In the Linux kernel, the following vulnerability has been resolved:
usb: dwc3: gadget: Fix NULL pointer dereference in dwc3_gadget_suspend
In current scenario if Plug-out and Plug-In performed continuously
there could be a chance while checking for dwc->gadget_driver in
dwc3_gadget_suspend, a NULL pointer dereference may occur.
Call Stack:
CPU1: CPU2:
gadget_unbind_driver dwc3_suspend_common
dwc3_gadget_stop dwc3_gadget_suspend
dwc3_disconnect_gadget
CPU1 basically clears the variable and CPU2 checks the variable.
Consider CPU1 is running and right before gadget_driver is cleared
and in parallel CPU2 executes dwc3_gadget_suspend where it finds
dwc->gadget_driver which is not NULL and resumes execution and then
CPU1 completes execution. CPU2 executes dwc3_disconnect_gadget where
it checks dwc->gadget_driver is already NULL because of which the
NULL pointer deference occur.
Vendor | Product | Version | CPE |
---|---|---|---|
linux | linux_kernel | * | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
[
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/usb/dwc3/gadget.c"
],
"versions": [
{
"version": "9772b47a4c29",
"lessThan": "88936ceab6b4",
"status": "affected",
"versionType": "git"
},
{
"version": "9772b47a4c29",
"lessThan": "57e2e42ccd3c",
"status": "affected",
"versionType": "git"
},
{
"version": "9772b47a4c29",
"lessThan": "c7ebd8149ee5",
"status": "affected",
"versionType": "git"
},
{
"version": "9772b47a4c29",
"lessThan": "36695d5eeeef",
"status": "affected",
"versionType": "git"
},
{
"version": "9772b47a4c29",
"lessThan": "61a348857e86",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/usb/dwc3/gadget.c"
],
"versions": [
{
"version": "4.6",
"status": "affected"
},
{
"version": "0",
"lessThan": "4.6",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.15.149",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.1.79",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.6.18",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.7.6",
"lessThanOrEqual": "6.7.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.8",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
]
git.kernel.org/stable/c/36695d5eeeefe5a64b47d0336e7c8fc144e78182
git.kernel.org/stable/c/57e2e42ccd3cd6183228269715ed032f44536751
git.kernel.org/stable/c/61a348857e869432e6a920ad8ea9132e8d44c316
git.kernel.org/stable/c/88936ceab6b426f1312327e9ef849c215c6007a7
git.kernel.org/stable/c/c7ebd8149ee519d27232e6e4940e9c02071b568b