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CVE-2026-64254

NTB: epf: Avoid pci_iounmap() with offset when PEER_SPAD and CONFIG share BAR PUBLISHED

Description (CNA)

In the Linux kernel, the following vulnerability has been resolved: NTB: epf: Avoid pci_iounmap() with offset when PEER_SPAD and CONFIG share BAR When BAR_PEER_SPAD and BAR_CONFIG share one PCI BAR, the module teardown path ends up calling pci_iounmap() on the same iomem with some offset, which is unnecessary and triggers a kernel warning like the following: Trying to vunmap() nonexistent vm area (0000000069a5ffe8) WARNING: mm/vmalloc.c:3470 at vunmap+0x58/0x68, CPU#5: modprobe/2937 [...] Call trace: vunmap+0x58/0x68 (P) iounmap+0x34/0x48 pci_iounmap+0x2c/0x40 ntb_epf_pci_remove+0x44/0x80 [ntb_hw_epf] pci_device_remove+0x48/0xf8 device_remove+0x50/0x88 device_release_driver_internal+0x1c8/0x228 driver_detach+0x50/0xb0 bus_remove_driver+0x74/0x100 driver_unregister+0x34/0x68 pci_unregister_driver+0x34/0xa0 ntb_epf_pci_driver_exit+0x14/0xfe0 [ntb_hw_epf] [...] Fix it by unmapping only when PEER_SPAD and CONFIG use difference bars.

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected e75d5ae8ab88b7ffb3d1d56124b003f3555f74b4 before eb47b9bffd07a47b84910847cb5ea066ce184055; affected e75d5ae8ab88b7ffb3d1d56124b003f3555f74b4 before 06f6dd2ff2bd07eaf7178a807407ff27e85122b4; affected e75d5ae8ab88b7ffb3d1d56124b003f3555f74b4 before a4be4a1308f02bff79a30eea2d04ead5b63685f2; affected e75d5ae8ab88b7ffb3d1d56124b003f3555f74b4 before 81371dbd23601f67f01372817fdbab42c5601e43; affected e75d5ae8ab88b7ffb3d1d56124b003f3555f74b4 before 9764a786ba98db58f0725913c369e721253aba33; affected e75d5ae8ab88b7ffb3d1d56124b003f3555f74b4 before d876153680e3d721d385e554def919bce3d18c74
Linux / Linuxaffected 6.0; unaffected 0 before 6.0; unaffected 6.1.177 through 6.1.*; unaffected 6.6.144 through 6.6.*; unaffected 6.12.95 through 6.12.*; unaffected 6.18.38 through 6.18.*; unaffected 7.1.3 through 7.1.*; unaffected 7.2 through *

CWE

No CWE identifiers supplied.

References