What’s Vulnerable › Vulnerabilities

CVE-2026-68327: wan: wanxl: Only reset hardware after BAR mapping

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-10 · updated 2026-08-19

Description

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 products

• Linux kernel: 2.6.12 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2fe22d58b3797d741570f9873b26653fd511576c
• https://git.kernel.org/stable/c/3d9617d856ebddcdddbab0ce877c397420f59f55
• https://git.kernel.org/stable/c/59cbe6cfa0fa23c192351cc284e30707309f6741
• https://git.kernel.org/stable/c/897e289db1e4d00ca6419cfe733c646492147270
• https://git.kernel.org/stable/c/91957b89da995607cb654b1f9a3c126ddbaee10f
• https://git.kernel.org/stable/c/b9e2ff70e96acf83693b27987e0390bad9f83efa
• https://git.kernel.org/stable/c/ef394eeb9d5ec6db8d979eec6d27f56c2ebc6523
• https://git.kernel.org/stable/c/f4834132773f15ffb255127499c8443947fa7d0f

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