CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
In the Linux kernel, the following vulnerability has been resolved:
platform/x86: intel-vbtn: Protect ACPI notify handler against recursion
Since commit e2ffcda16290 (“ACPI: OSL: Allow Notify () handlers to run on
all CPUs”) ACPI notify handlers like the intel-vbtn notify_handler() may
run on multiple CPU cores racing with themselves.
This race gets hit on Dell Venue 7140 tablets when undocking from
the keyboard, causing the handler to try and register priv->switches_dev
twice, as can be seen from the dev_info() message getting logged twice:
[ 83.861800] intel-vbtn INT33D6:00: Registering Intel Virtual Switches
input-dev after receiving a switch event
[ 83.861858] input: Intel Virtual Switches as
/devices/pci0000:00/0000:00:1f.0/PNP0C09:00/INT33D6:00/input/input17
[ 83.861865] intel-vbtn INT33D6:00: Registering Intel Virtual Switches
input-dev after receiving a switch event
After which things go seriously wrong:
[ 83.861872] sysfs: cannot create duplicate filename
‘/devices/pci0000:00/0000:00:1f.0/PNP0C09:00/INT33D6:00/input/input17’
…
[ 83.861967] kobject: kobject_add_internal failed for input17 with -EEXIST,
don’t try to register things with the same name in the same directory.
[ 83.877338] BUG: kernel NULL pointer dereference, address:
0000000000000018
…
Protect intel-vbtn notify_handler() from racing with itself with a mutex
to fix this.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 24.04 | noarch | linux | < any | UNKNOWN |
ubuntu | 24.04 | noarch | linux-aws | < any | UNKNOWN |
ubuntu | 24.04 | noarch | linux-azure | < any | UNKNOWN |
ubuntu | 24.04 | noarch | linux-gcp | < any | UNKNOWN |
ubuntu | 24.04 | noarch | linux-gke | < any | UNKNOWN |
ubuntu | 22.04 | noarch | linux-hwe-6.8 | < any | UNKNOWN |
ubuntu | 24.04 | noarch | linux-ibm | < any | UNKNOWN |
ubuntu | 24.04 | noarch | linux-intel | < any | UNKNOWN |
ubuntu | 24.04 | noarch | linux-lowlatency | < any | UNKNOWN |
ubuntu | 22.04 | noarch | linux-lowlatency-hwe-6.8 | < any | UNKNOWN |
git.kernel.org/linus/e075c3b13a0a142dcd3151b25d29a24f31b7b640 (6.11-rc3)
git.kernel.org/stable/c/5c9618a3b6ea94cf7bdff7702aca8bf2d777d97b
git.kernel.org/stable/c/e075c3b13a0a142dcd3151b25d29a24f31b7b640
launchpad.net/bugs/cve/CVE-2024-44937
nvd.nist.gov/vuln/detail/CVE-2024-44937
security-tracker.debian.org/tracker/CVE-2024-44937
www.cve.org/CVERecord?id=CVE-2024-44937