{"id":"CVE-2026-111133","aliases":["DEBIAN-CVE-2026-111133","EUVD-2026-102260","GHSA-6q77-mgpq-cm3g","UBUNTU-CVE-2026-111133"],"status":"published","title":"libfsapfs through 20260921 Heap Out-of-Bounds Read via libfsapfs_key_encrypted_key_read_data","description":"libfsapfs through 20260921 contains an integer underflow in libfsapfs_key_encrypted_key_read_data() that allows attackers to trigger heap out-of-bounds reads via crafted KEK attributes. Attackers can supply a crafted encrypted APFS image with malformed HMAC or wrapped KEK attribute lengths to crash fsapfsinfo, pyfsapfs, dfVFS or plaso and read adjacent heap memory before password checks.","severity":{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00197,"percentile":0.09519,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-125"],"published":"2026-10-15T18:57:27Z","modified":"2026-10-28T17:50:35Z","affected":[{"source":"osv","ecosystem":"Debian:12","package":"libfsapfs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["20201107-1","20201107-1+riscv64","20201107-1.1","20201107-1.1~exp1","20240429-1","20240429-2"]},{"source":"osv","ecosystem":"Debian:13","package":"libfsapfs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["20240429-1","20240429-2"]},{"source":"osv","ecosystem":"Debian:14","package":"libfsapfs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["20240429-1","20240429-2"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"libfsapfs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["20190210-1","20190210-1build1","20190210-1ubuntu1","20190210-1.1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"libfsapfs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["20201107-1","20201107-1build1","20201107-1build2"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"libfsapfs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["20201107-1build3","20201107-1build4","20201107-1.1","20201107-1.1build1","20201107-1.1build2"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"libfsapfs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["20240429-2ubuntu1","20240429-2ubuntu2"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"libfsapfs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["20240429-1ubuntu1","20240429-2ubuntu1"]}],"products":[{"vendor":"libyal","product":"libfsapfs"}],"references":[{"url":"https://hackmd.io/@haind-pwn/libfsapfs-key-encrypted-key-attribute-oob-read","tags":["technical-description","exploit","article","report"]},{"url":"https://github.com/libyal/libfsapfs/blob/4c7c1c21f3cfc7d35f0b34b8a47f1f1562d27bbb/libfsapfs/libfsapfs_key_encrypted_key.c#L321-L333","tags":["technical-description","article","report"]},{"url":"https://github.com/libyal/libfsapfs/blob/4c7c1c21f3cfc7d35f0b34b8a47f1f1562d27bbb/libfsapfs/libfsapfs_key_encrypted_key.c#L528-L540","tags":["technical-description","article","report"]},{"url":"https://github.com/libyal/libfsapfs","tags":["product","package","report"]},{"url":"https://www.vulncheck.com/advisories/libfsapfs-through-20260921-heap-out-of-bounds-read-via-libfsapfs-key-encrypted-key-read-data","tags":["third-party-advisory","advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111133","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-6q77-mgpq-cm3g"},{"url":"https://github.com","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111133.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-111133","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-111133","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-111133","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-111133","title":"libfsapfs through 20260921 Heap Out-of-Bounds Read via libfsapfs_key_encrypted_key_read_data","description":"libfsapfs through 20260921 contains an integer underflow in libfsapfs_key_encrypted_key_read_data() that allows attackers to trigger heap out-of-bounds reads via crafted KEK attributes. Attackers can supply a crafted encrypted APFS image with malformed HMAC or wrapped KEK attribute lengths to crash fsapfsinfo, pyfsapfs, dfVFS or plaso and read adjacent heap memory before password checks.","status":"published","published":"2026-10-15T18:57:27.812Z","modified":"2026-10-15T19:45:11.041Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/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:L/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:20:15.34316Z"}],"euvd":[{"id":"EUVD-2026-102260","description":"libfsapfs