Vulnerability Details : CVE-2019-8912
In the Linux kernel through 4.20.11, af_alg_release() in crypto/af_alg.c neglects to set a NULL value for a certain structure member, which leads to a use-after-free in sockfs_setattr.
Vulnerability category: Memory Corruption
Products affected by CVE-2019-8912
- cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
- 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:5.0:rc7:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.0:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.0:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.0:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.0:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.0:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.0:rc6:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.0:rc8:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
- cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2019-8912
0.13%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 29 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2019-8912
| 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-2019-8912
-
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.Assigned by: nvd@nist.gov (Primary)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-2019-8912
-
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-8912
1678685 – (CVE-2019-8912) CVE-2019-8912 kernel: af_alg_release() in crypto/af_alg.c neglects to set a NULL value for a certain structure member, which leads to a use-after-free in sockfs_setattrIssue Tracking;Patch;Third Party Advisory
-
https://access.redhat.com/errata/RHSA-2020:0174
RHSA-2020:0174 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://usn.ubuntu.com/3930-1/
USN-3930-1: Linux kernel vulnerabilities | Ubuntu security noticesThird Party Advisory
-
https://usn.ubuntu.com/3931-1/
USN-3931-1: Linux kernel vulnerabilities | Ubuntu security noticesThird Party Advisory
-
http://patchwork.ozlabs.org/patch/1042902/
[net-next] net: crypto set sk to NULL when af_alg_release. - PatchworkPatch;Third Party Advisory
-
http://www.securityfocus.com/bid/107063
Linux Kernel 'crypto/af_alg.c' Use After Free Arbitrary Code Execution VulnerabilityThird Party Advisory;VDB Entry
-
https://usn.ubuntu.com/3931-2/
USN-3931-2: Linux kernel (HWE) vulnerabilities | Ubuntu security noticesThird Party Advisory
-
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00052.html
[security-announce] openSUSE-SU-2019:1193-1: important: Security updateMailing List;Third Party Advisory
-
https://usn.ubuntu.com/3930-2/
USN-3930-2: Linux kernel (HWE) vulnerabilities | Ubuntu security noticesThird Party Advisory
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