CVE-2021-22555
critical-risk
Published 2021-07-07
A heap out-of-bounds write affecting Linux since v2.6.19-rc1 was discovered in net/netfilter/x_tables.c. This allows an attacker to gain privileges or cause a DoS (via heap memory corruption) through user name space
Do I need to act?
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85.2% chance of exploitation in next 30 days
EPSS score — higher than 15% of all CVEs
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CISA KEV: actively exploited in the wild
On the Known Exploited Vulnerabilities catalog — federal agencies must patch
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1 public exploit available
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.3/10
High
ADJACENT_NETWORK
/ HIGH complexity
Affected Products (20)
References (19)
Third Party Advisory
http://packetstormsecurity.com/files/163528/Linux-Kernel-Netfilter-Heap-Out-Of-B...
Third Party Advisory
https://security.netapp.com/advisory/ntap-20210805-0010/
Third Party Advisory
http://packetstormsecurity.com/files/163528/Linux-Kernel-Netfilter-Heap-Out-Of-B...
Third Party Advisory
https://security.netapp.com/advisory/ntap-20210805-0010/
US Government Resource
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-...
76
/ 100
critical-risk
Severity
22/34 · High
Exploitability
34/34 · Critical
Exposure
20/34 · Moderate