{"id":"CVE-2025-37761","state":"PUBLISHED","title":"drm/xe: Fix an out-of-bounds shift when invalidating TLB","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe: Fix an out-of-bounds shift when invalidating TLB\n\nWhen the size of the range invalidated is larger than\nrounddown_pow_of_two(ULONG_MAX),\nThe function macro roundup_pow_of_two(length) will hit an out-of-bounds\nshift [1].\n\nUse a full TLB invalidation for such cases.\nv2:\n- Use a define for the range size limit over which we use a full\n  TLB invalidation. (Lucas)\n- Use a better calculation of the limit.\n\n[1]:\n[   39.202421] ------------[ cut here ]------------\n[   39.202657] UBSAN: shift-out-of-bounds in ./include/linux/log2.h:57:13\n[   39.202673] shift exponent 64 is too large for 64-bit type 'long unsigned int'\n[   39.202688] CPU: 8 UID: 0 PID: 3129 Comm: xe_exec_system_ Tainted: G     U             6.14.0+ #10\n[   39.202690] Tainted: [U]=USER\n[   39.202690] Hardware name: ASUS System Product Name/PRIME B560M-A AC, BIOS 2001 02/01/2023\n[   39.202691] Call Trace:\n[   39.202692]  <TASK>\n[   39.202695]  dump_stack_lvl+0x6e/0xa0\n[   39.202699]  ubsan_epilogue+0x5/0x30\n[   39.202701]  __ubsan_handle_shift_out_of_bounds.cold+0x61/0xe6\n[   39.202705]  xe_gt_tlb_invalidation_range.cold+0x1d/0x3a [xe]\n[   39.202800]  ? find_held_lock+0x2b/0x80\n[   39.202803]  ? mark_held_locks+0x40/0x70\n[   39.202806]  xe_svm_invalidate+0x459/0x700 [xe]\n[   39.202897]  drm_gpusvm_notifier_invalidate+0x4d/0x70 [drm_gpusvm]\n[   39.202900]  __mmu_notifier_release+0x1f5/0x270\n[   39.202905]  exit_mmap+0x40e/0x450\n[   39.202912]  __mmput+0x45/0x110\n[   39.202914]  exit_mm+0xc5/0x130\n[   39.202916]  do_exit+0x21c/0x500\n[   39.202918]  ? lockdep_hardirqs_on_prepare+0xdb/0x190\n[   39.202920]  do_group_exit+0x36/0xa0\n[   39.202922]  get_signal+0x8f8/0x900\n[   39.202926]  arch_do_signal_or_restart+0x35/0x100\n[   39.202930]  syscall_exit_to_user_mode+0x1fc/0x290\n[   39.202932]  do_syscall_64+0xa1/0x180\n[   39.202934]  ? do_user_addr_fault+0x59f/0x8a0\n[   39.202937]  ? lock_release+0xd2/0x2a0\n[   39.202939]  ? do_user_addr_fault+0x5a9/0x8a0\n[   39.202942]  ? trace_hardirqs_off+0x4b/0xc0\n[   39.202944]  ? clear_bhb_loop+0x25/0x80\n[   39.202946]  ? clear_bhb_loop+0x25/0x80\n[   39.202947]  ? clear_bhb_loop+0x25/0x80\n[   39.202950]  entry_SYSCALL_64_after_hwframe+0x76/0x7e\n[   39.202952] RIP: 0033:0x7fa945e543e1\n[   39.202961] Code: Unable to access opcode bytes at 0x7fa945e543b7.\n[   39.202962] RSP: 002b:00007ffca8fb4170 EFLAGS: 00000293\n[   39.202963] RAX: 000000000000003d RBX: 0000000000000000 RCX: 00007fa945e543e3\n[   39.202964] RDX: 0000000000000000 RSI: 00007ffca8fb41ac RDI: 00000000ffffffff\n[   39.202964] RBP: 00007ffca8fb4190 R08: 0000000000000000 R09: 00007fa945f600a0\n[   39.202965] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000\n[   39.202966] R13: 00007fa9460dd310 R14: 00007ffca8fb41ac R15: 0000000000000000\n[   39.202970]  </TASK>\n[   39.202970] ---[ end trace ]---\n\n(cherry picked from commit b88f48f86500bc0b44b4f73ac66d500a40d320ad)","publishedAt":"2025-05-01T13:07:03.389Z","updatedAt":"2026-10-15T21:51:59.570Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"332dd0116c82a75df175a459fa69dda3f23491a7","status":"affected","lessThan":"28477f701b63922ff88e9fb13f5519c11cd48b86","versionType":"git"},{"version":"332dd0116c82a75df175a459fa69dda3f23491a7","status":"affected","lessThan":"e4715858f87b78ce58cfa03bbe140321edbbaf20","versionType":"git"},{"version":"332dd0116c82a75df175a459fa69dda3f23491a7","status":"affected","lessThan":"7bcfeddb36b77f9fe3b010bb0b282b7618420bba","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.8","versionType":"semver"},{"version":"6.12.25","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.14.4","status":"unaffected","lessThanOrEqual":"6.14.