CVE-2026-31603

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A zero pixclock passed via FBIOPUT_VSCREENINFO\ncauses a division by zero.\n\nFix by rejecting zero pixclock in lynxfb_ops_check_var(), consistent\nwith other framebuffer drivers."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/staging/sm750fb/sm750.c"], "versions": [{"version": "81dee67e215b23f0c98182eece122b906d35765a", "lessThan": "124a43550db8a74eef080cd4573a4904efe67029", "status": "affected", "versionType": "git"}, {"version": "81dee67e215b23f0c98182eece122b906d35765a", "lessThan": "b285a8f3bbb821a93eb37c2740a68ca1d7112a59", "status": "affected", "versionType": "git"}, {"version": "81dee67e215b23f0c98182eece122b906d35765a", "lessThan": "3300b049693138852a4c6738b5f1194a1ee91ddd", "status": "affected", "versionType": "git"}, {"version": "81dee67e215b23f0c98182eece122b906d35765a", "lessThan": "779412e0e391fd4a0d12e1d1adaa7bf043de62d7", 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{"url": "https://git.kernel.org/stable/c/1412ba36597a82e928f20047f41d6c6582dafe8a"}, {"url": "https://git.kernel.org/stable/c/6144895a4335a2491c282931f1f2fa610b86339f"}, {"url": "https://git.kernel.org/stable/c/daf6733bd7c4c5015b431739ac29b0e29021096b"}, {"url": "https://git.kernel.org/stable/c/75a1621e4f91310673c9acbcbb25c2a7ff821cd3"}], "title": "staging: sm750fb: fix division by zero in ps_to_hz()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

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A zero pixclock passed via FBIOPUT_VSCREENINFO\ncauses a division by zero.\n\nFix by rejecting zero pixclock in lynxfb_ops_check_var(), consistent\nwith other framebuffer drivers."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nstaging: sm750fb: corregir divisi\u00f3n por cero en ps_to_hz()\n\nps_to_hz() es llamada desde hw_sm750_crtc_set_mode() sin validar que pixclock no es cero. Un pixclock cero pasado a trav\u00e9s de FBIOPUT_VSCREENINFO causa una divisi\u00f3n por cero.\n\nSoluci\u00f3n rechazando pixclock cero en lynxfb_ops_check_var(), consistente con otros controladores de framebuffer."}], "id": "CVE-2026-31603", "lastModified": "2026-11-11T23:10:00.263", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-04-24T15:16:39.453", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/124a43550db8a74eef080cd4573a4904efe67029"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1412ba36597a82e928f20047f41d6c6582dafe8a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2f640c6043aeab31a2f607d7605271860c3b11df"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3300b049693138852a4c6738b5f1194a1ee91ddd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6144895a4335a2491c282931f1f2fa610b86339f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/75a1621e4f91310673c9acbcbb25c2a7ff821cd3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/779412e0e391fd4a0d12e1d1adaa7bf043de62d7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b285a8f3bbb821a93eb37c2740a68ca1d7112a59"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/daf6733bd7c4c5015b431739ac29b0e29021096b"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-369"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: staging: sm750fb: fix division by zero in ps_to_hz()", "id": "2461450", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2461450"}, "csaw": false, "cwe": "CWE-369", "details": ["A flaw was found in the Linux kernel's `sm750fb` framebuffer driver. A local user can exploit this vulnerability by providing a specially crafted input with a zero `pixclock` value via the `FBIOPUT_VSCREENINFO` ioctl. This leads to a division-by-zero error in the `ps_to_hz()` function, which can result in a system crash and a Denial of Service (DoS)."], "name": "CVE-2026-31603", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-04-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-31603\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31603\nhttps://lore.kernel.org/linux-cve-announce/2026042419-CVE-2026-31603-bfce@gregkh/T"]}

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