What’s Vulnerable › Vulnerabilities

CVE-2020-35508

• Severity: medium (CVSS 4.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-03-26 · updated 2026-06-17
• Weakness: CWE-665

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 products

• Linux kernel: before 5.12; 5.12, 5.12-rc1, 5.12-rc2, 5.12-rc3, 5.12-rc4 — fixed in 5.12
• NetApp A700S Firmware: all versions
• NetApp Aff A400 Firmware: all versions
• NetApp Brocade Fabric Operating System Firmware: all versions
• NetApp Fas8300 Firmware: all versions
• NetApp Fas8700 Firmware: all versions
• NetApp H300E Firmware: all versions
• NetApp H300S Firmware: all versions
• NetApp H410C Firmware: all versions
• NetApp H410S Firmware: all versions
• NetApp H500E Firmware: all versions
• NetApp H500S Firmware: all versions
• NetApp H610C Firmware: all versions
• NetApp H610S Firmware: all versions
• NetApp H615C Firmware: all versions
• NetApp H700E Firmware: all versions
• NetApp H700S Firmware: all versions
• Red Hat Enterprise Linux: 8.0

How to fix

Upgrade to a fixed version: Linux kernel 5.12. Check the vendor advisory for mitigations.

References

• https://bugzilla.redhat.com/show_bug.cgi?id=1902724
• https://github.com/torvalds/linux/commit/b4e00444cab4c3f3fec876dc0cccc8cbb0d1a948
• https://security.netapp.com/advisory/ntap-20210513-0006/
• https://bugzilla.redhat.com/show_bug.cgi?id=1902724
• https://github.com/torvalds/linux/commit/b4e00444cab4c3f3fec876dc0cccc8cbb0d1a948
• https://security.netapp.com/advisory/ntap-20210513-0006/

Get alerted when CVE-2020-35508 or the next vulnerability affects your stack