CVE-2023-52847

Name: CVE-2023-52847
Creator: NVD / NIST
Published: 2024-05-21T16:15:21.873+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7/10EPSS 0.18%

Last modified Jun 17, 2026

CVE-2023-52847 is a high-severity vulnerability rated 7/10 on the CVSS scale. In the Linux kernel, the following vulnerability has been resolved: media: bttv: fix use after free error due to btv->timeout timer There may be some a race condition between timer function bttv_irq_timeout and bttv_remove. The timer is setup in probe and there is no timer_delete operation in remove function. EPSS estimates a 0.18% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: media: bttv: fix use after free error due to btv->timeout timer There may be some a race condition between timer function bttv_irq_timeout and bttv_remove. The timer is setup in probe and there is no timer_delete operation in remove function. When it hit kfree btv, the function might still be invoked, which will cause use after free bug. This bug is found by static analysis, it may be false positive. Fix it by adding del_timer_sync invoking to the remove function. cpu0 cpu1 bttv_probe ->timer_setup ->bttv_set_dma ->mod_timer; bttv_remove ->kfree(btv); ->bttv_irq_timeout ->USE btv

Metrics

CVSS 3.1

7/10

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.18%

8.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	>= 4.15, < 4.19.299
Linux	Linux Kernel	>= 4.20, < 5.4.261
Linux	Linux Kernel	>= 5.5, < 5.10.201
Linux	Linux Kernel	>= 5.11, < 5.15.139
Linux	Linux Kernel	>= 5.16, < 6.1.63
Linux	Linux Kernel	>= 6.2, < 6.5.12
Linux	Linux Kernel	>= 6.6, < 6.6.2

References

https://git.kernel.org/stable/c/1871014d6ef4812ad11ef7d838d73ce09d632267Mailing List, Patch
https://git.kernel.org/stable/c/20568d06f6069cb835e05eed432edf962645d226Mailing List, Patch
https://git.kernel.org/stable/c/2f3d9198cdae1cb079ec8652f4defacd481eab2bMailing List, Patch
https://git.kernel.org/stable/c/51c94256a83fe4e17406c66ff3e1ad7d242d8574Mailing List, Patch
https://git.kernel.org/stable/c/847599fffa528b2cdec4e21b6bf7586dad982132Mailing List, Patch
https://git.kernel.org/stable/c/b35fdade92c5058a5e727e233fe263b828de2c9aMailing List, Patch
https://git.kernel.org/stable/c/bbc3b8dd2cb7817e703f112d988e4f4728f0f2a9Mailing List, Patch
https://git.kernel.org/stable/c/bd5b50b329e850d467e7bcc07b2b6bde3752fbdaMailing List, Patch
https://git.kernel.org/stable/c/1871014d6ef4812ad11ef7d838d73ce09d632267Mailing List, Patch
https://git.kernel.org/stable/c/20568d06f6069cb835e05eed432edf962645d226Mailing List, Patch
https://git.kernel.org/stable/c/2f3d9198cdae1cb079ec8652f4defacd481eab2bMailing List, Patch
https://git.kernel.org/stable/c/51c94256a83fe4e17406c66ff3e1ad7d242d8574Mailing List, Patch
https://git.kernel.org/stable/c/847599fffa528b2cdec4e21b6bf7586dad982132Mailing List, Patch
https://git.kernel.org/stable/c/b35fdade92c5058a5e727e233fe263b828de2c9aMailing List, Patch
https://git.kernel.org/stable/c/bbc3b8dd2cb7817e703f112d988e4f4728f0f2a9Mailing List, Patch
https://git.kernel.org/stable/c/bd5b50b329e850d467e7bcc07b2b6bde3752fbdaMailing List, Patch

Timeline

Published: May 21, 2024
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2023-52847?

How severe is CVE-2023-52847?

CVE-2023-52847 has a CVSS score of 7/10 (HIGH severity). The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.

How do I fix CVE-2023-52847?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-52847?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST