CVE-2026-64254

MediumCVSS 5.5/10Last modified Nov 8, 2026

Description

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.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-617

Affected software

VendorProductVersions
LinuxLinux>= e75d5ae8ab88b7ffb3d1d56124b003f3555f74b4, < eb47b9bffd07a47b84910847cb5ea066ce184055; >= e75d5ae8ab88b7ffb3d1d56124b003f3555f74b4, < 06f6dd2ff2bd07eaf7178a807407ff27e85122b4; >= e75d5ae8ab88b7ffb3d1d56124b003f3555f74b4, < a4be4a1308f02bff79a30eea2d04ead5b63685f2; >= e75d5ae8ab88b7ffb3d1d56124b003f3555f74b4, < 81371dbd23601f67f01372817fdbab42c5601e43; >= e75d5ae8ab88b7ffb3d1d56124b003f3555f74b4, < 9764a786ba98db58f0725913c369e721253aba33; >= e75d5ae8ab88b7ffb3d1d56124b003f3555f74b4, < d876153680e3d721d385e554def919bce3d18c74
LinuxLinux6.0

References

Timeline

Published
Jul 24, 2026
Last modified
Nov 8, 2026
NVD status
Analyzed

Related CVEs from 2026

CVE-2026-642558.8In the Linux kernel, the following vulnerability has been resolved: wifi: iwlwifi: mld: validate sta_mask before ffs() in BA session handleCVE-2026-642565.5In the Linux kernel, the following vulnerability has been resolved: xfs: don't wrap around quota ids in dqiterate LOLLM noticed that q_id CVE-2026-642579.1In the Linux kernel, the following vulnerability has been resolved: smb: client: reject overlapping data areas in SMB2 responses Commit 53CVE-2026-642585.5In the Linux kernel, the following vulnerability has been resolved: fuse-uring: remove request-less entries from ent_w_req_queue to fix NULCVE-2026-642597.8In the Linux kernel, the following vulnerability has been resolved: fuse-uring: make a fuse_req on SQE commit only findable after memcpy BCVE-2026-64264.4A type mismatch vulnerability was found in QEMU's vhost inflight migration VMState handling. The destination buffer size is stored as a uintCVE-2026-642607.8In the Linux kernel, the following vulnerability has been resolved: fuse-uring: Avoid queue->stopped races and set/read that value under loCVE-2026-642617.8In the Linux kernel, the following vulnerability has been resolved: fuse-uring: Avoid use-after-free in fuse_uring_async_stop_queues fuse_CVE-2026-642625.5In the Linux kernel, the following vulnerability has been resolved: fuse-uring: end fuse_req on io-uring cancel task work When io_uring deCVE-2026-642635.5In the Linux kernel, the following vulnerability has been resolved: fuse-uring: fix moving cancelled entry to ent_in_userspace list fuse_uCVE-2026-642645.5In the Linux kernel, the following vulnerability has been resolved: fuse-uring: fix EFAULT clobber in fuse_uring_commit copy_from_user() rCVE-2026-642657.8In the Linux kernel, the following vulnerability has been resolved: fuse: clear intr_entry in fuse_resend and fuse_remove_pending_req When
CVE-2026-64254: Medium severity, CVSS 5.5 | Vulnix