CVE-2021-22555

Known Exploited Vulnerability Entry External Catalog

Back to Catalog View Vulnerability
Entry Details

CVE-2021-22555

Confirmed

Yes

2025-10-06 00:00 UTC

Timestamps

2025-10-06

2025-10-06

Scope

KEV entry: Linux Kernel Heap Out-of-Bounds Write Vulnerability | Affected: Linux / Kernel | Description: Linux Kernel contains a heap out-of-bounds write vulnerability that could allow an attacker to gain privileges or cause a DoS (via heap memory corruption) through user name space. | Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. | Due date: 2025-10-27 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/netfilter/x_tables.c?id=9fa492cdc160cd27ce1046cb36f47d3b2b1efa21 ; https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/netfilter/x_tables.c?id=b29c457a6511435960115c0f548c4360d5f4801d ; https://security.netapp.com/advisory/ntap-20210805-0010/ ; https://github.com/google/security-research/security/advisories/GHSA-xxx5-8mvq-3528 ; https://nvd.nist.gov/vuln/detail/CVE-2021-22555

References
  • {'id': 'CVE-2021-22555', 'url': 'https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-22555'}

c266ced1-d925-4e85-abed-4ecb621aaa53

405284c2-e461-4670-8979-7fd2c9755a60

2026-02-02 12:25 UTC

2026-02-02 12:25 UTC

Evidence (1)
Type Source Signal Confidence Details GCVE Metadata
vendor_report cisa-kev successful_exploitation 0.80
View details 
{
  "cwes": [
    "CWE-787"
  ],
  "date_added": "2025-10-06",
  "due_date": "2025-10-27",
  "feed": "CISA Known Exploited Vulnerabilities Catalog",
  "knownRansomwareCampaignUse": "Unknown",
  "product": "Kernel",
  "vendorProject": "Linux",
  "vulnerabilityName": "Linux Kernel Heap Out-of-Bounds Write Vulnerability"
}
 -
Export Options
JSON Object JSON API View Full Catalog