CVE-2026-68327 wan: wanxl: Only reset hardware after BAR mapping
A null pointer dereference in the Linux kernel WAN XL driver during early probe failures can cause a system crash, requiring a kernel patch.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-68327?
CVE-2026-68327 is a vulnerability in Linux, published on 10 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-68327?
How do I fix CVE-2026-68327?
Apply the vendor's patch.
Is CVE-2026-68327 being exploited?
There is no known exploitation of CVE-2026-68327 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-68327, DEBIAN-CVE-2026-68327, GHSA-hgpj-pm42-vw5v, UBUNTU-CVE-2026-68327.