CVE-2026-68327

Summary

In the Linux kernel, the following vulnerability has been resolved:

wan: wanxl: Only reset hardware after BAR mapping

wanxl_pci_init_one() stores the freshly allocated card in driver data before the PLX BAR is mapped. Several early probe failures then unwind through wanxl_pci_remove_one(), including failure to allocate the coherent status area or to restore the DMA mask.

wanxl_pci_remove_one() unconditionally calls wanxl_reset(), and wanxl_reset() dereferences card->plx. On those early failures card->plx is still NULL, so the error path can dereference a NULL MMIO pointer.

Only issue the hardware reset once the BAR mapping exists. The remaining cleanup in wanxl_pci_remove_one() already checks whether later resources were allocated.

This issue was found by a static analysis checker and confirmed by manual source review.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < f4834132773f15ffb255127499c8443947fa7d0faffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b9e2ff70e96acf83693b27987e0390bad9f83efaaffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 59cbe6cfa0fa23c192351cc284e30707309f6741affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2fe22d58b3797d741570f9873b26653fd511576caffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 91957b89da995607cb654b1f9a3c126ddbaee10faffected
LinuxLinux2.6.12affected
LinuxLinux0 < 2.6.12unaffected
LinuxLinux6.6.148 <= 6.6.*unaffected
LinuxLinux6.12.101 <= 6.12.*unaffected
LinuxLinux6.18.42 <= 6.18.*unaffected
LinuxLinux7.1.6 <= 7.1.*unaffected
LinuxLinux7.2-rc5 <= *unaffected

Weaknesses

References