CVE-2026-43256

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However,\nvfe->line[] array is defined with VFE_LINE_NUM_MAX(4):\n\n struct vfe_line line[VFE_LINE_NUM_MAX];\n\nWhen index is 4, 5, 6, the access to vfe->line[line_id] exceeds\nthe array bounds and resulting in out-of-bounds memory access.\n\nFix this by using separate loops for output lines and write masters."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerable path is reached through local V4L2/media device use, where a process starts CAMSS camera streaming and the hardware interrupt enters vfe_isr(). It is not directly network-facing and does not require physical hotplug beyond the affected built-in camera hardware.\nAC:L - On SM8250 VFE-lite, ordinary bus completion bits overlap the erroneous RDI_RUP checks for indices 4-6, so normal streaming interrupts can pass out-of-bounds line IDs. No race or condition outside the attacker's control is required once streaming is active.\nPR:L - The driver has no capable() or administrator-only check on this path; access is governed by V4L2 device-node or camera-service permissions. This is basic local privilege, not real root in the init namespace.\nUI:N - A malicious local process with access to the camera device can configure buffers and start streaming itself. No separate victim action is required.\nS:U - The impact remains within the kernel/CAMSS security authority. There is no guest-to-host, IOMMU, or other cross-scope boundary bypass.\nC:H - The bug performs out-of-bounds reads from kernel memory beyond vfe->line[]. Because this is repeatable kernel memory corruption, high confidentiality impact is defensible.\nI:H - If the out-of-bounds wait_reg_update field is nonzero, the ISR writes to out-of-bounds memory and calls complete() on an out-of-bounds completion object. This can corrupt adjacent kernel objects, so integrity impact is high.\nA:H - The out-of-bounds access and possible complete() on invalid memory occur in interrupt context and can cause an oops or panic. The trigger can be repeated by restarting or continuing camera streaming."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/media/platform/qcom/camss/camss-vfe-480.c"], "versions": [{"version": "4edc8eae715cecf5f8bf12a0c77c281f336c37db", "lessThan": "e6cbf765686fb6c1d8f2530b3daf6c66efc92f5d", "status": "affected", "versionType": "git"}, {"version": "4edc8eae715cecf5f8bf12a0c77c281f336c37db", "lessThan": "0c074e80921fd18984b75836730d76c768c84f65", "status": "affected", "versionType": "git"}, {"version": "4edc8eae715cecf5f8bf12a0c77c281f336c37db", "lessThan": "1b103307df6d461a0731be25aca69ad0335b0933", "status": "affected", "versionType": "git"}, {"version": "4edc8eae715cecf5f8bf12a0c77c281f336c37db", "lessThan": "fade67c88870f497a13ed450ba01f7236c92dd9b", "status": "affected", "versionType": "git"}, {"version": "4edc8eae715cecf5f8bf12a0c77c281f336c37db", "lessThan": "e7a38ecda2498e7ce998793ac2a46ca47317635d", "status": "affected", "versionType": "git"}, {"version": "4edc8eae715cecf5f8bf12a0c77c281f336c37db", "lessThan": "d965919af524e68cb2ab1a685872050ad2ee933d", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/media/platform/qcom/camss/camss-vfe-480.c"], "versions": [{"version": "5.18", "status": "affected"}, {"version": "0", "lessThan": "5.18", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.167", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.128", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.75", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.16", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.6", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.1.167"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.6.128"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.12.75"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.18.16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.19.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/e6cbf765686fb6c1d8f2530b3daf6c66efc92f5d"}, {"url": "https://git.kernel.org/stable/c/0c074e80921fd18984b75836730d76c768c84f65"}, {"url": "https://git.kernel.org/stable/c/1b103307df6d461a0731be25aca69ad0335b0933"}, {"url": "https://git.kernel.org/stable/c/fade67c88870f497a13ed450ba01f7236c92dd9b"}, {"url": "https://git.kernel.org/stable/c/e7a38ecda2498e7ce998793ac2a46ca47317635d"}, {"url": "https://git.kernel.org/stable/c/d965919af524e68cb2ab1a685872050ad2ee933d"}], "title": "media: qcom: camss: vfe: Fix out-of-bounds access in vfe_isr_reg_update()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

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However,\nvfe->line[] array is defined with VFE_LINE_NUM_MAX(4):\n\n struct vfe_line line[VFE_LINE_NUM_MAX];\n\nWhen index is 4, 5, 6, the access to vfe->line[line_id] exceeds\nthe array bounds and resulting in out-of-bounds memory access.\n\nFix this by using separate loops for output lines and write masters."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nmedia: qcom: camss: vfe: Correcci\u00f3n de acceso fuera de l\u00edmites en vfe_isr_reg_update()\n\nvfe_isr() itera utilizando MSM_VFE_IMAGE_MASTERS_NUM(7) como l\u00edmite del bucle y pasa el \u00edndice a vfe_isr_reg_update(). Sin embargo, el array vfe -> line[] est\u00e1 definido con VFE_LINE_NUM_MAX(4):\n\n struct vfe_line line[VFE_LINE_NUM_MAX];\n\nCuando el \u00edndice es 4, 5, 6, el acceso a vfe -> line[line_id] excede los l\u00edmites del array y resulta en un acceso a memoria fuera de l\u00edmites.\n\nEsto se soluciona utilizando bucles separados para l\u00edneas de salida y maestros de escritura."}], "id": "CVE-2026-43256", "lastModified": "2026-11-11T20:10:00.273", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-05-06T12:16:46.397", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0c074e80921fd18984b75836730d76c768c84f65"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1b103307df6d461a0731be25aca69ad0335b0933"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d965919af524e68cb2ab1a685872050ad2ee933d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e6cbf765686fb6c1d8f2530b3daf6c66efc92f5d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e7a38ecda2498e7ce998793ac2a46ca47317635d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fade67c88870f497a13ed450ba01f7236c92dd9b"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: media: qcom: camss: vfe: Fix out-of-bounds access in vfe_isr_reg_update()", "id": "2467211", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467211"}, "csaw": false, "cwe": "CWE-805", "details": ["A flaw was found in the Linux kernel's media subsystem, specifically within the Qualcomm Camera Subsystem (CAMSS) Video Front End (VFE) driver. An out-of-bounds memory access can occur in the `vfe_isr_reg_update()` function when processing interrupt service routines. This vulnerability arises because a loop iterates beyond the allocated array bounds, potentially allowing a local attacker to cause a denial of service (DoS) or information disclosure."], "name": "CVE-2026-43256", "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": "2026-05-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43256\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43256\nhttps://lore.kernel.org/linux-cve-announce/2026050605-CVE-2026-43256-cc2e@gregkh/T"]}

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