CVE-2023-52847
media: bttv: fix use after free error due to btv->timeout timer
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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
En el kernel de Linux, se resolvió la siguiente vulnerabilidad: medio: bttv: corrección de uso después de error gratuito debido a btv->timeout timer. Puede haber alguna condición de ejecución entre la función del temporizador bttv_irq_timeout y bttv_remove. El temporizador está configurado en la sonda y no hay ninguna operación timer_delete en la función de eliminación. Cuando llega a kfree btv, es posible que la función aún se invoque, lo que provocará un error de use after free. Este error se encuentra mediante análisis estático y puede ser un falso positivo. Solucionelo agregando del_timer_sync invocando a la función de eliminación. cpu0 cpu1 bttv_probe ->timer_setup ->bttv_set_dma ->mod_timer; bttv_remove ->kfree(btv); ->bttv_irq_timeout ->USE btv
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-05-21 CVE Reserved
- 2024-05-21 CVE Published
- 2024-05-22 EPSS Updated
- 2024-08-02 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-416: Use After Free
CAPEC
References (11)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/162e6376ac58440beb6a2d2ee294f5d88ea58dd1 | Vuln. Introduced |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2023-52847 | 2024-08-08 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2282717 | 2024-08-08 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.15 < 4.19.299 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.15 < 4.19.299" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.15 < 5.4.261 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.15 < 5.4.261" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.15 < 5.10.201 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.15 < 5.10.201" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.15 < 5.15.139 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.15 < 5.15.139" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.15 < 6.1.63 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.15 < 6.1.63" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.15 < 6.5.12 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.15 < 6.5.12" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.15 < 6.6.2 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.15 < 6.6.2" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.15 < 6.7 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.15 < 6.7" | en |
Affected
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