*","versionType":"semver"},{"version":"6.15","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c"]}],"references":["https://git.kernel.org/stable/c/28477f701b63922ff88e9fb13f5519c11cd48b86","https://git.kernel.org/stable/c/e4715858f87b78ce58cfa03bbe140321edbbaf20","https://git.kernel.org/stable/c/7bcfeddb36b77f9fe3b010bb0b282b7618420bba"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:03.054Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/37xxx/CVE-2025-37761.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-37761","state":"PUBLISHED","datePublished":"2025-05-01T13:07:03.389Z","dateUpdated":"2026-10-15T21:51:59.570Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T04:51:23.938Z"},"containers":{"cna":{"title":"drm/xe: Fix an out-of-bounds shift when invalidating TLB","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe: Fix an out-of-bounds shift when invalidating TLB\n\nWhen the size of the range invalidated is larger than\nrounddown_pow_of_two(ULONG_MAX),\nThe function macro roundup_pow_of_two(length) will hit an out-of-bounds\nshift [1].\n\nUse a full TLB invalidation for such cases.\nv2:\n- Use a define for the range size limit over which we use a full\n  TLB invalidation. (Lucas)\n- Use a better calculation of the limit.\n\n[1]:\n[   39.202421] ------------[ cut here ]------------\n[   39.202657] UBSAN: shift-out-of-bounds in ./include/linux/log2.h:57:13\n[   39.202673] shift exponent 64 is too large for 64-bit type 'long unsigned int'\n[   39.202688] CPU: 8 UID: 0 PID: 3129 Comm: xe_exec_system_ Tainted: G     U             6.14.0+ #10\n[   39.202690] Tainted: [U]=USER\n[   39.202690] Hardware name: ASUS System Product Name/PRIME B560M-A AC, BIOS 2001 02/01/2023\n[   39.202691] Call Trace:\n[   39.202692]  <TASK>\n[   39.202695]  dump_stack_lvl+0x6e/0xa0\n[   39.202699]  ubsan_epilogue+0x5/0x30\n[   39.202701]  __ubsan_handle_shift_out_of_bounds.cold+0x61/0xe6\n[   39.202705]  xe_gt_tlb_invalidation_range.cold+0x1d/0x3a [xe]\n[   39.202800]  ? find_held_lock+0x2b/0x80\n[   39.202803]  ? mark_held_locks+0x40/0x70\n[   39.202806]  xe_svm_invalidate+0x459/0x700 [xe]\n[   39.202897]  drm_gpusvm_notifier_invalidate+0x4d/0x70 [drm_gpusvm]\n[   39.202900]  __mmu_notifier_release+0x1f5/0x270\n[   39.202905]  exit_mmap+0x40e/0x450\n[   39.202912]  __mmput+0x45/0x110\n[   39.202914]  exit_mm+0xc5/0x130\n[   39.202916]  do_exit+0x21c/0x500\n[   39.202918]  ? lockdep_hardirqs_on_prepare+0xdb/0x190\n[   39.202920]  do_group_exit+0x36/0xa0\n[   39.202922]  get_signal+0x8f8/0x900\n[   39.202926]  arch_do_signal_or_restart+0x35/0x100\n[   39.202930]  syscall_exit_to_user_mode+0x1fc/0x290\n[   39.202932]  do_syscall_64+0xa1/0x180\n[   39.202934]  ? do_user_addr_fault+0x59f/0x8a0\n[   39.202937]  ? lock_release+0xd2/0x2a0\n[   39.202939]  ? do_user_addr_fault+0x5a9/0x8a0\n[   39.202942]  ? trace_hardirqs_off+0x4b/0xc0\n[   39.202944]  ? clear_bhb_loop+0x25/0x80\n[   39.202946]  ? clear_bhb_loop+0x25/0x80\n[   39.202947]  ? clear_bhb_loop+0x25/0x80\n[   39.202950]  entry_SYSCALL_64_after_hwframe+0x76/0x7e\n[   39.202952] RIP: 0033:0x7fa945e543e1\n[   39.202961] Code: Unable to access opcode bytes at 0x7fa945e543b7.