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Source
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Tags
CVE-2024-46691 details
Last Modified : Sept. 13, 2024, 4:52 p.m.
Description
In the Linux kernel, the following vulnerability has been resolved: usb: typec: ucsi: Move unregister out of atomic section Commit '9329933699b3 ("soc: qcom: pmic_glink: Make client-lock non-sleeping")' moved the pmic_glink client list under a spinlock, as it is accessed by the rpmsg/glink callback, which in turn is invoked from IRQ context. This means that ucsi_unregister() is now called from atomic context, which isn't feasible as it's expecting a sleepable context. An effort is under way to get GLINK to invoke its callbacks in a sleepable context, but until then lets schedule the unregistration. A side effect of this is that ucsi_unregister() can now happen after the remote processor, and thereby the communication link with it, is gone. pmic_glink_send() is amended with a check to avoid the resulting NULL pointer dereference. This does however result in the user being informed about this error by the following entry in the kernel log: ucsi_glink.pmic_glink_ucsi pmic_glink.ucsi.0: failed to send UCSI write request: -5
CVSS Score
| 1 | 2 | 3 | 4 | 5.5 | 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
LOW
Privileges Required
LOW
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Base Score
5.5
Exploitability Score
1.8
Impact Score
3.6
Base Severity
MEDIUM
Vector String : CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
References
| URL | Source |
|---|---|
| https://git.kernel.org/stable/c/095b0001aefddcd9361097c971b7debc84e72714 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
| https://git.kernel.org/stable/c/11bb2ffb679399f99041540cf662409905179e3a | 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 | 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 | / | / | / | / | / | / |