{"id":"CVE-2026-64254","summary":"NTB: epf: Avoid pci_iounmap() with offset when PEER_SPAD and CONFIG share BAR","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nNTB: epf: Avoid pci_iounmap() with offset when PEER_SPAD and CONFIG share BAR\n\nWhen BAR_PEER_SPAD and BAR_CONFIG share one PCI BAR, the module teardown\npath ends up calling pci_iounmap() on the same iomem with some offset,\nwhich is unnecessary and triggers a kernel warning like the following:\n\n  Trying to vunmap() nonexistent vm area (0000000069a5ffe8)\n  WARNING: mm/vmalloc.c:3470 at vunmap+0x58/0x68, CPU#5: modprobe/2937\n  [...]\n  Call trace:\n   vunmap+0x58/0x68 (P)\n   iounmap+0x34/0x48\n   pci_iounmap+0x2c/0x40\n   ntb_epf_pci_remove+0x44/0x80 [ntb_hw_epf]\n   pci_device_remove+0x48/0xf8\n   device_remove+0x50/0x88\n   device_release_driver_internal+0x1c8/0x228\n   driver_detach+0x50/0xb0\n   bus_remove_driver+0x74/0x100\n   driver_unregister+0x34/0x68\n   pci_unregister_driver+0x34/0xa0\n   ntb_epf_pci_driver_exit+0x14/0xfe0 [ntb_hw_epf]\n  [...]\n\nFix it by unmapping only when PEER_SPAD and CONFIG use difference bars.","modified":"2026-08-18T03:31:17.634294193Z","published":"2026-07-24T15:31:22.293Z","related":["openSUSE-SU-2026:11476-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64254.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/06f6dd2ff2bd07eaf7178a807407ff27e85122b4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/81371dbd23601f67f01372817fdbab42c5601e43"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9764a786ba98db58f0725913c369e721253aba33"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a4be4a1308f02bff79a30eea2d04ead5b63685f2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d876153680e3d721d385e554def919bce3d18c74"},{"type":"WEB","url":"https://git.kernel.org/stable/c/eb47b9bffd07a47b84910847cb5ea066ce184055"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64254.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64254"},{"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":"e75d5ae8ab88b7ffb3d1d56124b003f3555f74b4"},{"fixed":"eb47b9bffd07a47b84910847cb5ea066ce184055"},{"fixed":"06f6dd2ff2bd07eaf7178a807407ff27e85122b4"},{"fixed":"a4be4a1308f02bff79a30eea2d04ead5b63685f2"},{"fixed":"81371dbd23601f67f01372817fdbab42c5601e43"},{"fixed":"9764a786ba98db58f0725913c369e721253aba33"},{"fixed":"d876153680e3d721d385e554def919bce3d18c74"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-64254.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.0.0"},{"fixed":"6.1.177"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.144"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.95"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.38"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.3"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-64254.json"}}],"schema_version":"1.9.0"}