Vulnerability Details : CVE-2019-19807
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.
Vulnerability category: Memory Corruption
Products affected by CVE-2019-19807
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2019-19807
0.14%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 50 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2019-19807
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.2
|
HIGH | AV:L/AC:L/Au:N/C:C/I:C/A:C |
3.9
|
10.0
|
NIST | |
|
7.8
|
HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
1.8
|
5.9
|
NIST |
CWE ids for CVE-2019-19807
-
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2019-19807
-
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.11
Release Notes;Vendor Advisory
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https://usn.ubuntu.com/4227-1/
USN-4227-1: Linux kernel vulnerabilities | Ubuntu security noticesThird Party Advisory
-
https://usn.ubuntu.com/4225-1/
USN-4225-1: Linux kernel vulnerabilities | Ubuntu security noticesThird Party Advisory
-
https://usn.ubuntu.com/4227-2/
USN-4227-2: Linux kernel (Azure) vulnerabilities | Ubuntu security noticesThird Party Advisory
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https://github.com/torvalds/linux/commit/e7af6307a8a54f0b873960b32b6a644f2d0fbd97
ALSA: timer: Fix incorrectly assigned timer instance · torvalds/linux@e7af630 · GitHubPatch;Third Party Advisory
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https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e7af6307a8a54f0b873960b32b6a644f2d0fbd97
kernel/git/torvalds/linux.git - Linux kernel source treeExploit;Patch;Vendor Advisory
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https://security.netapp.com/advisory/ntap-20200103-0001/
December 2019 Linux Kernel Vulnerabilities in NetApp Products | NetApp Product SecurityThird Party Advisory
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