Vulnerability · Published Mar 26, 2021 · Assigned by redhat
CVE-2020-35508
Medium 4.5
In plain English
A medium-severity security flaw in kernel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)4.5Medium
Exploit odds (30 days)0.2%top 86.7% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
A flaw possibility of race condition and incorrect initialization of the process id was found in the Linux kernel child/parent process identification handling while filtering signal handlers. A local attacker is able to abuse this flaw to bypass checks to send any signal to a privileged process.
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 | 5.9.9-1 | DEBIAN-CVE-2020-35508 |
| Debian:13 | linux | 5.9.9-1 | DEBIAN-CVE-2020-35508 |
| Debian:14 | linux | 5.9.9-1 | DEBIAN-CVE-2020-35508 |
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | no fix listed | UBUNTU-CVE-2020-35508 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2020-35508 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2020-35508 |
Affected products (as reported)
Weakness: CWE-665
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1902724 x_refsource_MISC
- https://github.com/torvalds/linux/commit/b4e00444cab4c3f3fec876dc0cccc8cbb0d1a948 x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20210513-0006/ x_refsource_CONFIRM