{"id":"CVE-2026-54436","aliases":["EUVD-2026-122791","GHSA-v2x4-cfj4-7hfw"],"status":"published","title":"Vulnerabilities in the QNX io-char library Impacts QNX Software Development Platform","description":"Heap-based Buffer\nOverflow in the io-char library's DCMD_CHR_WAITINFO devctl() handler could\nallow an attacker with local access to cause data tampering, arbitrary code\nexecution, or a crash in the Character I/O device driver.","severity":{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00112,"percentile":0.01406,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-122"],"published":"2026-11-10T18:42:08Z","modified":"2026-11-10T21:33:59Z","products":[{"vendor":"blackberry ltd","product":"qnx software development platform"}],"references":[{"url":"https://support.blackberry.com/pkb/s/article/141341"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54436"},{"url":"https://github.com/advisories/GHSA-v2x4-cfj4-7hfw"}],"sources":{"cve":[{"id":"CVE-2026-54436","title":"Vulnerabilities in the QNX io-char library Impacts QNX Software Development Platform","description":"Heap-based Buffer\nOverflow in the io-char library's DCMD_CHR_WAITINFO devctl() handler could\nallow an attacker with local access to cause data tampering, arbitrary code\nexecution, or a crash in the Character I/O device driver.","status":"published","published":"2026-11-10T18:42:08.067Z","modified":"2026-11-10T18:45:12.077Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-122"],"updated_at":"2026-11-10T19:39:59.74912Z"}],"euvd":[{"id":"EUVD-2026-122791","description":"Heap-based Buffer\nOverflow in the io-char library's DCMD_CHR_WAITINFO devctl() handler could\nallow an attacker with local access to cause data tampering, arbitrary code\nexecution, or a crash in the Character I/O device driver.","status":"published","published":"2026-11-10T18:42:08Z","modified":"2026-11-10T18:45:12Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-11T00:25:06.270116Z"}],"ghsa":[{"id":"GHSA-v2x4-cfj4-7hfw","title":"Heap-based Buffer\nOverflow in the io-char library's DCMD_CHR_WAITINFO devctl() handler could...","description":"Heap-based Buffer\nOverflow in the io-char library's DCMD_CHR_WAITINFO devctl() handler could\nallow an attacker with local access to cause data tampering, arbitrary code\nexecution, or a crash in the Character I/O device driver.","status":"published","published":"2026-11-10T21:33:53Z","modified":"2026-11-10T21:33:59Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-122"],"updated_at":"2026-11-10T21:57:55.411542Z"}],"nvd":[{"id":"CVE-2026-54436","description":"Heap-based Buffer\nOverflow in the io-char library's DCMD_CHR_WAITINFO devctl() handler could\nallow an attacker with local access to cause data tampering, arbitrary code\nexecution, or a crash in the Character I/O device driver.","status":"published","published":"2026-11-10T19:21:16.513Z","modified":"2026-11-10T19:21:16.513Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-122"],"updated_at":"2026-11-10T22:21:33.392456Z"}]}}