{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2025-38104", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-38104", "idYear": 2025, "status": "PUBLISHED", "publishedAt": "2025-04-18T07:01:31.091Z", "updatedAt": "2026-05-23T15:59:00.272Z", "importedAt": "2026-10-24T01:57:34.152Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "drm/amdgpu: Replace Mutex with Spinlock for RLCG register access to avoid Priority Inversion in SRIOV", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: Replace Mutex with Spinlock for RLCG register access to avoid Priority Inversion in SRIOV\n\nRLCG Register Access is a way for virtual functions to safely access GPU\nregisters in a virtualized environment., including TLB flushes and\nregister reads. When multiple threads or VFs try to access the same\nregisters simultaneously, it can lead to race conditions. By using the\nRLCG interface, the driver can serialize access to the registers. This\nmeans that only one thread can access the registers at a time,\npreventing conflicts and ensuring that operations are performed\ncorrectly. Additionally, when a low-priority task holds a mutex that a\nhigh-priority task needs, ie., If a thread holding a spinlock tries to\nacquire a mutex, it can lead to priority inversion. register access in\namdgpu_virt_rlcg_reg_rw especially in a fast code path is critical.\n\nThe call stack shows that the function amdgpu_virt_rlcg_reg_rw is being\ncalled, which attempts to acquire the mutex. This function is invoked\nfrom amdgpu_sriov_wreg, which in turn is called from\ngmc_v11_0_flush_gpu_tlb.\n\nThe [ BUG: Invalid wait context ] indicates that a thread is trying to\nacquire a mutex while it is in a context that does not allow it to sleep\n(like holding a spinlock).\n\nFixes the below:\n\n[ 253.013423] =============================\n[ 253.013434] [ BUG: Invalid wait context ]\n[ 253.013446] 6.12.0-amdstaging-drm-next-lol-050225 #14 Tainted: G U OE\n[ 253.013464] -----------------------------\n[ 253.013475] kworker/0:1/10 is trying to lock:\n[ 253.013487] ffff9f30542e3cf8 (&adev->virt.rlcg_reg_lock){+.+.}-{3:3}, at: amdgpu_virt_rlcg_reg_rw+0xf6/0x330 [amdgpu]\n[ 253.013815] other info that might help us debug this:\n[ 253.013827] context-{4:4}\n[ 253.013835] 3 locks held by kworker/0:1/10:\n[ 253.013847] #0: ffff9f3040050f58 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x3f5/0x680\n[ 253.013877] #1: ffffb789c008be40 ((work_completion)(&wfc.work)){+.+.}-{0:0}, at: process_one_work+0x1d6/0x680\n[ 253.013905] #2: ffff9f3054281838 (&adev->gmc.invalidate_lock){+.+.}-{2:2}, at: gmc_v11_0_flush_gpu_tlb+0x198/0x4f0 [amdgpu]\n[ 253.014154] stack backtrace:\n[ 253.014164] CPU: 0 UID: 0 PID: 10 Comm: kworker/0:1 Tainted: G U OE 6.12.0-amdstaging-drm-next-lol-050225 #14\n[ 253.014189] Tainted: [U]=USER, [O]=OOT_MODULE, [E]=UNSIGNED_MODULE\n[ 253.014203] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 11/18/2024\n[ 253.014224] Workqueue: events work_for_cpu_fn\n[ 253.014241] Call Trace:\n[ 253.014250] \n[ 253.014260] dump_stack_lvl+0x9b/0xf0\n[ 253.014275] dump_stack+0x10/0x20\n[ 253.014287] __lock_acquire+0xa47/0x2810\n[ 253.014303] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 253.014321] lock_acquire+0xd1/0x300\n[ 253.014333] ? amdgpu_virt_rlcg_reg_rw+0xf6/0x330 [amdgpu]\n[ 253.014562] ? __lock_acquire+0xa6b/0x2810\n[ 253.014578] __mutex_lock+0x85/0xe20\n[ 253.014591] ? amdgpu_virt_rlcg_reg_rw+0xf6/0x330 [amdgpu]\n[ 253.014782] ? sched_clock_noinstr+0x9/0x10\n[ 253.014795] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 253.014808] ? local_clock_noinstr+0xe/0xc0\n[ 253.014822] ? amdgpu_virt_rlcg_reg_rw+0xf6/0x330 [amdgpu]\n[ 253.015012] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 253.015029] mutex_lock_nested+0x1b/0x30\n[ 253.015044] ? mutex_lock_nested+0x1b/0x30\n[ 253.015057] amdgpu_virt_rlcg_reg_rw+0xf6/0x330 [amdgpu]\n[ 253.015249] amdgpu_sriov_wreg+0xc5/0xd0 [amdgpu]\n[ 253.015435] gmc_v11_0_flush_gpu_tlb+0x44b/0x4f0 [amdgpu]\n[ 253.015667] gfx_v11_0_hw_init+0x499/0x29c0 [amdgpu]\n[ 253.015901] ? __pfx_smu_v13_0_update_pcie_parameters+0x10/0x10 [amdgpu]\n[ 253.016159] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 253.016173] ? smu_hw_init+0x18d/0x300 [amdgpu]\n[ 253.016403] amdgpu_device_init+0x29ad/0x36a0 [amdgpu]\n[ 253.016614] amdgpu_driver_load_kms+0x1a/0xc0 [amdgpu]\n[ 253.0170\n---truncated---", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "f39a3bc42815a7016a915f6cb35e9a1448788f06", "status": "affected", "versionType": "git", "lessThan": "dd450b513718dfeb4c637c9335d51a55ebcd4320" }, { "version": "1adb5ebe205e96af77a93512e2d5b8c437548787", "status": "affected", "versionType": "git", "lessThan": "d1bda2ab0cf956a16dd369a473a6c43dfbed5855" }, { "version": "e864180ee49b4d30e640fd1e1d852b86411420c9", "status": "affected", "versionType": "git", "lessThan": "07ed75bfa7ede8bfcfa303fd6efc85db1c8684c7" }, { "version": "e864180ee49b4d30e640fd1e1d852b86411420c9", "status": "affected", "versionType": "git", "lessThan": "1c0378830e42c98acd69e0289882c8637d92f285" }, { "version": "e864180ee49b4d30e640fd1e1d852b86411420c9", "status": "affected", "versionType": "git", "lessThan": "5c1741a0c176ae11675a64cb7f2dd21d72db6b91" }, { "version": "e864180ee49b4d30e640fd1e1d852b86411420c9", "status": "affected", "versionType": "git", "lessThan": "dc0297f3198bd60108ccbd167ee5d9fa4af31ed0" }, { "version": "e1ab38e99d1607f80a1670a399511a56464c0253", "status": "affected", "versionType": "git" }, { "version": "6.1.105", "status": "affected", "versionType": "semver", "lessThan": "6.1.162" }, { "version": "6.6.46", "status": "affected", "versionType": "semver", "lessThan": "6.6.123" }, { "version": "6.10.5", "status": "affected", "versionType": "semver", "lessThan": "6.11" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "6.11", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "6.11" }, { "version": "6.1.162", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.123", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.39", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.13.11", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.13.*" }, { "version": "6.14.2", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.14.*" }, { "version": "6.15", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }