Vulnerability · Published Dec 11, 2020 · Assigned by redhat
CVE-2020-27825
Medium 5.7
In plain English
A medium-severity race condition in kernel. 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 20% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.7Medium
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
A use-after-free flaw was found in kernel/trace/ring_buffer.c in Linux kernel (before 5.10-rc1). There was a race problem in trace_open and resize of cpu buffer running parallely on different cpus, may cause a denial of service problem (DOS). This flaw could even allow a local attacker with special user privilege to a kernel information leak threat.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | linux | 5.9.6-1 | DEBIAN-CVE-2020-27825 |
| Debian:13 | linux | 5.9.6-1 | DEBIAN-CVE-2020-27825 |
| Debian:14 | linux | 5.9.6-1 | DEBIAN-CVE-2020-27825 |
Affected products (as reported)
Weakness: CWE-362
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1905155 x_refsource_MISC
- DSA-4843 vendor-advisory, x_refsource_DEBIAN
- [debian-lts-announce] 20210212 [SECURITY] [DLA 2557-1] linux-4.19 security update mailing-list, x_refsource_MLIST
- [debian-lts-announce] 20210309 [SECURITY] [DLA 2586-1] linux security update mailing-list, x_refsource_MLIST
- https://security.netapp.com/advisory/ntap-20210521-0008/ x_refsource_CONFIRM