{"id":"CVE-2026-112007","aliases":["DEBIAN-CVE-2026-112007","EUVD-2026-103460","GHSA-qfh4-g83h-4vcx","UBUNTU-CVE-2026-112007","openSUSE-SU-2026:12410-1"],"status":"published","title":"Schism Tracker through 20260524 Heap Out-of-Bounds Write via ULT Loader","description":"Schism Tracker through 20260524 contains a heap out-of-bounds write vulnerability in fmt_ult_load_song() in fmt/ult.c that fails to clamp the one-byte sample count to MAX_SAMPLES. Attackers can supply a crafted .ult module that overwrites the instruments pointer array, causing csf_destroy() to free attacker-chosen pointers and crash the application.","severity":{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00128,"percentile":0.02482,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-787"],"published":"2026-10-18T11:38:30Z","modified":"2026-11-09T14:00:08Z","fixes":[{"ecosystem":"Debian:14","package":"schism","fixed_in":["2:20261102-1"],"sources":["osv"]},{"ecosystem":"openSUSE:Tumbleweed","package":"schismtracker","fixed_in":["20261102-1.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"schism","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:20221201-1","2:20230906-1","2:20231029-1","2:20240129-1","2:20240308-1","2:20240328-1","2:20240409-1","2:20240426-1","2:20240503-1","2:20240529-1","2:20240614-1","2:20240630-1","2:20240809-1","2:20240909-1","2:20241021-1","2:20241226-1","2:20250208-1","2:20250307-1","2:20250313-1","2:20250313-2","2:20250825-1","2:20251014-1","2:20260524-1","2:20261102-1","2:20261102-2","2:20261102-3","2:20261102-4"]},{"source":"osv","ecosystem":"Debian:13","package":"schism","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:20250313-2","2:20250825-1","2:20251014-1","2:20260524-1","2:20261102-1","2:20261102-2","2:20261102-3","2:20261102-4"]},{"source":"osv","ecosystem":"Debian:14","package":"schism","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:20261102-1"}]}],"versions":["2:20250313-2","2:20250825-1","2:20251014-1","2:20260524-1"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"schism","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:0+20110101-1build1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"schism","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:20160521-1","2:20170910-1","2:20180209-1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"schism","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:20190805-1","2:20190805-2","2:20190805-3"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"schism","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:20200412-1","2:20210525-2","2:20211116-1","2:20220125-1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"schism","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:20221201-1","2:20230906-1","2:20231029-1","2:20240129-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"schism","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:20251014-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"schism","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:20250313-2","2:20250825-1","2:20251014-1"]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"schismtracker","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"20261102-1.1"}]}]}],"products":[{"vendor":"schismtracker","product":"schism tracker"}],"references":[{"url":"https://hackmd.io/@haindpwn/schismtracker-ult-sample-count-oob-write","tags":["technical-description","exploit","evidence"]},{"url":"https://github.com/schismtracker/schismtracker/blob/74215ae300b555928332e03152dfcdc898f96ca6/fmt/ult.c#L319-L330","tags":["technical-description","article"]},{"url":"https://github.com/schismtracker/schismtracker","tags":["product","package"]},{"url":"https://www.vulncheck.com/advisories/schism-tracker-through-20260524-heap-out-of-bounds-write-via-ult-loader","tags":["third-party-advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-112007","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-qfh4-g83h-4vcx"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/112xxx/CVE-2026-112007.