through 20260921 contains an integer underflow in libfsapfs_key_encrypted_key_read_data() that allows attackers to trigger heap out-of-bounds reads via crafted KEK attributes. Attackers can supply a crafted encrypted APFS image with malformed HMAC or wrapped KEK attribute lengths to crash fsapfsinfo, pyfsapfs, dfVFS or plaso and read adjacent heap memory before password checks.","status":"published","published":"2026-10-15T18:57:27Z","modified":"2026-10-15T19:45:11Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T17:00:10.305867Z"}],"ghsa":[{"id":"GHSA-6q77-mgpq-cm3g","title":"libfsapfs through 20260921 contains an integer underflow in libfsapfs_key_encrypted_key_read_data...","description":"libfsapfs through 20260921 contains an integer underflow in libfsapfs_key_encrypted_key_read_data() that allows attackers to trigger heap out-of-bounds reads via crafted KEK attributes. Attackers can supply a crafted encrypted APFS image with malformed HMAC or wrapped KEK attribute lengths to crash fsapfsinfo, pyfsapfs, dfVFS or plaso and read adjacent heap memory before password checks.","status":"published","published":"2026-10-15T21:36:03Z","modified":"2026-10-15T21:36:11Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/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:L/I:N/A:H","level":"medium"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T15:13:49.297576Z"}],"nvd":[{"id":"CVE-2026-111133","description":"libfsapfs through 20260921 contains an integer underflow in libfsapfs_key_encrypted_key_read_data() that allows attackers to trigger heap out-of-bounds reads via crafted KEK attributes. Attackers can supply a crafted encrypted APFS image with malformed HMAC or wrapped KEK attribute lengths to crash fsapfsinfo, pyfsapfs, dfVFS or plaso and read adjacent heap memory before password checks.","status":"published","published":"2026-10-15T19:17:26.957Z","modified":"2026-10-16T18:25:45.343Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/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:L/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:12:59.751798Z"}],"osv":[{"id":"CVE-2026-111133","title":"libfsapfs through 20260921 Heap Out-of-Bounds Read via libfsapfs_key_encrypted_key_read_data","description":"libfsapfs through 20260921 contains an integer underflow in libfsapfs_key_encrypted_key_read_data() that allows attackers to trigger heap out-of-bounds reads via crafted KEK attributes. Attackers can supply a crafted encrypted APFS image with malformed HMAC or wrapped KEK attribute lengths to crash fsapfsinfo, pyfsapfs, dfVFS or plaso and read adjacent heap memory before password checks.","status":"published","published":"2026-10-15T18:57:27.812Z","modified":"2026-10-28T02:31:00.137664985Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T15:44:55.61515Z"},{"id":"DEBIAN-CVE-2026-111133","description":"libfsapfs through 20260921 contains an integer underflow in libfsapfs_key_encrypted_key_read_data() that allows attackers to trigger heap out-of-bounds reads via crafted KEK attributes. Attackers can supply a crafted encrypted APFS image with malformed HMAC or wrapped KEK attribute lengths to crash fsapfsinfo, pyfsapfs, dfVFS or plaso and read adjacent heap memory before password checks.","status":"published","published":"2026-10-15T19:17:26.957Z","modified":"2026-10-23T17:47:30.071485389Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/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":"2026-11-02T15:45:49.824149Z"},{"id":"UBUNTU-CVE-2026-111133","description":"libfsapfs through 20260921 contains an integer underflow in libfsapfs_key_encrypted_key_read_data() that allows attackers to trigger heap out-of-bounds reads via crafted KEK attributes. Attackers can supply a crafted encrypted APFS image with malformed HMAC or wrapped KEK attribute lengths to crash fsapfsinfo, pyfsapfs, dfVFS or plaso and read adjacent heap memory before password checks.","status":"published","published":"2026-10-15T19:17:00Z","modified":"2026-10-28T17:50:35Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/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:L/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T16:55:59.591851Z"}]}}