{"id":"CVE-2026-106026","aliases":["DEBIAN-CVE-2026-106026","EUVD-2026-93395","GHSA-w9pp-27r4-r6rj","UBUNTU-CVE-2026-106026"],"status":"published","title":"tftp-hpa 5.4 before 6.0 Out-of-Bounds Read via tftpd Remap Jump Rule","description":"tftp-hpa 5.4 before 6.0 contains an out-of-bounds read vulnerability in rewrite_string() in tftpd/remap.c that walks heap memory during jump label searches. Unauthenticated remote attackers can send read or write requests whose filename matches a remap jump rule to crash the forked in.tftpd request handler.","severity":{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00368,"percentile":0.3109,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-125"],"published":"2026-10-06T13:35:48Z","modified":"2026-10-28T02:30:24Z","fixes":[{"ecosystem":"Debian:14","package":"tftp-hpa","fixed_in":["7.1-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"tftp-hpa","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2+20150808-1.4","5.2+20150808-2","5.2+20240610-1","5.2+20240610-2","5.2+20240610-3","5.3+20251110-1","5.3+20251116-1","5.3+20251209-1","5.3+20251209-2","5.4-1","5.4-2","7.1-1","7.2+20261013-1","7.2+20261013-2","7.2-1","7.2-2","7.2-3"]},{"source":"osv","ecosystem":"Debian:13","package":"tftp-hpa","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2+20240610-3","5.3+20251110-1","5.3+20251116-1","5.3+20251209-1","5.3+20251209-2","5.4-1","5.4-2","7.1-1","7.2+20261013-1","7.2+20261013-2","7.2-1","7.2-2","7.2-3"]},{"source":"osv","ecosystem":"Debian:14","package":"tftp-hpa","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.1-1"}]}],"versions":["5.2+20240610-3","5.3+20251110-1","5.3+20251116-1","5.3+20251209-1","5.3+20251209-2","5.4-1","5.4-2"]},{"source":"osv","ecosystem":"Ubuntu:14.04:LTS","package":"tftp-hpa","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2-7ubuntu3","5.2-7ubuntu3.1"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"tftp-hpa","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2+20140608-3ubuntu1","5.2+20150808-1ubuntu1","5.2+20150808-1ubuntu1.16.04.1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"tftp-hpa","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2+20150808-1ubuntu3"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"tftp-hpa","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2+20150808-1ubuntu3","5.2+20150808-1ubuntu4"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"tftp-hpa","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2+20150808-1.2build1","5.2+20150808-1.2build2"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"tftp-hpa","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2+20150808-1.4","5.2+20150808-1.4build1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"tftp-hpa","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.3+20251209-2","5.4-1","5.4-2"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"tftp-hpa","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2+20240610-3","5.3+20251110-1","5.3+20251116-1","5.3+20251209-1","5.3+20251209-2"]}],"products":[{"vendor":"h. peter anvin","product":"tftp-hpa"}],"references":[{"url":"https://git.kernel.org/pub/scm/network/tftp/tftp-hpa.git/commit/?id=6735086fb6475c3e1f1daf9829836b3d06f14291","tags":["patch","fix","report"]},{"url":"https://git.kernel.org/pub/scm/network/tftp/tftp-hpa.git/tree/tftpd/remap.c?h=tftp-hpa-5.4#n762","tags":["technical-description","article"]},{"url":"https://git.kernel.org/pub/scm/network/tftp/tftp-hpa.git/","tags":["product","web"]},{"url":"https://www.vulncheck.com/advisories/tftp-hpa-5.4-before-6.0-out-of-bounds-read-via-tftpd-remap-jump-rule","tags":["third-party-advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-106026","tags":["advisory"]},{"url":"https://git.kernel.org/pub/scm/network/tftp/tftp-hpa.git","tags":["package"]},{"url":"https://github.com/advisories/GHSA-w9pp-27r4-r6rj"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106026.