{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-68189", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-16T13:41:40.253Z", "datePublished": "2025-12-16T13:43:11.507Z", "dateUpdated": "2026-08-05T12:10:08.528Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:10:08.528Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/msm: Fix GEM free for imported dma-bufs\n\nImported dma-bufs also have obj->resv != &obj->_resv. So we should\ncheck both this condition in addition to flags for handling the\n_NO_SHARE case.\n\nFixes this splat that was reported with IRIS video playback:\n\n ------------[ cut here ]------------\n WARNING: CPU: 3 PID: 2040 at drivers/gpu/drm/msm/msm_gem.c:1127 msm_gem_free_object+0x1f8/0x264 [msm]\n CPU: 3 UID: 1000 PID: 2040 Comm: .gnome-shell-wr Not tainted 6.17.0-rc7 #1 PREEMPT\n pstate: 81400005 (Nzcv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)\n pc : msm_gem_free_object+0x1f8/0x264 [msm]\n lr : msm_gem_free_object+0x138/0x264 [msm]\n sp : ffff800092a1bb30\n x29: ffff800092a1bb80 x28: ffff800092a1bce8 x27: ffffbc702dbdbe08\n x26: 0000000000000008 x25: 0000000000000009 x24: 00000000000000a6\n x23: ffff00083c72f850 x22: ffff00083c72f868 x21: ffff00087e69f200\n x20: ffff00087e69f330 x19: ffff00084d157ae0 x18: 0000000000000000\n x17: 0000000000000000 x16: ffffbc704bd46b80 x15: 0000ffffd0959540\n x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000\n x11: ffffbc702e6cdb48 x10: 0000000000000000 x9 : 000000000000003f\n x8 : ffff800092a1ba90 x7 : 0000000000000000 x6 : 0000000000000020\n x5 : ffffbc704bd46c40 x4 : fffffdffe102cf60 x3 : 0000000000400032\n x2 : 0000000000020000 x1 : ffff00087e6978e8 x0 : ffff00087e6977e8\n Call trace:\n msm_gem_free_object+0x1f8/0x264 [msm] (P)\n drm_gem_object_free+0x1c/0x30 [drm]\n drm_gem_object_handle_put_unlocked+0x138/0x150 [drm]\n drm_gem_object_release_handle+0x5c/0xcc [drm]\n drm_gem_handle_delete+0x68/0xbc [drm]\n drm_gem_close_ioctl+0x34/0x40 [drm]\n drm_ioctl_kernel+0xc0/0x130 [drm]\n drm_ioctl+0x360/0x4e0 [drm]\n __arm64_sys_ioctl+0xac/0x104\n invoke_syscall+0x48/0x104\n el0_svc_common.constprop.0+0x40/0xe0\n do_el0_svc+0x1c/0x28\n el0_svc+0x34/0xec\n el0t_64_sync_handler+0xa0/0xe4\n el0t_64_sync+0x198/0x19c\n ---[ end trace 0000000000000000 ]---\n ------------[ cut here ]------------\n\nPatchwork: https://patchwork.freedesktop.org/patch/676273/" } ], "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 bug is reached through DRM render-node ioctls (PRIME_FD_TO_HANDLE to import a foreign dma-buf, then GEM_CLOSE to free it), requiring local access to /dev/dri/renderD*; there is no network vector.\nAC:L - Importing any foreign dma-buf and closing its handle deterministically drives the free path into the type-confused branch; no race or attacker-uncontrollable condition is involved.\nPR:L - The GEM_CLOSE and PRIME_FD_TO_HANDLE ioctls are DRM_RENDER_ALLOW, so a normal unprivileged user with GPU/render-node access (any graphical session) can trigger it — no root or special capability is needed.\nUI:N - The attacker performs the import and close operations directly; no victim action is required.\nS:U - The corruption occurs within the kernel's own memory/security authority with no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - Type confusion yields a wild `r_obj` pointer whose refcount path can dereference attacker-influenced heap memory and drive a free of a fabricated object, providing a plausible primitive for kernel memory disclosure.\nI:H - The bug is a type confusion that performs a refcount decrement on a bogus pointer and can invoke drm_gem_object_free() on confused memory, giving a heap-corruption/control-flow-hijack primitive (arbitrary write class).\nA:H - Decrementing a kref at a wild offset and freeing a bogus object reliably corrupts kernel heap state and crashes the kernel (oops/panic/use-after-free)." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/gpu/drm/msm/msm_gem.c" ], "versions": [ { "version": "de651b6e040ba419418a37401e45d24f133e8a59", "lessThan": "9674c4cb2fe62727a2e4d3f66065ab949dfa61be", "status": "affected", "versionType": "git" }, { "version": "de651b6e040ba419418a37401e45d24f133e8a59", "lessThan": "c34e08ba6c0037a72a7433741225b020c989e4ae", "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/msm/msm_gem.c" ], "versions": [ { "version": "6.17", "status": "affected" }, { "version": "0", "lessThan": "6.17", "status": "unaffected", "versionType": "semver" }, { "version": "6.17.8", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18", "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": "6.17", "versionEndExcluding": "6.17.8" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.17", "versionEndExcluding": "6.18" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/9674c4cb2fe62727a2e4d3f66065ab949dfa61be" }, { "url": "https://git.kernel.org/stable/c/c34e08ba6c0037a72a7433741225b020c989e4ae" } ], "title": "drm/msm: Fix GEM free for imported dma-bufs", "x_generator": { "engine": "bippy-1.2.0" } } } }