{"id":"CVE-2024-41096","summary":"PCI/MSI: Fix UAF in msi_capability_init","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nPCI/MSI: Fix UAF in msi_capability_init\n\nKFENCE reports the following UAF:\n\n BUG: KFENCE: use-after-free read in __pci_enable_msi_range+0x2c0/0x488\n\n Use-after-free read at 0x0000000024629571 (in kfence-#12):\n  __pci_enable_msi_range+0x2c0/0x488\n  pci_alloc_irq_vectors_affinity+0xec/0x14c\n  pci_alloc_irq_vectors+0x18/0x28\n\n kfence-#12: 0x0000000008614900-0x00000000e06c228d, size=104, cache=kmalloc-128\n\n allocated by task 81 on cpu 7 at 10.808142s:\n  __kmem_cache_alloc_node+0x1f0/0x2bc\n  kmalloc_trace+0x44/0x138\n  msi_alloc_desc+0x3c/0x9c\n  msi_domain_insert_msi_desc+0x30/0x78\n  msi_setup_msi_desc+0x13c/0x184\n  __pci_enable_msi_range+0x258/0x488\n  pci_alloc_irq_vectors_affinity+0xec/0x14c\n  pci_alloc_irq_vectors+0x18/0x28\n\n freed by task 81 on cpu 7 at 10.811436s:\n  msi_domain_free_descs+0xd4/0x10c\n  msi_domain_free_locked.part.0+0xc0/0x1d8\n  msi_domain_alloc_irqs_all_locked+0xb4/0xbc\n  pci_msi_setup_msi_irqs+0x30/0x4c\n  __pci_enable_msi_range+0x2a8/0x488\n  pci_alloc_irq_vectors_affinity+0xec/0x14c\n  pci_alloc_irq_vectors+0x18/0x28\n\nDescriptor allocation done in:\n__pci_enable_msi_range\n    msi_capability_init\n        msi_setup_msi_desc\n            msi_insert_msi_desc\n                msi_domain_insert_msi_desc\n                    msi_alloc_desc\n                        ...\n\nFreed in case of failure in __msi_domain_alloc_locked()\n__pci_enable_msi_range\n    msi_capability_init\n        pci_msi_setup_msi_irqs\n            msi_domain_alloc_irqs_all_locked\n                msi_domain_alloc_locked\n                    __msi_domain_alloc_locked =\u003e fails\n                    msi_domain_free_locked\n                        ...\n\nThat failure propagates back to pci_msi_setup_msi_irqs() in\nmsi_capability_init() which accesses the descriptor for unmasking in the\nerror exit path.\n\nCure it by copying the descriptor and using the copy for the error exit path\nunmask operation.\n\n[ tglx: Massaged change log ]","modified":"2026-03-20T12:37:31.484985Z","published":"2024-07-29T15:48:09.247Z","related":["ALSA-2024:6567","SUSE-SU-2024:3194-1","SUSE-SU-2024:3195-1","SUSE-SU-2024:3383-1","SUSE-SU-2025:20044-1","SUSE-SU-2025:20047-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/41xxx/CVE-2024-41096.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0ae40b2d0a5de6b045504098e365d4fdff5bbeba"},{"type":"WEB","url":"https://git.kernel.org/stable/c/45fc8d20e0768ab0a0ad054081d0f68aa3c83976"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9eee5330656bf92f51cb1f09b2dc9f8cf975b3d1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ff1121d2214b794dc1772081f27bdd90721a84bc"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/41xxx/CVE-2024-41096.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-41096"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"bf6e054e0e3fbc9614355b760e18c8a14f952a4e"},{"fixed":"0ae40b2d0a5de6b045504098e365d4fdff5bbeba"},{"fixed":"ff1121d2214b794dc1772081f27bdd90721a84bc"},{"fixed":"45fc8d20e0768ab0a0ad054081d0f68aa3c83976"},{"fixed":"9eee5330656bf92f51cb1f09b2dc9f8cf975b3d1"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-41096.json"}}],"schema_version":"1.7.5"}