5.5
MEDIUM
CVE-2022-49021
Quanta Systems QEMU Null Pointer Dereference Vulnerability
Description

In the Linux kernel, the following vulnerability has been resolved: net: phy: fix null-ptr-deref while probe() failed I got a null-ptr-deref report as following when doing fault injection test: BUG: kernel NULL pointer dereference, address: 0000000000000058 Oops: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 1 PID: 253 Comm: 507-spi-dm9051 Tainted: G B N 6.1.0-rc3+ Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 RIP: 0010:klist_put+0x2d/0xd0 Call Trace: <TASK> klist_remove+0xf1/0x1c0 device_release_driver_internal+0x23e/0x2d0 bus_remove_device+0x1bd/0x240 device_del+0x357/0x770 phy_device_remove+0x11/0x30 mdiobus_unregister+0xa5/0x140 release_nodes+0x6a/0xa0 devres_release_all+0xf8/0x150 device_unbind_cleanup+0x19/0xd0 //probe path: phy_device_register() device_add() phy_connect phy_attach_direct() //set device driver probe() //it's failed, driver is not bound device_bind_driver() // probe failed, it's not called //remove path: phy_device_remove() device_del() device_release_driver_internal() __device_release_driver() //dev->drv is not NULL klist_remove() <- knode_driver is not added yet, cause null-ptr-deref In phy_attach_direct(), after setting the 'dev->driver', probe() fails, device_bind_driver() is not called, so the knode_driver->n_klist is not set, then it causes null-ptr-deref in __device_release_driver() while deleting device. Fix this by setting dev->driver to NULL in the error path in phy_attach_direct().

INFO

Published Date :

Oct. 21, 2024, 8:15 p.m.

Last Modified :

Oct. 24, 2024, 6:44 p.m.

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Remotely Exploitable :

No

Impact Score :

3.6

Exploitability Score :

1.8
Affected Products

The following products are affected by CVE-2022-49021 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
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-2022-49021.

URL Resource
https://git.kernel.org/stable/c/0744c7be4de564db03e24527b2e096b7e0e20972 Patch
https://git.kernel.org/stable/c/369eb2c9f1f72adbe91e0ea8efb130f0a2ba11a6 Patch
https://git.kernel.org/stable/c/3e21f85d87c836462bb52ef2078ea561260935c1 Patch
https://git.kernel.org/stable/c/51d7f6b20fae8bae64ad1136f1e30d1fd5ba78f7 Patch
https://git.kernel.org/stable/c/7730904f50c7187dd16c76949efb56b5fb55cd57 Patch
https://git.kernel.org/stable/c/8aaafe0f71314f46a066382a047ba8bb3840d273 Patch
https://git.kernel.org/stable/c/eaa5722549ac2604ffa56c2e946acc83226f130c Patch
https://git.kernel.org/stable/c/fe6bc99c27c21348f548966118867ed26a9a372c Patch

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).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2022-49021 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2022-49021 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.

  • Initial Analysis by [email protected]

    Oct. 24, 2024

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type https://git.kernel.org/stable/c/0744c7be4de564db03e24527b2e096b7e0e20972 No Types Assigned https://git.kernel.org/stable/c/0744c7be4de564db03e24527b2e096b7e0e20972 Patch
    Changed Reference Type https://git.kernel.org/stable/c/369eb2c9f1f72adbe91e0ea8efb130f0a2ba11a6 No Types Assigned https://git.kernel.org/stable/c/369eb2c9f1f72adbe91e0ea8efb130f0a2ba11a6 Patch
    Changed Reference Type https://git.kernel.org/stable/c/3e21f85d87c836462bb52ef2078ea561260935c1 No Types Assigned https://git.kernel.org/stable/c/3e21f85d87c836462bb52ef2078ea561260935c1 Patch
    Changed Reference Type https://git.kernel.org/stable/c/51d7f6b20fae8bae64ad1136f1e30d1fd5ba78f7 No Types Assigned https://git.kernel.org/stable/c/51d7f6b20fae8bae64ad1136f1e30d1fd5ba78f7 Patch
    Changed Reference Type https://git.kernel.org/stable/c/7730904f50c7187dd16c76949efb56b5fb55cd57 No Types Assigned https://git.kernel.org/stable/c/7730904f50c7187dd16c76949efb56b5fb55cd57 Patch
    Changed Reference Type https://git.kernel.org/stable/c/8aaafe0f71314f46a066382a047ba8bb3840d273 No Types Assigned https://git.kernel.org/stable/c/8aaafe0f71314f46a066382a047ba8bb3840d273 Patch
    Changed Reference Type https://git.kernel.org/stable/c/eaa5722549ac2604ffa56c2e946acc83226f130c No Types Assigned https://git.kernel.org/stable/c/eaa5722549ac2604ffa56c2e946acc83226f130c Patch
    Changed Reference Type https://git.kernel.org/stable/c/fe6bc99c27c21348f548966118867ed26a9a372c No Types Assigned https://git.kernel.org/stable/c/fe6bc99c27c21348f548966118867ed26a9a372c Patch
    Added CWE NIST CWE-476
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 2.6.14 up to (excluding) 4.9.335 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.10 up to (excluding) 4.14.301 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.15 up to (excluding) 4.19.268 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.226 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.158 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.82 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.0.12 *cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.1:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.1:rc6:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.1:rc7:*:*:*:*:*:*
  • CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Oct. 21, 2024

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: net: phy: fix null-ptr-deref while probe() failed I got a null-ptr-deref report as following when doing fault injection test: BUG: kernel NULL pointer dereference, address: 0000000000000058 Oops: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 1 PID: 253 Comm: 507-spi-dm9051 Tainted: G B N 6.1.0-rc3+ Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 RIP: 0010:klist_put+0x2d/0xd0 Call Trace: <TASK> klist_remove+0xf1/0x1c0 device_release_driver_internal+0x23e/0x2d0 bus_remove_device+0x1bd/0x240 device_del+0x357/0x770 phy_device_remove+0x11/0x30 mdiobus_unregister+0xa5/0x140 release_nodes+0x6a/0xa0 devres_release_all+0xf8/0x150 device_unbind_cleanup+0x19/0xd0 //probe path: phy_device_register() device_add() phy_connect phy_attach_direct() //set device driver probe() //it's failed, driver is not bound device_bind_driver() // probe failed, it's not called //remove path: phy_device_remove() device_del() device_release_driver_internal() __device_release_driver() //dev->drv is not NULL klist_remove() <- knode_driver is not added yet, cause null-ptr-deref In phy_attach_direct(), after setting the 'dev->driver', probe() fails, device_bind_driver() is not called, so the knode_driver->n_klist is not set, then it causes null-ptr-deref in __device_release_driver() while deleting device. Fix this by setting dev->driver to NULL in the error path in phy_attach_direct().
    Added Reference kernel.org https://git.kernel.org/stable/c/8aaafe0f71314f46a066382a047ba8bb3840d273 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/51d7f6b20fae8bae64ad1136f1e30d1fd5ba78f7 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/0744c7be4de564db03e24527b2e096b7e0e20972 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/3e21f85d87c836462bb52ef2078ea561260935c1 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/fe6bc99c27c21348f548966118867ed26a9a372c [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/7730904f50c7187dd16c76949efb56b5fb55cd57 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/eaa5722549ac2604ffa56c2e946acc83226f130c [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/369eb2c9f1f72adbe91e0ea8efb130f0a2ba11a6 [No types assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2022-49021 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-2022-49021 weaknesses.

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
: