Vulnerability · Published Oct 28, 2021 · Assigned by mitre
CVE-2021-43057
High 7.8
In plain English
A high-severity security flaw in the linux package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.8High
Exploit odds (30 days)0.5%top 57.6% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
An issue was discovered in the Linux kernel before 5.14.8. A use-after-free in selinux_ptrace_traceme (aka the SELinux handler for PTRACE_TRACEME) could be used by local attackers to cause memory corruption and escalate privileges, aka CID-a3727a8bac0a. This occurs because of an attempt to access the subjective credentials of another task.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | linux | 5.14.9-1 | DEBIAN-CVE-2021-43057 |
| Debian:13 | linux | 5.14.9-1 | DEBIAN-CVE-2021-43057 |
| Debian:14 | linux | 5.14.9-1 | DEBIAN-CVE-2021-43057 |
Affected products (as reported)
References
- https://bugs.chromium.org/p/project-zero/issues/detail?id=2229 x_refsource_MISC
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a3727a8bac0a9e77c70820655fd8715523ba3db7 x_refsource_MISC
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.8 x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20211125-0001/ x_refsource_CONFIRM