Vulnerability · Published Aug 7, 2021 · Assigned by mitre
CVE-2021-38166
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 0.3% (higher than 25% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.8High
Exploit odds (30 days)0.3%top 75.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
In kernel/bpf/hashtab.c in the Linux kernel through 5.13.8, there is an integer overflow and out-of-bounds write when many elements are placed in a single bucket. NOTE: exploitation might be impractical without the CAP_SYS_ADMIN capability.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | linux | 5.14.6-1 | DEBIAN-CVE-2021-38166 |
| Debian:13 | linux | 5.14.6-1 | DEBIAN-CVE-2021-38166 |
| Debian:14 | linux | 5.14.6-1 | DEBIAN-CVE-2021-38166 |
Affected products (as reported)
References
- https://lore.kernel.org/bpf/20210806150419.109658-1-th.yasumatsu%40gmail.com/ x_refsource_MISC
- https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=c4eb1f403243fc7bbb7de644db8587c03de36da6 x_refsource_MISC
- FEDORA-2021-b22606e88b vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-f35f45a76f vendor-advisory, x_refsource_FEDORA
- https://security.netapp.com/advisory/ntap-20210909-0001/ x_refsource_CONFIRM
- DSA-4978 vendor-advisory, x_refsource_DEBIAN