Vulnerability · Published Jun 7, 2021 · Assigned by mitre
CVE-2020-36387
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 0.4% (higher than 33% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.8High
Exploit odds (30 days)0.4%top 66.6% 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 5.8.2. fs/io_uring.c has a use-after-free related to io_async_task_func and ctx reference holding, aka CID-6d816e088c35.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | linux | 5.7.17-1 | DEBIAN-CVE-2020-36387 |
| Debian:13 | linux | 5.7.17-1 | DEBIAN-CVE-2020-36387 |
| Debian:14 | linux | 5.7.17-1 | DEBIAN-CVE-2020-36387 |
Affected products (as reported)
References
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.2 x_refsource_MISC
- https://syzkaller.appspot.com/bug?id=ce5f07d6ec3b5050b8f0728a3b389aa510f2591b x_refsource_MISC
- https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-io_async_task_func x_refsource_MISC
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6d816e088c359866f9867057e04f244c608c42fe x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20210727-0006/ x_refsource_CONFIRM