{"id":"CVE-2021-47005","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: endpoint: Fix NULL pointer dereference for -\u003eget_features()\n\nget_features ops of pci_epc_ops may return NULL, causing NULL pointer\ndereference in pci_epf_test_alloc_space function. Let us add a check for\npci_epc_feature pointer in pci_epf_test_bind before we access it to avoid\nany such NULL pointer dereference and return -ENOTSUPP in case\npci_epc_feature is not found.\n\nWhen the patch is not applied and EPC features is not implemented in the\nplatform driver, we see the following dump due to kernel NULL pointer\ndereference.\n\nCall trace:\n pci_epf_test_bind+0xf4/0x388\n pci_epf_bind+0x3c/0x80\n pci_epc_epf_link+0xa8/0xcc\n configfs_symlink+0x1a4/0x48c\n vfs_symlink+0x104/0x184\n do_symlinkat+0x80/0xd4\n __arm64_sys_symlinkat+0x1c/0x24\n el0_svc_common.constprop.3+0xb8/0x170\n el0_svc_handler+0x70/0x88\n el0_svc+0x8/0x640\nCode: d2800581 b9403ab9 f9404ebb 8b394f60 (f9400400)\n---[ end trace a438e3c5a24f9df0 ]---","modified":"2026-03-13T05:20:26.536846Z","published":"2024-02-28T09:15:38.403Z","related":["SUSE-SU-2024:0856-1","SUSE-SU-2024:0857-1","SUSE-SU-2024:0926-1"],"references":[{"type":"FIX","url":"https://git.kernel.org/stable/c/0169d4f0bee44fdfef908c13ed21fcb326c38695"},{"type":"FIX","url":"https://git.kernel.org/stable/c/6613bc2301ba291a1c5a90e1dc24cf3edf223c03"},{"type":"FIX","url":"https://git.kernel.org/stable/c/679ebad058b8168f10e63876d63b0877fd2fe784"},{"type":"FIX","url":"https://git.kernel.org/stable/c/bbed83d7060e07a5d309104d25a00f0a24441428"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-47005.json","unresolved_ranges":[{"events":[{"introduced":"5.1"},{"fixed":"5.10.38"}]},{"events":[{"introduced":"5.11"},{"fixed":"5.11.22"}]},{"events":[{"introduced":"5.12"},{"fixed":"5.12.5"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}