CVE-2024-35977
Google Chrome OS platform/UART: Race Condition NULL Pointer Dereference Vulnerability
Description
In the Linux kernel, the following vulnerability has been resolved: platform/chrome: cros_ec_uart: properly fix race condition The cros_ec_uart_probe() function calls devm_serdev_device_open() before it calls serdev_device_set_client_ops(). This can trigger a NULL pointer dereference: BUG: kernel NULL pointer dereference, address: 0000000000000000 ... Call Trace: <TASK> ... ? ttyport_receive_buf A simplified version of crashing code is as follows: static inline size_t serdev_controller_receive_buf(struct serdev_controller *ctrl, const u8 *data, size_t count) { struct serdev_device *serdev = ctrl->serdev; if (!serdev || !serdev->ops->receive_buf) // CRASH! return 0; return serdev->ops->receive_buf(serdev, data, count); } It assumes that if SERPORT_ACTIVE is set and serdev exists, serdev->ops will also exist. This conflicts with the existing cros_ec_uart_probe() logic, as it first calls devm_serdev_device_open() (which sets SERPORT_ACTIVE), and only later sets serdev->ops via serdev_device_set_client_ops(). Commit 01f95d42b8f4 ("platform/chrome: cros_ec_uart: fix race condition") attempted to fix a similar race condition, but while doing so, made the window of error for this race condition to happen much wider. Attempt to fix the race condition again, making sure we fully setup before calling devm_serdev_device_open().
INFO
Published Date :
May 20, 2024, 10:15 a.m.
Last Modified :
Jan. 14, 2025, 4:36 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.0
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2024-35977.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2024-35977 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-35977 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Jan. 14, 2025
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE NIST CWE-362 Added CWE NIST CWE-476 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.3 up to (excluding) 6.6.28 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.8.7 *cpe:2.3:o:linux:linux_kernel:6.9:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.9:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.9:rc3:*:*:*:*:*:* Changed Reference Type https://git.kernel.org/stable/c/5e700b384ec13f5bcac9855cb28fcc674f1d3593 No Types Assigned https://git.kernel.org/stable/c/5e700b384ec13f5bcac9855cb28fcc674f1d3593 Patch Changed Reference Type https://git.kernel.org/stable/c/5e700b384ec13f5bcac9855cb28fcc674f1d3593 No Types Assigned https://git.kernel.org/stable/c/5e700b384ec13f5bcac9855cb28fcc674f1d3593 Patch Changed Reference Type https://git.kernel.org/stable/c/9e9bb74a93b7daa32313ccaefd0edc529d40daf8 No Types Assigned https://git.kernel.org/stable/c/9e9bb74a93b7daa32313ccaefd0edc529d40daf8 Patch Changed Reference Type https://git.kernel.org/stable/c/9e9bb74a93b7daa32313ccaefd0edc529d40daf8 No Types Assigned https://git.kernel.org/stable/c/9e9bb74a93b7daa32313ccaefd0edc529d40daf8 Patch Changed Reference Type https://git.kernel.org/stable/c/cfd758041d8b79aa8c3f811b6bd6105379f2f702 No Types Assigned https://git.kernel.org/stable/c/cfd758041d8b79aa8c3f811b6bd6105379f2f702 Patch Changed Reference Type https://git.kernel.org/stable/c/cfd758041d8b79aa8c3f811b6bd6105379f2f702 No Types Assigned https://git.kernel.org/stable/c/cfd758041d8b79aa8c3f811b6bd6105379f2f702 Patch -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/5e700b384ec13f5bcac9855cb28fcc674f1d3593 Added Reference https://git.kernel.org/stable/c/9e9bb74a93b7daa32313ccaefd0edc529d40daf8 Added Reference https://git.kernel.org/stable/c/cfd758041d8b79aa8c3f811b6bd6105379f2f702 -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 29, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 20, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: platform/chrome: cros_ec_uart: properly fix race condition The cros_ec_uart_probe() function calls devm_serdev_device_open() before it calls serdev_device_set_client_ops(). This can trigger a NULL pointer dereference: BUG: kernel NULL pointer dereference, address: 0000000000000000 ... Call Trace: <TASK> ... ? ttyport_receive_buf A simplified version of crashing code is as follows: static inline size_t serdev_controller_receive_buf(struct serdev_controller *ctrl, const u8 *data, size_t count) { struct serdev_device *serdev = ctrl->serdev; if (!serdev || !serdev->ops->receive_buf) // CRASH! return 0; return serdev->ops->receive_buf(serdev, data, count); } It assumes that if SERPORT_ACTIVE is set and serdev exists, serdev->ops will also exist. This conflicts with the existing cros_ec_uart_probe() logic, as it first calls devm_serdev_device_open() (which sets SERPORT_ACTIVE), and only later sets serdev->ops via serdev_device_set_client_ops(). Commit 01f95d42b8f4 ("platform/chrome: cros_ec_uart: fix race condition") attempted to fix a similar race condition, but while doing so, made the window of error for this race condition to happen much wider. Attempt to fix the race condition again, making sure we fully setup before calling devm_serdev_device_open(). Added Reference kernel.org https://git.kernel.org/stable/c/cfd758041d8b79aa8c3f811b6bd6105379f2f702 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/9e9bb74a93b7daa32313ccaefd0edc529d40daf8 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/5e700b384ec13f5bcac9855cb28fcc674f1d3593 [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-35977 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-35977
weaknesses.