CVE-2023-52847
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2023-52847
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-52847.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2023-52847
- Downstream
- Related
- Published
- 2024-05-21T16:15:21Z
- Modified
- 2025-08-09T20:01:28Z
- Severity
-
- 7.0 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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 bttvirqtimeout and bttvremove. The timer is setup in probe and there is no timerdelete 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 deltimersync invoking to the remove function.
cpu0 cpu1 bttvprobe ->timersetup ->bttvsetdma ->modtimer; bttvremove ->kfree(btv); ->bttvirqtimeout ->USE btv
- References
-
- https://git.kernel.org/stable/c/1871014d6ef4812ad11ef7d838d73ce09d632267
- https://git.kernel.org/stable/c/20568d06f6069cb835e05eed432edf962645d226
- https://git.kernel.org/stable/c/2f3d9198cdae1cb079ec8652f4defacd481eab2b
- https://git.kernel.org/stable/c/51c94256a83fe4e17406c66ff3e1ad7d242d8574
- https://git.kernel.org/stable/c/847599fffa528b2cdec4e21b6bf7586dad982132
- https://git.kernel.org/stable/c/b35fdade92c5058a5e727e233fe263b828de2c9a
- https://git.kernel.org/stable/c/bbc3b8dd2cb7817e703f112d988e4f4728f0f2a9
- https://git.kernel.org/stable/c/bd5b50b329e850d467e7bcc07b2b6bde3752fbda