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-112007","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-112007","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-112007","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2026-112007","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2026-112007","title":"Schism Tracker through 20260524 Heap Out-of-Bounds Write via ULT Loader","description":"Schism Tracker through 20260524 contains a heap out-of-bounds write vulnerability in fmt_ult_load_song() in fmt/ult.c that fails to clamp the one-byte sample count to MAX_SAMPLES. Attackers can supply a crafted .ult module that overwrites the instruments pointer array, causing csf_destroy() to free attacker-chosen pointers and crash the application.","status":"published","published":"2026-10-18T11:38:30.59Z","modified":"2026-10-19T16:38:41.739Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T13:44:40.64332Z"}],"euvd":[{"id":"EUVD-2026-103460","description":"Schism Tracker through 20260524 contains a heap out-of-bounds write vulnerability in fmt_ult_load_song() in fmt/ult.c that fails to clamp the one-byte sample count to MAX_SAMPLES. Attackers can supply a crafted .ult module that overwrites the instruments pointer array, causing csf_destroy() to free attacker-chosen pointers and crash the application.","status":"published","published":"2026-10-18T11:38:30Z","modified":"2026-10-19T16:38:41Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T16:59:50.835971Z"}],"ghsa":[{"id":"GHSA-qfh4-g83h-4vcx","title":"Schism Tracker through 20260524 contains a heap out-of-bounds write vulnerability in...","description":"Schism Tracker through 20260524 contains a heap out-of-bounds write vulnerability in fmt_ult_load_song() in fmt/ult.c that fails to clamp the one-byte sample count to MAX_SAMPLES. Attackers can supply a crafted .ult module that overwrites the instruments pointer array, causing csf_destroy() to free attacker-chosen pointers and crash the application.","status":"published","published":"2026-10-18T12:30:26Z","modified":"2026-10-18T12:30:35Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/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":"medium"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H","level":"medium"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T15:13:54.281657Z"}],"nvd":[{"id":"CVE-2026-112007","description":"Schism Tracker through 20260524 contains a heap out-of-bounds write vulnerability in fmt_ult_load_song() in fmt/ult.c that fails to clamp the one-byte sample count to MAX_SAMPLES. Attackers can supply a crafted .ult module that overwrites the instruments pointer array, causing csf_destroy() to free attacker-chosen pointers and crash the application.","status":"published","published":"2026-10-18T12:17:13.097Z","modified":"2026-10-19T21:14:14.15Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/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":"medium","assessor":"secondary"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:13:00.123071Z"}],"osv":[{"id":"CVE-2026-112007","title":"Schism Tracker through 20260524 Heap Out-of-Bounds Write via ULT Loader","description":"Schism Tracker through 20260524 contains a heap out-of-bounds write vulnerability in fmt_ult_load_song() in fmt/ult.c that fails to clamp the one-byte sample count to MAX_SAMPLES. Attackers can supply a crafted .ult module that overwrites the instruments pointer array, causing csf_destroy() to free attacker-chosen pointers and crash the application.","status":"published","published":"2026-10-18T11:38:30.59Z","modified":"2026-11-04T17:27:20.00742388Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-787"],"updated_at":"2026-11-04T17:42:23.753138Z"},{"id":"DEBIAN-CVE-2026-112007","description":"Schism Tracker through 20260524 contains a heap out-of-bounds write vulnerability in fmt_ult_load_song() in fmt/ult.c that fails to clamp the one-byte sample count to MAX_SAMPLES. Attackers can supply a crafted .ult module that overwrites the instruments pointer array, causing csf_destroy() to free attacker-chosen pointers and crash the application.","status":"published","published":"2026-10-18T12:17:13.097Z","modified":"2026-11-09T14:00:08.879565744Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/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":"medium"}],"updated_at":"2026-11-09T14:31:39.434822Z"},{"id":"UBUNTU-CVE-2026-112007","description":"Schism Tracker through 20260524 contains a heap out-of-bounds write vulnerability in fmt_ult_load_song() in fmt/ult.c that fails to clamp the one-byte sample count to MAX_SAMPLES. Attackers can supply a crafted .ult module that overwrites the instruments pointer array, causing csf_destroy() to free attacker-chosen pointers and crash the application.","status":"published","published":"2026-10-18T12:17:00Z","modified":"2026-10-28T20:15:43.819919121Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H","level":"medium"},{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T16:55:59.591851Z"},{"id":"openSUSE-SU-2026:12410-1","title":"schismtracker-20261102-1.1 on GA media","description":"These are all security issues fixed in the schismtracker-20261102-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-11-03T00:00:00Z","modified":"2026-11-04T17:23:22.338288132Z","updated_at":"2026-11-04T17:43:22.558805Z"}]}}