\n[   39.202962] RSP: 002b:00007ffca8fb4170 EFLAGS: 00000293\n[   39.202963] RAX: 000000000000003d RBX: 0000000000000000 RCX: 00007fa945e543e3\n[   39.202964] RDX: 0000000000000000 RSI: 00007ffca8fb41ac RDI: 00000000ffffffff\n[   39.202964] RBP: 00007ffca8fb4190 R08: 0000000000000000 R09: 00007fa945f600a0\n[   39.202965] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000\n[   39.202966] R13: 00007fa9460dd310 R14: 00007ffca8fb41ac R15: 0000000000000000\n[   39.202970]  </TASK>\n[   39.202970] ---[ end trace ]---\n\n(cherry picked from commit b88f48f86500bc0b44b4f73ac66d500a40d320ad)"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"332dd0116c82a75df175a459fa69dda3f23491a7","status":"affected","lessThan":"28477f701b63922ff88e9fb13f5519c11cd48b86","versionType":"git"},{"version":"332dd0116c82a75df175a459fa69dda3f23491a7","status":"affected","lessThan":"e4715858f87b78ce58cfa03bbe140321edbbaf20","versionType":"git"},{"version":"332dd0116c82a75df175a459fa69dda3f23491a7","status":"affected","lessThan":"7bcfeddb36b77f9fe3b010bb0b282b7618420bba","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.8","versionType":"semver"},{"version":"6.12.25","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.14.4","status":"unaffected","lessThanOrEqual":"6.14.*","versionType":"semver"},{"version":"6.15","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/28477f701b63922ff88e9fb13f5519c11cd48b86"},{"url":"https://git.kernel.org/stable/c/e4715858f87b78ce58cfa03bbe140321edbbaf20"},{"url":"https://git.kernel.org/stable/c/7bcfeddb36b77f9fe3b010bb0b282b7618420bba"}],"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 vulnerability is reached through the local DRM render node `/dev/dri/renderD*` via `DRM_IOCTL_XE_VM_CREATE`/`VM_BIND` and the subsequent mmu-notifier teardown of the calling process's own address space. No network or adjacent-network exposure exists.\nAC:L - The trigger is fully deterministic and requires no race or memory-layout grooming — `mn_itree_release()` always passes `start=0, end=ULONG_MAX`, so simply creating an xe SVM VM, binding a range, and exiting the process hits the out-of-bounds shift 100% of the time (as the reproducer `xe_exec_system_allocator` demonstrates).\nPR:L - All ioctls on the path are `DRM_RENDER_ALLOW` with no capability, DRM-master, or authentication check anywhere in `xe_vm_create_ioctl()`; an ordinary unprivileged local user with render-node access (the default for desktop session users and GPU-passthrough containers) can reach it.\nUI:N - The attacker triggers the bug entirely from their own process — the fatal invalidation is issued by the kernel during that process's own `exit_mmap()`. No victim action of any kind is needed.\nS:U - The vulnerable code and the impacted resources are both within the kernel's own security authority; there is no VM, IOMMU, or sandbox boundary crossed by the defect itself.\nC:H - The undefined shift corrupts the selective-invalidation length/exponent sent to GuC (or skips invalidation entirely), leaving stale GPU TLB translations to page tables torn down at process exit whose pages are immediately recycled, allowing attacker-supplied GPU work to DMA-read arbitrary kernel and other-process memory.\nI:H - The same stale GPU translations are writable, giving attacker-controlled GPU commands an arbitrary DMA write primitive into recycled kernel memory that bypasses the CPU page tables entirely.\nA:H - With x86 shift semantics the `while (start + length < end)` loop overflows `length` to 0 and spins forever with the gpusvm rwsem held write inside an unkillable `do_exit()` path, producing a permanently hung task, blocked mmu-notifier progress on that mm, a leaked address space, and a soft-lockup/RCU-stall CPU spin that any unprivileged user can repeat per-CPU."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-05T11:57:21.427Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.12.25"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.14.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.15"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2025-37761","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-10-15T21:45:04.877416Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-15T21:51:59.570Z"}}]}}}