{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-46209", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.105Z", "datePublished": "2026-05-28T09:40:27.092Z", "dateUpdated": "2026-05-28T09:40:27.092Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-28T09:40:27.092Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_funcs()\n\ndrm_gem_fb_init_with_funcs() computes sub-sampled plane dimensions\nusing plain integer division:\n\n unsigned int width = mode_cmd->width / (i ? info->hsub : 1);\n unsigned int height = mode_cmd->height / (i ? info->vsub : 1);\n\nHowever, the ioctl-level framebuffer_check() in drm_framebuffer.c uses\ndrm_format_info_plane_width/height() which round up dimensions via\nDIV_ROUND_UP(). This inconsistency corrupts the subsequent GEM object\nsize check for certain pixel format and dimension combinations.\n\nFor example, with NV12 (vsub=2) and a 1-pixel-tall framebuffer the\nGEM size validation path sees height=0 instead of height=1. The\nexpression (height - 1) then wraps to UINT_MAX as an unsigned int,\ncausing min_size to overflow and wrap back to a small value. A tiny\nGEM object therefore passes the size guard, yet when the GPU accesses\nthe chroma plane it will read or write memory beyond the object's\nbounds.\n\nFix by replacing the open-coded divisions with drm_format_info_plane_width()\nand drm_format_info_plane_height(), which use DIV_ROUND_UP() and match\nthe calculation already used in framebuffer_check()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/drm_gem_framebuffer_helper.c"], "versions": [{"version": "4c3dbb2c312c9fafbac30d98c523b8b1f3455d78", "lessThan": "6b992591e04f2cce813bcf239b354f375bbf84d3", "status": "affected", "versionType": "git"}, {"version": "4c3dbb2c312c9fafbac30d98c523b8b1f3455d78", "lessThan": "1da4ab7189f1064b3b712b388772c008b4d82580", "status": "affected", "versionType": "git"}, {"version": "4c3dbb2c312c9fafbac30d98c523b8b1f3455d78", "lessThan": "1a17ea9861e89585361caa8bc231bd22dc6dbe7d", "status": "affected", "versionType": "git"}, {"version": "4c3dbb2c312c9fafbac30d98c523b8b1f3455d78", "lessThan": "c5fc49d8470c5ebf3b41607600f277158f159950", "status": "affected", "versionType": "git"}, {"version": "4c3dbb2c312c9fafbac30d98c523b8b1f3455d78", "lessThan": "3d4c2268bd7243c3780fe32bf24ff876da272acf", "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/gpu/drm/drm_gem_framebuffer_helper.c"], "versions": [{"version": "4.14", "status": "affected"}, {"version": "0", "lessThan": "4.14", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.140", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.90", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.32", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.9", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1-rc2", "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": "4.14", "versionEndExcluding": "6.6.140"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.12.90"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.18.32"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "7.0.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "7.1-rc2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/6b992591e04f2cce813bcf239b354f375bbf84d3"}, {"url": "https://git.kernel.org/stable/c/1da4ab7189f1064b3b712b388772c008b4d82580"}, {"url": "https://git.kernel.org/stable/c/1a17ea9861e89585361caa8bc231bd22dc6dbe7d"}, {"url": "https://git.kernel.org/stable/c/c5fc49d8470c5ebf3b41607600f277158f159950"}, {"url": "https://git.kernel.org/stable/c/3d4c2268bd7243c3780fe32bf24ff876da272acf"}], "title": "drm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_funcs()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_funcs()\n\ndrm_gem_fb_init_with_funcs() computes sub-sampled plane dimensions\nusing plain integer division:\n\n unsigned int width = mode_cmd->width / (i ? info->hsub : 1);\n unsigned int height = mode_cmd->height / (i ? info->vsub : 1);\n\nHowever, the ioctl-level framebuffer_check() in drm_framebuffer.c uses\ndrm_format_info_plane_width/height() which round up dimensions via\nDIV_ROUND_UP(). This inconsistency corrupts the subsequent GEM object\nsize check for certain pixel format and dimension combinations.\n\nFor example, with NV12 (vsub=2) and a 1-pixel-tall framebuffer the\nGEM size validation path sees height=0 instead of height=1. The\nexpression (height - 1) then wraps to UINT_MAX as an unsigned int,\ncausing min_size to overflow and wrap back to a small value. A tiny\nGEM object therefore passes the size guard, yet when the GPU accesses\nthe chroma plane it will read or write memory beyond the object's\nbounds.\n\nFix by replacing the open-coded divisions with drm_format_info_plane_width()\nand drm_format_info_plane_height(), which use DIV_ROUND_UP() and match\nthe calculation already used in framebuffer_check()."}], "id": "CVE-2026-46209", "lastModified": "2026-05-28T13:44:01.663", "metrics": {}, "published": "2026-05-28T10:16:36.567", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1a17ea9861e89585361caa8bc231bd22dc6dbe7d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1da4ab7189f1064b3b712b388772c008b4d82580"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3d4c2268bd7243c3780fe32bf24ff876da272acf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6b992591e04f2cce813bcf239b354f375bbf84d3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c5fc49d8470c5ebf3b41607600f277158f159950"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{}

{"created": "2026-05-28T12:45:06.856008+00:00", "updated": "2026-05-28T12:45:06.856019+00:00", "vendors": [], "weaknesses": ["CWE-190", "CWE-119"]}