Vulnerability · Published Dec 2, 2020 · Assigned by redhat
CVE-2020-25704
Medium 5.5
In plain English
A medium-severity memory leak in kernel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.4%top 70.9% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
A flaw memory leak in the Linux kernel performance monitoring subsystem was found in the way if using PERF_EVENT_IOC_SET_FILTER. A local user could use this flaw to starve the resources causing denial of service.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | kernel-tools-libs-devel | 4.18.0-305.el8 | ALSA-2021:1578 |
| Debian:12 | linux | 5.9.6-1 | DEBIAN-CVE-2020-25704 |
| Debian:13 | linux | 5.9.6-1 | DEBIAN-CVE-2020-25704 |
| Debian:14 | linux | 5.9.6-1 | DEBIAN-CVE-2020-25704 |
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | no fix listed | UBUNTU-CVE-2020-25704 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2020-25704 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2020-25704 |
Affected products (as reported)
Weakness: CWE-401
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1895961
- https://www.openwall.com/lists/oss-security/2020/11/09/1
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7bdb157cdebbf95a1cd94ed2e01b338714075d00
- [debian-lts-announce] 20201210 [SECURITY] [DLA 2483-1] linux-4.19 security update mailing-list
- [debian-lts-announce] 20201218 [SECURITY] [DLA 2494-1] linux security update mailing-list
- https://www.starwindsoftware.com/security/sw-20220802-0003/