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-106026","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-106026","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-106026","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-106026","title":"tftp-hpa 5.4 before 6.0 Out-of-Bounds Read via tftpd Remap Jump Rule","description":"tftp-hpa 5.4 before 6.0 contains an out-of-bounds read vulnerability in rewrite_string() in tftpd/remap.c that walks heap memory during jump label searches. Unauthenticated remote attackers can send read or write requests whose filename matches a remap jump rule to crash the forked in.tftpd request handler.","status":"published","published":"2026-10-06T13:35:48.642Z","modified":"2026-10-06T17:15:34.212Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"},{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low","assessor":"cna"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:20:04.156238Z"}],"euvd":[{"id":"EUVD-2026-93395","description":"tftp-hpa 5.4 before 6.0 contains an out-of-bounds read vulnerability in rewrite_string() in tftpd/remap.c that walks heap memory during jump label searches. Unauthenticated remote attackers can send read or write requests whose filename matches a remap jump rule to crash the forked in.tftpd request handler.","status":"published","published":"2026-10-06T13:35:48Z","modified":"2026-10-06T17:15:34Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T17:27:37.140631Z"}],"ghsa":[{"id":"GHSA-w9pp-27r4-r6rj","title":"tftp-hpa 5.4 before 6.0 contains an out-of-bounds read vulnerability in rewrite_string() in tftpd...","description":"tftp-hpa 5.4 before 6.0 contains an out-of-bounds read vulnerability in rewrite_string() in tftpd/remap.c that walks heap memory during jump label searches. Unauthenticated remote attackers can send read or write requests whose filename matches a remap jump rule to crash the forked in.tftpd request handler.","status":"published","published":"2026-10-06T15:31:59Z","modified":"2026-10-06T15:32:06Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/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":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T15:12:51.459076Z"}],"nvd":[{"id":"CVE-2026-106026","description":"tftp-hpa 5.4 before 6.0 contains an out-of-bounds read vulnerability in rewrite_string() in tftpd/remap.c that walks heap memory during jump label searches. Unauthenticated remote attackers can send read or write requests whose filename matches a remap jump rule to crash the forked in.tftpd request handler.","status":"published","published":"2026-10-06T14:17:42.083Z","modified":"2026-10-06T18:16:50.933Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/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":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low","assessor":"secondary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:12:54.486849Z"}],"osv":[{"id":"CVE-2026-106026","title":"tftp-hpa 5.4 before 6.0 Out-of-Bounds Read via tftpd Remap Jump Rule","description":"tftp-hpa 5.4 before 6.0 contains an out-of-bounds read vulnerability in rewrite_string() in tftpd/remap.c that walks heap memory during jump label searches. Unauthenticated remote attackers can send read or write requests whose filename matches a remap jump rule to crash the forked in.tftpd request handler.","status":"published","published":"2026-10-06T13:35:48.642Z","modified":"2026-10-28T02:30:24.974365977Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T15:44:54.583213Z"},{"id":"DEBIAN-CVE-2026-106026","description":"tftp-hpa 5.4 before 6.0 contains an out-of-bounds read vulnerability in rewrite_string() in tftpd/remap.c that walks heap memory during jump label searches. Unauthenticated remote attackers can send read or write requests whose filename matches a remap jump rule to crash the forked in.tftpd request handler.","status":"published","published":"2026-10-06T14:17:42.083Z","modified":"2026-10-18T04:00:07.616709022Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/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":"2026-11-02T15:45:48.903138Z"},{"id":"UBUNTU-CVE-2026-106026","description":"tftp-hpa 5.4 before 6.0 contains an out-of-bounds read vulnerability in rewrite_string() in tftpd/remap.c that walks heap memory during jump label searches. Unauthenticated remote attackers can send read or write requests whose filename matches a remap jump rule to crash the forked in.tftpd request handler.","status":"published","published":"2026-10-06T14:17:00Z","modified":"2026-10-17T12:58:00.081910404Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low"},{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T16:55:59.130573Z"}]}}