{"id":"CVE-2026-115653","aliases":["EUVD-2026-115232","GHSA-c38r-v552-gh5g"],"status":"published","title":"Cortex-M module ports save a preempted user-mode module thread's registers through its unchecked stack pointer in privileged mode","description":"In Eclipse ThreadX versions 6.0.1 through 6.5.2.202603, the PendSV handler of the Cortex-M module ports saves a preempted user-mode module thread's registers in privileged mode at addresses taken from the thread's stack pointer, without checking that pointer against the thread's stack. A user-mode, memory-protected module can thereby write up to nine words, eight of its choosing, or 25 with floating-point state, into memory immediately below any region it may write, and read back what is stored there.","severity":{"version":"4.0","score":7,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00145,"percentile":0.03804,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-787","CWE-822"],"published":"2026-11-02T15:10:18Z","modified":"2026-11-04T02:47:23Z","products":[{"vendor":"eclipse foundation","product":"eclipse threadx"}],"references":[{"url":"https://github.com/eclipse-threadx/threadx/security/advisories/GHSA-c38r-v552-gh5g","tags":["advisory"]},{"url":"https://gitlab.eclipse.org/security/cve-assignment/-/work_items/503","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115653.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-115653","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-115653","title":"Cortex-M module ports save a preempted user-mode module thread's registers through its unchecked stack pointer in privileged mode","description":"In Eclipse ThreadX versions 6.0.1 through 6.5.2.202603, the PendSV handler of the Cortex-M module ports saves a preempted user-mode module thread's registers in privileged mode at addresses taken from the thread's stack pointer, without checking that pointer against the thread's stack. A user-mode, memory-protected module can thereby write up to nine words, eight of its choosing, or 25 with floating-point state, into memory immediately below any region it may write, and read back what is stored there.","status":"published","published":"2026-11-02T15:10:18.233Z","modified":"2026-11-02T16:17:31.54Z","cvss":[{"version":"4.0","score":7,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"}],"cwes":["CWE-787","CWE-822"],"updated_at":"2026-11-02T18:00:08.034842Z"}],"euvd":[{"id":"EUVD-2026-115232","description":"In Eclipse ThreadX versions 6.0.1 through 6.5.2.202603, the PendSV handler of the Cortex-M module ports saves a preempted user-mode module thread's registers in privileged mode at addresses taken from the thread's stack pointer, without checking that pointer against the thread's stack. A user-mode, memory-protected module can thereby write up to nine words, eight of its choosing, or 25 with floating-point state, into memory immediately below any region it may write, and read back what is stored there.","status":"published","published":"2026-11-02T15:10:18Z","modified":"2026-11-02T16:17:31Z","cvss":[{"version":"4.0","score":7,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-03T05:08:40.251173Z"}],"nvd":[{"id":"CVE-2026-115653","description":"In Eclipse ThreadX versions 6.0.1 through 6.5.2.202603, the PendSV handler of the Cortex-M module ports saves a preempted user-mode module thread's registers in privileged mode at addresses taken from the thread's stack pointer, without checking that pointer against the thread's stack. A user-mode, memory-protected module can thereby write up to nine words, eight of its choosing, or 25 with floating-point state, into memory immediately below any region it may write, and read back what is stored there.","status":"published","published":"2026-11-02T16:17:28.683Z","modified":"2026-11-02T19:14:53.03Z","cvss":[{"version":"4.0","score":7,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"}],"cwes":["CWE-787","CWE-822"],"updated_at":"2026-11-03T00:02:42.67885Z"}],"osv":[{"id":"CVE-2026-115653","title":"Cortex-M module ports save a preempted user-mode module thread's registers through its unchecked stack pointer in privileged mode","description":"In Eclipse ThreadX versions 6.0.1 through 6.5.2.202603, the PendSV handler of the Cortex-M module ports saves a preempted user-mode module thread's registers in privileged mode at addresses taken from the thread's stack pointer, without checking that pointer against the thread's stack. A user-mode, memory-protected module can thereby write up to nine words, eight of its choosing, or 25 with floating-point state, into memory immediately below any region it may write, and read back what is stored there.","status":"published","published":"2026-11-02T15:10:18.233Z","modified":"2026-11-04T02:47:23.973946471Z","cvss":[{"version":"4.0","score":7,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-787","CWE-822"],"updated_at":"2026-11-04T02:53:45.692342Z"}]}}