{"id":"UBUNTU-CVE-2026-35233","details":"An unprivileged attacker can craft a user-space process with a malicious ELF binary containing an out-of-range sh_link field. When root-level dtrace attaches to -- or instruments -- that process (via dtrace -p , pid probes, or USDT), the ELF parser reads heap memory beyond the allocated section cache array without any bounds check. This results in an uninitialized/out-of-bounds heap read that can cause a NULL pointer dereference crash of the dtrace process (DoS), or -- depending on heap layout -- a read-then-use of a garbage pointer controlled by adjacent allocations, providing a foothold toward further exploitation in a privileged context.","modified":"2026-05-20T16:25:35.677555971Z","published":"2026-05-01T18:16:00Z","upstream":["CVE-2026-35233"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-35233"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-35233"},{"type":"REPORT","url":"https://linux.oracle.com/cve/CVE-2026-35233.html"}],"affected":[{"package":{"name":"dtrace","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/dtrace?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.5-1","2.0.6-1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.0.6-1","binary_name":"dtrace"},{"binary_name":"dtrace-tests","binary_version":"2.0.6-1"},{"binary_name":"libdtrace2","binary_version":"2.0.6-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-35233.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L"},{"type":"Ubuntu","score":"medium"}]}