CVE-2022-1043
Published: 29 August 2022
Summary
CVE-2022-1043 is a high-severity Use After Free (CWE-416) vulnerability in Linux Linux Kernel. Its CVSS base score is 8.8 (High).
Operationally, ranked in the top 4.6% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
A use-after-free flaw in the Linux kernel's io_uring subsystem (CWE-416) enables memory corruption. The vulnerability affects the kernel's asynchronous I/O interface and carries a CVSS 3.1 score of 8.8 with local attack vector, low complexity, and low privileges required.
An attacker who already possesses a local account can trigger the flaw to corrupt kernel memory, crash the system, or escalate privileges to root. Public references include a functional exploit posted to Packet Storm and a Zero Day Initiative advisory confirming the same impact.
Upstream mitigation is provided by the kernel commit a30f895ad3239f45012e860d4f94c1a388b36d14; Red Hat and other distributions advise applying the corresponding kernel updates. The EPSS score has remained in the 0.18–0.23 range since disclosure, indicating moderate but stable exploitation interest.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2022-24390
Vulnerability details
A flaw was found in the Linux kernel’s io_uring implementation. This flaw allows an attacker with a local account to corrupt system memory, crash the system or escalate privileges.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Use-after-free exploits that achieve arbitrary code execution are blocked or significantly hardened by non-executable pages and ASLR.