wan: wanxl: Only reset hardware after BAR mapping
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
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.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
2.6.12
References 8
git.kernel.org
- stable/c/ef394eeb9d5ec6db8d979eec6d27f56c2ebc6523
- stable/c/3d9617d856ebddcdddbab0ce877c397420f59f55
- stable/c/897e289db1e4d00ca6419cfe733c646492147270
- stable/c/f4834132773f15ffb255127499c8443947fa7d0f
- stable/c/b9e2ff70e96acf83693b27987e0390bad9f83efa
- stable/c/59cbe6cfa0fa23c192351cc284e30707309f6741
- stable/c/2fe22d58b3797d741570f9873b26653fd511576c
- stable/c/91957b89da995607cb654b1f9a3c126ddbaee10f