CVE-2025-39967

{"id": "CVE-2025-39967", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-39967", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-06-10T20:42:14.769458Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "96e41fc29e8af5c5085fb8a79cab8d0d00bab86c", "lessThan": "994bdc2d23c79087fbf7dcd9544454e8ebcef877", "versionType": "git"}, {"status": "affected", "version": "39b3cffb8cf3111738ea993e2757ab382253d86a", "lessThan": "9c8ec14075c5317edd6b242f1be8167aa1e4e333", "versionType": "git"}, {"status": "affected", "version": "39b3cffb8cf3111738ea993e2757ab382253d86a", "lessThan": "b8a6e85328aeb9881531dbe89bcd2637a06c3c95", "versionType": "git"}, {"status": "affected", "version": "39b3cffb8cf3111738ea993e2757ab382253d86a", "lessThan": "a6eb9f423b3db000aaedf83367b8539f6b72dcfc", "versionType": "git"}, {"status": "affected", "version": "39b3cffb8cf3111738ea993e2757ab382253d86a", "lessThan": "adac90bb1aaf45ca66f9db8ac100be16750ace78", "versionType": "git"}, {"status": "affected", "version": "39b3cffb8cf3111738ea993e2757ab382253d86a", "lessThan": "4a4bac869560f943edbe3c2b032062f6673b13d3", "versionType": "git"}, {"status": "affected", "version": "39b3cffb8cf3111738ea993e2757ab382253d86a", "lessThan": "c0c01f9aa08c8e10e10e8c9ebb5be01a4eff6eb7", "versionType": "git"}, {"status": "affected", "version": "39b3cffb8cf3111738ea993e2757ab382253d86a", "lessThan": "1a194e6c8e1ee745e914b0b7f50fa86c89ed13fe", "versionType": "git"}, {"status": "affected", "version": "ae021a904ac82d9fc81c25329d3c465c5a7d5686", "versionType": "git"}, {"status": "affected", "version": "451bffa366f2cc0e5314807cb847f31c0226efed", "versionType": "git"}, {"status": "affected", "version": "2c455e9c5865861f5ce09c5f596909495ed7657c", "versionType": "git"}, {"status": "affected", "version": "72f099805dbc907fbe8fa19bccdc31d3e2ee6e9e", "versionType": "git"}, {"status": "affected", "version": "34cf1aff169dc6dedad8d79da7bf1b4de2773dbc", "versionType": "git"}, {"status": "affected", "version": "5.4.62", "lessThan": "5.4.300", "versionType": "semver"}, {"status": "affected", "version": "4.4.235", "lessThan": "4.5", "versionType": "semver"}, {"status": "affected", "version": "4.9.235", "lessThan": "4.10", "versionType": "semver"}, {"status": "affected", "version": "4.14.196", "lessThan": "4.15", "versionType": "semver"}, {"status": "affected", "version": "4.19.143", "lessThan": "4.20", "versionType": "semver"}, {"status": "affected", "version": "5.8.6", "lessThan": "5.9", "versionType": "semver"}], "programFiles": ["drivers/video/fbdev/core/fbcon.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.9"}, {"status": "unaffected", "version": "0", "lessThan": "5.9", "versionType": "semver"}, {"status": "unaffected", "version": "5.4.300", "versionType": "semver", "lessThanOrEqual": "5.4.*"}, {"status": "unaffected", "version": "5.10.245", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.194", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.155", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.109", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.50", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.16.10", "versionType": "semver", "lessThanOrEqual": "6.16.*"}, {"status": "unaffected", "version": "6.17", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/video/fbdev/core/fbcon.c"], "defaultStatus": "affected"}]}], "published": "2025-10-15T08:15:34.210", "references": [{"url": "https://git.kernel.org/stable/c/1a194e6c8e1ee745e914b0b7f50fa86c89ed13fe", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/4a4bac869560f943edbe3c2b032062f6673b13d3", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/994bdc2d23c79087fbf7dcd9544454e8ebcef877", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/9c8ec14075c5317edd6b242f1be8167aa1e4e333", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a6eb9f423b3db000aaedf83367b8539f6b72dcfc", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/adac90bb1aaf45ca66f9db8ac100be16750ace78", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b8a6e85328aeb9881531dbe89bcd2637a06c3c95", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/c0c01f9aa08c8e10e10e8c9ebb5be01a4eff6eb7", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-190"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfbcon: fix integer overflow in fbcon_do_set_font\n\nFix integer overflow vulnerabilities in fbcon_do_set_font() where font\nsize calculations could overflow when handling user-controlled font\nparameters.\n\nThe vulnerabilities occur when:\n1. CALC_FONTSZ(h, pitch, charcount) performs h * pith * charcount\n multiplication with user-controlled values that can overflow.\n2. FONT_EXTRA_WORDS * sizeof(int) + size addition can also overflow\n3. This results in smaller allocations than expected, leading to buffer\n overflows during font data copying.\n\nAdd explicit overflow checking using check_mul_overflow() and\ncheck_add_overflow() kernel helpers to safety validate all size\ncalculations before allocation."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nfbcon: corrige desbordamiento de entero en fbcon_do_set_font\n\nCorrige vulnerabilidades de desbordamiento de entero en fbcon_do_set_font() donde los c\u00e1lculos del tama\u00f1o de la fuente podr\u00edan desbordarse al manejar par\u00e1metros de fuente controlados por el usuario.\n\nLas vulnerabilidades ocurren cuando:\n1. CALC_FONTSZ(h, pitch, charcount) realiza la multiplicaci\u00f3n h * pith * charcount con valores controlados por el usuario que pueden desbordarse.\n2. La adici\u00f3n FONT_EXTRA_WORDS * sizeof(int) + size tambi\u00e9n puede desbordarse.\n3. Esto resulta en asignaciones m\u00e1s peque\u00f1as de lo esperado, lo que lleva a desbordamientos de b\u00fafer durante la copia de datos de la fuente.\n\nAgrega verificaci\u00f3n expl\u00edcita de desbordamiento utilizando las funciones auxiliares del kernel check_mul_overflow() y check_add_overflow() para validar de forma segura todos los c\u00e1lculos de tama\u00f1o antes de la asignaci\u00f3n."}], "lastModified": "2026-10-19T21:10:00.160", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0568BD06-B895-4C33-AE96-F6EA22C7AF67", "versionEndExcluding": "4.5", "versionStartIncluding": "4.4.235"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C5731018-BC4A-4EEC-BFBF-32326F4503AC", "versionEndExcluding": "4.10", "versionStartIncluding": "4.9.235"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": 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