MEDIUM
CVE-2020-35508
CWE-665Published: March 26, 2021· Updated: Jun 17, 2026
4.5
CVSS v3.1
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.
Technical Analysis
CVE-2020-35508 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorLocal
Attack ComplexityHigh
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityLow
AvailabilityLow
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
Affected Vendors & Products
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (6)
→
https://bugzilla.redhat.com/show_bug.cgi?id=1902724Issue Tracking · Patch · Third Party Advisory
→
https://github.com/torvalds/linux/commit/b4e00444cab4c3f3fec876dc0cccc8cbb0d1a948Patch · Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20210513-0006/Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=1902724Issue Tracking · Patch · Third Party Advisory
→
https://github.com/torvalds/linux/commit/b4e00444cab4c3f3fec876dc0cccc8cbb0d1a948Patch · Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20210513-0006/Third Party Advisory
Quick Facts
CVE IDCVE-2020-35508
CVSS Score4.5 / 10
SeverityMEDIUM
WeaknessCWE-665
CISA KEVNo
Affected3 vendor(s)
PublishedMar 26, 2021
Related CVEs (CWE-665)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2020-35508 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.