{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-43256", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:55.996Z", "datePublished": "2026-05-06T11:28:45.209Z", "dateUpdated": "2026-08-05T12:26:55.873Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:26:55.873Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: qcom: camss: vfe: Fix out-of-bounds access in vfe_isr_reg_update()\n\nvfe_isr() iterates using MSM_VFE_IMAGE_MASTERS_NUM(7) as the loop\nbound and passes the index to vfe_isr_reg_update(). 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" } } } }