CVE-2019-19807
kernel: use-after-free in sound/core/timer.c
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
1Exploited in Wild
-Decision
Descriptions
In the Linux kernel before 5.3.11, sound/core/timer.c has a use-after-free caused by erroneous code refactoring, aka CID-e7af6307a8a5. This is related to snd_timer_open and snd_timer_close_locked. The timeri variable was originally intended to be for a newly created timer instance, but was used for a different purpose after refactoring.
En el kernel de Linux versiones anteriores a la versión 5.3.11, el archivo sound/core/timer.c tiene un uso de la memoria previamente liberada causado por una refactorización de código errónea, también se conoce como CID-e7af6307a8a5. Esto está relacionado con las funciones snd_timer_open y snd_timer_close_locked. La variable timeri originalmente estaba destinada a una instancia de temporizador recién creada, pero fue usado para un propósito diferente después de la refactorización.
A memory flaw was found in the ALSA subsystem of the Linux kernel. The struct snd_timer_instance function fails the timer->max_instances check leading to an invalid address. This could lead to a use-after-free vulnerability.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2019-12-15 CVE Reserved
- 2019-12-15 CVE Published
- 2023-03-08 EPSS Updated
- 2024-08-05 CVE Updated
- 2024-08-05 First Exploit
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-416: Use After Free
CAPEC
References (9)
| URL | Tag | Source |
|---|---|---|
| https://security.netapp.com/advisory/ntap-20200103-0001 | Third Party Advisory |
|
| URL | Date | SRC |
|---|---|---|
| https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e7af6307a8a54f0b873960b32b6a644f2d0fbd97 | 2024-08-05 |
| URL | Date | SRC |
|---|---|---|
| https://github.com/torvalds/linux/commit/e7af6307a8a54f0b873960b32b6a644f2d0fbd97 | 2023-01-17 |
| URL | Date | SRC |
|---|---|---|
| https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.11 | 2023-01-17 | |
| https://usn.ubuntu.com/4225-1 | 2023-01-17 | |
| https://usn.ubuntu.com/4227-1 | 2023-01-17 | |
| https://usn.ubuntu.com/4227-2 | 2023-01-17 | |
| https://access.redhat.com/security/cve/CVE-2019-19807 | 2020-09-29 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1786078 | 2020-09-29 |
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" | >= 4.9.199 < 4.9.201 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.9.199 < 4.9.201" | - |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.14.152 < 4.14.154 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.14.152 < 4.14.154" | - |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.19.82 < 4.19.84 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.19.82 < 4.19.84" | - |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.2 < 5.3.11 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.2 < 5.3.11" | - |
Affected
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| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 14.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "14.04" | esm |
Affected
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| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 16.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04" | lts |
Affected
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| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 18.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.04" | lts |
Affected
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| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 19.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "19.10" | - |
Affected
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