{"id":"CVE-2026-124742","aliases":["EUVD-2026-123359","GHSA-whhw-82c4-82xv","RHSA-2026:99577","UBUNTU-CVE-2026-124742"],"status":"published","title":"Busybox: divide-by-zero in the volume_id fat prober via a zero sectors_per_cluster value","description":"A flaw was found in BusyBox. The volume identification component fails to properly validate cluster parameters when analyzing specially formatted FAT filesystems. An attacker able to present a crafted storage device or disk image can trigger a divide-by-zero condition when partition scanning utilities inspect the volume. This issue causes the probing utilities to crash unexpectedly, resulting in a Denial of Service (DoS) that can disrupt device discovery and system boot operations.","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-13","score":0.00187,"percentile":0.08364,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-369"],"published":"2026-11-11T11:19:54Z","modified":"2026-11-14T02:46:58Z","affected":[{"source":"osv","ecosystem":"Red Hat:hummingbird:1","package":"busybox","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.37.0-9.5.hum1"}]}],"bundled":2},{"source":"osv","ecosystem":"Red Hat:hummingbird:1","package":"busybox-petitboot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.37.0-9.5.hum1"}]}],"bundled":2},{"source":"osv","ecosystem":"Red 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hat","product":"red hat enterprise linux 6"},{"vendor":"red hat","product":"red hat hardened images"}],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:99577","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-124742","tags":["vdb-entry","x_refsource_REDHAT","advisory","report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2571620","tags":["issue-tracking","x_refsource_REDHAT","report"]},{"url":"https://github.com/vda-linux/busybox_mirror/commit/b7c89c4","tags":["fix","article","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-124742","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-whhw-82c4-82xv"},{"url":"https://access.redhat.com/downloads/content/package-browser/","tags":["web"]},{"url":"https://catalog.redhat.com/software/containers/","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/124xxx/CVE-2026-124742.json","tags":["advisory"]},{"url":"https://images.redhat.com/","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-88833","tags":["report"]},{"url":"https://access.redhat.com/security/updates/classification/","tags":["article"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_99577.json","tags":["advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2531347","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-88833","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88833","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-124742","tags":["advisory","report"]},{"url":"https://ubuntu.com/security/CVE-2026-124742","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-124742","title":"Busybox: divide-by-zero in the volume_id fat prober via a zero sectors_per_cluster value","description":"A flaw was found in BusyBox. The volume identification component fails to properly validate cluster parameters when analyzing specially formatted FAT filesystems. An attacker able to present a crafted storage device or disk image can trigger a divide-by-zero condition when partition scanning utilities inspect the volume. This issue causes the probing utilities to crash unexpectedly, resulting in a Denial of Service (DoS) that can disrupt device discovery and system boot operations.","status":"published","published":"2026-11-11T11:19:54.026Z","modified":"2026-11-13T13:32:57.527Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-369"],"updated_at":"2026-11-13T14:30:17.33418Z"}],"euvd":[{"id":"EUVD-2026-123359","description":"A flaw was found in BusyBox. The volume identification component fails to properly validate cluster parameters when analyzing specially formatted FAT filesystems. An attacker able to present a crafted storage device or disk image can trigger a divide-by-zero condition when partition scanning utilities inspect the volume. This issue causes the probing utilities to crash unexpectedly, resulting in a Denial of Service (DoS) that can disrupt device discovery and system boot operations.","status":"published","published":"2026-11-11T11:19:54Z","modified":"2026-11-13T13:32:57Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-13T14:38:50.649089Z"}],"ghsa":[{"id":"GHSA-whhw-82c4-82xv","title":"A flaw was found in BusyBox. The volume identification component fails to properly validate...","description":"A flaw was found in BusyBox. The volume identification component fails to properly validate cluster parameters when analyzing specially formatted FAT filesystems. An attacker able to present a crafted storage device or disk image can trigger a divide-by-zero condition when partition scanning utilities inspect the volume. This issue causes the probing utilities to crash unexpectedly, resulting in a Denial of Service (DoS) that can disrupt device discovery and system boot operations.","status":"published","published":"2026-11-11T12:31:41Z","modified":"2026-11-13T15:31:35Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-369"],"updated_at":"2026-11-13T15:51:21.353356Z"}],"nvd":[{"id":"CVE-2026-124742","description":"A flaw was found in BusyBox. The volume identification component fails to properly validate cluster parameters when analyzing specially formatted FAT filesystems. An attacker able to present a crafted storage device or disk image can trigger a divide-by-zero condition when partition scanning utilities inspect the volume. This issue causes the probing utilities to crash unexpectedly, resulting in a Denial of Service (DoS) that can disrupt device discovery and system boot operations.","status":"published","published":"2026-11-11T12:19:47.867Z","modified":"2026-11-13T14:17:50.07Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-369"],"updated_at":"2026-11-13T15:36:25.291287Z"}],"osv":[{"id":"CVE-2026-124742","title":"Busybox: divide-by-zero in the volume_id fat prober via a zero sectors_per_cluster value","description":"A flaw was found in BusyBox. The volume identification component fails to properly validate cluster parameters when analyzing specially formatted FAT filesystems. An attacker able to present a crafted storage device or disk image can trigger a divide-by-zero condition when partition scanning utilities inspect the volume. 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The volume identification component fails to properly validate cluster parameters when analyzing specially formatted FAT filesystems. An attacker able to present a crafted storage device or disk image can trigger a divide-by-zero condition when partition scanning utilities inspect the volume. This issue causes the probing utilities to crash unexpectedly, resulting in a Denial of Service (DoS) that can disrupt device discovery and system boot operations.","status":"published","published":"2026-11-12T00:00:00Z","modified":"2026-11-13T21:05:19.454270098Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-13T21:30:20.292037Z"}]}}