[CISA-2026:0501] CISA Adds One Known Exploited Vulnerability to Catalog (https://secdb.nttzen.cloud/security-advisory/detail/CISA-2026:0501)CISA has added one new vulnerability to its Known Exploited Vulnerabilities Catalog, based on evidence of active exploitation. These types of vulnerabilities are a frequent attack vector for malicious cyber actors and pose significant risk to the federal enterprise.️ CVE-2026-31431 (https://secdb.nttzen.cloud/cve/detail/CVE-2026-31431)- Name: Linux Kernel Incorrect Resource Transfer Between Spheres Vulnerability- 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.- Known To Be Used in Ransomware Campaigns? Unknown- Vendor: Linux- Product: Kernel- Notes: https://lore.kernel.org/linux-cve-announce/2026042214-CVE-2026-31431-3d65@gregkh/; https://xint.io/blog/copy-fail-linux-distributions#the-fix-6 ; https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/about/ ; https://nvd.nist.gov/vuln/detail/CVE-2026-31431#SecDB #InfoSec #CVE #CISA_KEV #cisa_20260501 #cisa20260501 #cve_2026_31431 #cve202631431