Vulnerability · Published Mar 20, 2021 · Assigned by mitre
CVE-2021-28951
Medium 5.5
In plain English
A medium-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 0.3% (higher than 21% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.3%top 79.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
An issue was discovered in fs/io_uring.c in the Linux kernel through 5.11.8. It allows attackers to cause a denial of service (deadlock) because exit may be waiting to park a SQPOLL thread, but concurrently that SQPOLL thread is waiting for a signal to start, aka CID-3ebba796fa25.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | linux | 5.10.26-1 | DEBIAN-CVE-2021-28951 |
| Debian:13 | linux | 5.10.26-1 | DEBIAN-CVE-2021-28951 |
| Debian:14 | linux | 5.10.26-1 | DEBIAN-CVE-2021-28951 |
Affected products (as reported)
References
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=3ebba796fa251d042be42b929a2d916ee5c34a49 x_refsource_MISC
- FEDORA-2021-e636ce53df vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-68b0dd2373 vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-9503fffad9 vendor-advisory, x_refsource_FEDORA
- https://security.netapp.com/advisory/ntap-20210430-0003/ x_refsource_CONFIRM