PatchSiren

PatchSiren cyber security CVE debrief

CVE-2022-0847 Linux CVE debrief

CVE-2022-0847 is a Linux kernel privilege escalation vulnerability that CISA added to its Known Exploited Vulnerabilities catalog on 2022-04-25. Because it is listed in KEV, defenders should treat it as an active-risk issue and prioritize remediation on affected Linux systems, especially hosts that are widely deployed or externally reachable. CISA’s catalog entry specifies a mitigation deadline of 2022-05-16 and directs organizations to apply updates per vendor instructions.

Vendor
Linux
Product
Kernel
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2022-04-25
Original CVE updated
2022-04-25
Advisory published
2022-04-25
Advisory updated
2022-04-25

Who should care

Linux administrators, security teams, cloud and container platform operators, endpoint management teams, and any organization running Linux kernel-based systems should prioritize this CVE. It is especially important for teams responsible for production servers, internet-facing systems, and fleets where kernel updates must be coordinated carefully.

Technical summary

The supplied source data identifies CVE-2022-0847 as a Linux Kernel privilege escalation vulnerability. The key defensive signal available here is its inclusion in CISA’s Known Exploited Vulnerabilities catalog, which indicates known exploitation in the wild. The provided metadata does not include CVSS, affected kernel versions, root cause details, or proof-of-concept behavior, so remediation guidance should stay at the level of patching and verification using vendor advisories and official records.

Defensive priority

High. A KEV listing means the vulnerability should be prioritized for rapid remediation according to CISA guidance and vendor instructions. Even without a CVSS score in the supplied data, known exploitation makes this a time-sensitive patching item.

Recommended defensive actions

  • Apply the relevant Linux vendor kernel updates as soon as they are available and validated.
  • Inventory Linux systems to identify which hosts may be running affected kernel builds or unmanaged distributions.
  • Prioritize remediation for externally exposed systems, critical servers, and shared infrastructure.
  • Verify patch deployment after maintenance windows and confirm reboot requirements were completed where needed.
  • Track CISA KEV and vendor advisories for any additional guidance or follow-on fixes.
  • If immediate patching is not possible, apply compensating controls that reduce exposure while preserving availability, then schedule urgent remediation.

Evidence notes

The supplied source item metadata classifies the issue as a CISA KEV entry for vendor Project Linux, product Kernel, named 'Linux Kernel Privilege Escalation Vulnerability.' It records dateAdded as 2022-04-25, dueDate as 2022-05-16, knownRansomwareCampaignUse as Unknown, and requiredAction as 'Apply updates per vendor instructions.' Official links provided in the corpus include the CVE record, NVD detail page, and CISA KEV catalog.

Official resources

CISA listed CVE-2022-0847 in the Known Exploited Vulnerabilities catalog on 2022-04-25 and set a remediation due date of 2022-05-16. The source data provided here does not include exploit details or affected-version specifics beyond the CVE