CVE-2021-22555
Out-of-bounds Write — is CVE-2021-22555real, exploitable, or a false positive? Here's the community ground truth.
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
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
References
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Community ground truth
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Field notes & remediation
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- 0
Confirmed exploited in the wild — listed in the CISA KEV catalog (added 2025-10-06). Treat as real and prioritize patching over triage.
Related CVEs
Same weakness — CWE-787 · Out-of-bounds Write.
- CVE-2015-3113CVSS 9.8KEVEPSS 100%
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Heap buffer overflow in libwebp in Google Chrome prior to 116.0.5845.187 and libwebp 1.3.2 allowed a remote attacker to perform an out of bounds memory write via a crafted HTML page. (Chromium security severity: Critical)
- CVE-2023-34048CVSS 9.8KEVEPSS 99%
vCenter Server contains an out-of-bounds write vulnerability in the implementation of the DCERPC protocol. A malicious actor with network access to vCenter Server may trigger an out-of-bounds write potentially leading to remote code execution.
- CVE-2008-2992CVSS 7.8KEVEPSS 98%
Stack-based buffer overflow in Adobe Acrobat and Reader 8.1.2 and earlier allows remote attackers to execute arbitrary code via a PDF file that calls the util.printf JavaScript function with a crafted format string argument, a related issue to CVE-2008-1104.
- CVE-2015-1641CVSS 7.8KEVEPSS 97%
Microsoft Word 2007 SP3, Office 2010 SP2, Word 2010 SP2, Word 2013 SP1, Word 2013 RT SP1, Word for Mac 2011, Office Compatibility Pack SP3, Word Automation Services on SharePoint Server 2010 SP2 and 2013 SP1, and Office Web Apps Server 2010 SP2 and 2013 SP1 allow remote attackers to execute arbitrary code via a crafted RTF document, aka "Microsoft Office Memory Corruption Vulnerability."
- CVE-2019-5544CVSS 9.8KEVEPSS 97%
OpenSLP as used in ESXi and the Horizon DaaS appliances has a heap overwrite issue. VMware has evaluated the severity of this issue to be in the Critical severity range with a maximum CVSSv3 base score of 9.8.