Use After Free Affecting kernel-rt-doc package, versions *
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Test your applications- Snyk ID SNYK-CENTOS7-KERNELRTDOC-7079824
- published 23 May 2024
- disclosed 21 May 2024
Introduced: 21 May 2024
CVE-2023-52847 Open this link in a new tabHow to fix?
There is no fixed version for Centos:7 kernel-rt-doc.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt-doc package and not the kernel-rt-doc package as distributed by Centos.
See How to fix? for Centos:7 relevant fixed versions and status.
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
References
- https://access.redhat.com/security/cve/CVE-2023-52847
- 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