{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-68757", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-24T10:30:51.033Z", "datePublished": "2026-01-05T09:32:30.496Z", "dateUpdated": "2026-05-11T21:52:45.833Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T21:52:45.833Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vgem-fence: Fix potential deadlock on release\n\nA timer that expires a vgem fence automatically in 10 seconds is now\nreleased with timer_delete_sync() from fence->ops.release() called on last\ndma_fence_put(). In some scenarios, it can run in IRQ context, which is\nnot safe unless TIMER_IRQSAFE is used. One potentially risky scenario was\ndemonstrated in Intel DRM CI trybot, BAT run on machine bat-adlp-6, while\nworking on new IGT subtests syncobj_timeline@stress-* as user space\nreplacements of some problematic test cases of a dma-fence-chain selftest\n[1].\n\n[117.004338] ================================\n[117.004340] WARNING: inconsistent lock state\n[117.004342] 6.17.0-rc7-CI_DRM_17270-g7644974e648c+ #1 Tainted: G S U\n[117.004346] --------------------------------\n[117.004347] inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage.\n[117.004349] swapper/0/0 [HC1[1]:SC1[1]:HE0:SE0] takes:\n[117.004352] ffff888138f86aa8 ((&fence->timer)){?.-.}-{0:0}, at: __timer_delete_sync+0x4b/0x190\n[117.004361] {HARDIRQ-ON-W} state was registered at:\n[117.004363] lock_acquire+0xc4/0x2e0\n[117.004366] call_timer_fn+0x80/0x2a0\n[117.004368] __run_timers+0x231/0x310\n[117.004370] run_timer_softirq+0x76/0xe0\n[117.004372] handle_softirqs+0xd4/0x4d0\n[117.004375] __irq_exit_rcu+0x13f/0x160\n[117.004377] irq_exit_rcu+0xe/0x20\n[117.004379] sysvec_apic_timer_interrupt+0xa0/0xc0\n[117.004382] asm_sysvec_apic_timer_interrupt+0x1b/0x20\n[117.004385] cpuidle_enter_state+0x12b/0x8a0\n[117.004388] cpuidle_enter+0x2e/0x50\n[117.004393] call_cpuidle+0x22/0x60\n[117.004395] do_idle+0x1fd/0x260\n[117.004398] cpu_startup_entry+0x29/0x30\n[117.004401] start_secondary+0x12d/0x160\n[117.004404] common_startup_64+0x13e/0x141\n[117.004407] irq event stamp: 2282669\n[117.004409] hardirqs last enabled at (2282668): [] _raw_spin_unlock_irqrestore+0x51/0x80\n[117.004414] hardirqs last disabled at (2282669): [] sysvec_irq_work+0x11/0xc0\n[117.004419] softirqs last enabled at (2254702): [] __do_softirq+0x10/0x18\n[117.004423] softirqs last disabled at (2254725): [] __irq_exit_rcu+0x13f/0x160\n[117.004426]\nother info that might help us debug this:\n[117.004429] Possible unsafe locking scenario:\n[117.004432] CPU0\n[117.004433] ----\n[117.004434] lock((&fence->timer));\n[117.004436] \n[117.004438] lock((&fence->timer));\n[117.004440]\n *** DEADLOCK ***\n[117.004443] 1 lock held by swapper/0/0:\n[117.004445] #0: ffffc90000003d50 ((&fence->timer)){?.-.}-{0:0}, at: call_timer_fn+0x7a/0x2a0\n[117.004450]\nstack backtrace:\n[117.004453] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G S U 6.17.0-rc7-CI_DRM_17270-g7644974e648c+ #1 PREEMPT(voluntary)\n[117.004455] Tainted: [S]=CPU_OUT_OF_SPEC, [U]=USER\n[117.004455] Hardware name: Intel Corporation Alder Lake Client Platform/AlderLake-P DDR4 RVP, BIOS RPLPFWI1.R00.4035.A00.2301200723 01/20/2023\n[117.004456] Call Trace:\n[117.004456] \n[117.004457] dump_stack_lvl+0x91/0xf0\n[117.004460] dump_stack+0x10/0x20\n[117.004461] print_usage_bug.part.0+0x260/0x360\n[117.004463] mark_lock+0x76e/0x9c0\n[117.004465] ? register_lock_class+0x48/0x4a0\n[117.004467] __lock_acquire+0xbc3/0x2860\n[117.004469] lock_acquire+0xc4/0x2e0\n[117.004470] ? __timer_delete_sync+0x4b/0x190\n[117.004472] ? __timer_delete_sync+0x4b/0x190\n[117.004473] __timer_delete_sync+0x68/0x190\n[117.004474] ? __timer_delete_sync+0x4b/0x190\n[117.004475] timer_delete_sync+0x10/0x20\n[117.004476] vgem_fence_release+0x19/0x30 [vgem]\n[117.004478] dma_fence_release+0xc1/0x3b0\n[117.004480] ? dma_fence_release+0xa1/0x3b0\n[117.004481] dma_fence_chain_release+0xe7/0x130\n[117.004483] dma_fence_release+0xc1/0x3b0\n[117.004484] ? _raw_spin_unlock_irqrestore+0x27/0x80\n[117.004485] dma_fence_chain_irq_work+0x59/0x80\n[117.004487] irq_work_single+0x75/0xa0\n[117.004490] irq_work_r\n---truncated---" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/gpu/drm/vgem/vgem_fence.c" ], "versions": [ { "version": "4077798484459a2eced2050045099a466ecb618a", "lessThan": "37289a18099fc7ce916933bd542926a7334791a3", "status": "affected", "versionType": "git" }, { "version": "4077798484459a2eced2050045099a466ecb618a", "lessThan": "489b2158aec92a3fc256d70992416869f86e16e0", "status": "affected", "versionType": "git" }, { "version": "4077798484459a2eced2050045099a466ecb618a", "lessThan": "1026d1b0bd55e1be7ba0f9e9b1c9f6e02448f25a", "status": "affected", "versionType": "git" }, { "version": "4077798484459a2eced2050045099a466ecb618a", "lessThan": "9dc3c78d21e16f5af1a9c3d11b4bd5276f891fe0", "status": "affected", "versionType": "git" }, { "version": "4077798484459a2eced2050045099a466ecb618a", "lessThan": "338e388c0d80ffc04963b6b0ec702ffdfd2c4eba", "status": "affected", "versionType": "git" }, { "version": "4077798484459a2eced2050045099a466ecb618a", "lessThan": "4f335cb8fad69b2be5accf0ebac3a8b345915f4e", "status": "affected", "versionType": "git" }, { "version": "4077798484459a2eced2050045099a466ecb618a", "lessThan": "1f0ca9d3e7c38a39f1f12377c24decf0bba46e54", "status": "affected", "versionType": "git" }, { "version": "4077798484459a2eced2050045099a466ecb618a", "lessThan": "78b4d6463e9e69e5103f98b367f8984ad12cdc6f", "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/vgem/vgem_fence.c" ], "versions": [ { "version": "4.8", "status": "affected" }, { "version": "0", "lessThan": "4.8", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.248", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.198", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.160", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.120", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.63", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.17.13", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.2", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19", "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": "4.8", "versionEndExcluding": "5.10.248" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "5.15.198" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.1.160" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.6.120" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.12.63" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.17.13" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.18.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.19" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/37289a18099fc7ce916933bd542926a7334791a3" }, { "url": "https://git.kernel.org/stable/c/489b2158aec92a3fc256d70992416869f86e16e0" }, { "url": "https://git.kernel.org/stable/c/1026d1b0bd55e1be7ba0f9e9b1c9f6e02448f25a" }, { "url": "https://git.kernel.org/stable/c/9dc3c78d21e16f5af1a9c3d11b4bd5276f891fe0" }, { "url": "https://git.kernel.org/stable/c/338e388c0d80ffc04963b6b0ec702ffdfd2c4eba" }, { "url": "https://git.kernel.org/stable/c/4f335cb8fad69b2be5accf0ebac3a8b345915f4e" }, { "url": "https://git.kernel.org/stable/c/1f0ca9d3e7c38a39f1f12377c24decf0bba46e54" }, { "url": "https://git.kernel.org/stable/c/78b4d6463e9e69e5103f98b367f8984ad12cdc6f" } ], "title": "drm/vgem-fence: Fix potential deadlock on release", "x_generator": { "engine": "bippy-1.2.0" } } } }