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Linux kernel
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Source
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Tags
CVE-2024-46693 details
Last Modified : Sept. 13, 2024, 4:52 p.m.
Description
In the Linux kernel, the following vulnerability has been resolved: soc: qcom: pmic_glink: Fix race during initialization As pointed out by Stephen Boyd it is possible that during initialization of the pmic_glink child drivers, the protection-domain notifiers fires, and the associated work is scheduled, before the client registration returns and as a result the local "client" pointer has been initialized. The outcome of this is a NULL pointer dereference as the "client" pointer is blindly dereferenced. Timeline provided by Stephen: CPU0 CPU1 ---- ---- ucsi->client = NULL; devm_pmic_glink_register_client() client->pdr_notify(client->priv, pg->client_state) pmic_glink_ucsi_pdr_notify() schedule_work(&ucsi->register_work) <schedule away> pmic_glink_ucsi_register() ucsi_register() pmic_glink_ucsi_read_version() pmic_glink_ucsi_read() pmic_glink_ucsi_read() pmic_glink_send(ucsi->client) <client is NULL BAD> ucsi->client = client // Too late! This code is identical across the altmode, battery manager and usci child drivers. Resolve this by splitting the allocation of the "client" object and the registration thereof into two operations. This only happens if the protection domain registry is populated at the time of registration, which by the introduction of commit '1ebcde047c54 ("soc: qcom: add pd-mapper implementation")' became much more likely.
CVSS Score
| 1 | 2 | 3 | 4.7 | 5 | 6 | 7 | 8 | 9 | 10 |
|---|
Weakness
| Weakness | Name | Description |
|---|---|---|
| CWE-476 | NULL Pointer Dereference | A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. |
CVSS Data
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Base Score
4.7
Exploitability Score
1.0
Impact Score
3.6
Base Severity
MEDIUM
Vector String : CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
References
| URL | Source |
|---|---|
| https://git.kernel.org/stable/c/1efdbf5323c9360e05066049b97414405e94e087 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
| https://git.kernel.org/stable/c/3568affcddd68743e25aa3ec1647d9b82797757b | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
| https://git.kernel.org/stable/c/943b0e7cc646a624bb20a68080f8f1a4a55df41c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
CPEs
| Type | Vendor | Product | Version | Update | Edition | Language | Software Edition | Target Software | Target Hardware | Other Information |
|---|---|---|---|---|---|---|---|---|---|---|
| o | linux | linux_kernel | / | / | / | / | / | / | / | / |
| o | linux | linux_kernel | / | / | / | / | / | / | / | / |
| o | linux | linux_kernel | 6.11 | rc1 | / | / | / | / | / | / |
| o | linux | linux_kernel | 6.11 | rc2 | / | / | / | / | / | / |
| o | linux | linux_kernel | 6.11 | rc3 | / | / | / | / | / | / |
| o | linux | linux_kernel | 6.11 | rc4 | / | / | / | / | / | / |
| o | linux | linux_kernel | 6.11 | rc5 | / | / | / | / | / | / |