0.0
NA
CVE-2024-49924
Ubuntu Linux framebuffer Use After Free (UAF) Vulnerability
Description

In the Linux kernel, the following vulnerability has been resolved: fbdev: pxafb: Fix possible use after free in pxafb_task() In the pxafb_probe function, it calls the pxafb_init_fbinfo function, after which &fbi->task is associated with pxafb_task. Moreover, within this pxafb_init_fbinfo function, the pxafb_blank function within the &pxafb_ops struct is capable of scheduling work. If we remove the module which will call pxafb_remove to make cleanup, it will call unregister_framebuffer function which can call do_unregister_framebuffer to free fbi->fb through put_fb_info(fb_info), while the work mentioned above will be used. The sequence of operations that may lead to a UAF bug is as follows: CPU0 CPU1 | pxafb_task pxafb_remove | unregister_framebuffer(info) | do_unregister_framebuffer(fb_info) | put_fb_info(fb_info) | // free fbi->fb | set_ctrlr_state(fbi, state) | __pxafb_lcd_power(fbi, 0) | fbi->lcd_power(on, &fbi->fb.var) | //use fbi->fb Fix it by ensuring that the work is canceled before proceeding with the cleanup in pxafb_remove. Note that only root user can remove the driver at runtime.

INFO

Published Date :

Oct. 21, 2024, 6:15 p.m.

Last Modified :

Oct. 21, 2024, 6:15 p.m.

Source :

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

Remotely Exploitable :

No

Impact Score :

Exploitability Score :

Affected Products

The following products are affected by CVE-2024-49924 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.

No affected product recoded yet

: Total Affected Vendor : 0 | Products : 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-2024-49924.

URL Resource
https://git.kernel.org/stable/c/3c0d416eb4bef705f699213cee94bf54b6acdacd
https://git.kernel.org/stable/c/4a6921095eb04a900e0000da83d9475eb958e61e
https://git.kernel.org/stable/c/4cda484e584be34d55ee17436ebf7ad11922b97a
https://git.kernel.org/stable/c/a3a855764dbacbdb1cc51e15dc588f2d21c93e0e
https://git.kernel.org/stable/c/aaadc0cb05c999ccd8898a03298b7e5c31509b08
https://git.kernel.org/stable/c/e6897e299f57b103e999e62010b88e363b3eebae
https://git.kernel.org/stable/c/fdda354f60a576d52dcf90351254714681df4370

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-2024-49924 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2024-49924 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.

  • 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: fbdev: pxafb: Fix possible use after free in pxafb_task() In the pxafb_probe function, it calls the pxafb_init_fbinfo function, after which &fbi->task is associated with pxafb_task. Moreover, within this pxafb_init_fbinfo function, the pxafb_blank function within the &pxafb_ops struct is capable of scheduling work. If we remove the module which will call pxafb_remove to make cleanup, it will call unregister_framebuffer function which can call do_unregister_framebuffer to free fbi->fb through put_fb_info(fb_info), while the work mentioned above will be used. The sequence of operations that may lead to a UAF bug is as follows: CPU0 CPU1 | pxafb_task pxafb_remove | unregister_framebuffer(info) | do_unregister_framebuffer(fb_info) | put_fb_info(fb_info) | // free fbi->fb | set_ctrlr_state(fbi, state) | __pxafb_lcd_power(fbi, 0) | fbi->lcd_power(on, &fbi->fb.var) | //use fbi->fb Fix it by ensuring that the work is canceled before proceeding with the cleanup in pxafb_remove. Note that only root user can remove the driver at runtime.
    Added Reference kernel.org https://git.kernel.org/stable/c/e6897e299f57b103e999e62010b88e363b3eebae [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/4cda484e584be34d55ee17436ebf7ad11922b97a [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/3c0d416eb4bef705f699213cee94bf54b6acdacd [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/fdda354f60a576d52dcf90351254714681df4370 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/aaadc0cb05c999ccd8898a03298b7e5c31509b08 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/a3a855764dbacbdb1cc51e15dc588f2d21c93e0e [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/4a6921095eb04a900e0000da83d9475eb958e61e [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-2024-49924 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-2024-49924 weaknesses.

NONE - Vulnerability Scoring System
: