci.c
Fix this by making sure bandwidth table pointers are set up correctly after a failed address device command, and additionally by avoiding checking for bandwidth in cases like this where no actual endpoints are added or removed, i.e. only context for default control endpoint 0 is evaluated.
References
- https://access.redhat.com/security/cve/CVE-2024-45006
- https://git.kernel.org/stable/c/0f0654318e25b2c185e245ba4a591e42fabb5e59
- https://git.kernel.org/stable/c/365ef7c4277fdd781a695c3553fa157d622d805d
- https://git.kernel.org/stable/c/5ad898ae82412f8a689d59829804bff2999dd0ea
- https://git.kernel.org/stable/c/6b99de301d78e1f5249e57ef2c32e1dec3df2bb1
- https://git.kernel.org/stable/c/8fb9d412ebe2f245f13481e4624b40e651570cbd
- https://git.kernel.org/stable/c/a57b0ebabe6862dce0a2e0f13e17941ad72fc56b
- https://git.kernel.org/stable/c/af8e119f52e9c13e556be9e03f27957554a84656
- https://git.kernel.org/stable/c/ef0a0e616b2789bb804a0ce5e161db03170a85b6