Linux Kernel up to 7.2-rc4 wanxl drivers/net/wan/wanxl.c wanxl_pci_remove_one plx null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k2.68-

Summaryinfo

A vulnerability labeled as problematic has been found in Linux Kernel up to 6.6.147/6.12.100/6.18.41/7.1.5/7.2-rc4. This vulnerability affects the function wanxl_pci_remove_one of the file drivers/net/wan/wanxl.c of the component wanxl. Such manipulation of the argument plx leads to null pointer dereference. This vulnerability is listed as CVE-2026-68327. The attack must be carried out locally. There is no available exploit.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.6.147/6.12.100/6.18.41/7.1.5/7.2-rc4 and classified as problematic. Affected by this issue is the function wanxl_pci_remove_one of the file drivers/net/wan/wanxl.c of the component wanxl. The manipulation of the argument plx with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. CVE summarizes:

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.

The advisory is available at git.kernel.org. This vulnerability is handled as CVE-2026-68327 since 07/30/2026. The exploitation is known to be easy. Local access is required to approach this attack. Additional levels of successful authentication are necessary for exploitation. Technical details are known, but there is no available exploit.

Upgrading to version 6.6.148, 6.12.101, 6.18.42, 7.1.6 or 7.2-rc5 eliminates this vulnerability. Applying the patch f4834132773f15ffb255127499c8443947fa7d0f/b9e2ff70e96acf83693b27987e0390bad9f83efa/59cbe6cfa0fa23c192351cc284e30707309f6741/2fe22d58b3797d741570f9873b26653fd511576c/91957b89da995607cb654b1f9a3c126ddbaee10f is able to eliminate this problem.

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Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.4
VulDB Temp Score: 4.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.6.148/6.12.101/6.18.42/7.1.6/7.2-rc5
Patch: f4834132773f15ffb255127499c8443947fa7d0f/b9e2ff70e96acf83693b27987e0390bad9f83efa/59cbe6cfa0fa23c192351cc284e30707309f6741/2fe22d58b3797d741570f9873b26653fd511576c/91957b89da995607cb654b1f9a3c126ddbaee10f

Timelineinfo

07/30/2026 CVE reserved
08/10/2026 +11 days Advisory disclosed
08/10/2026 +0 days VulDB entry created
08/10/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-68327 (🔒)
GCVE (CVE): GCVE-0-2026-68327
GCVE (VulDB): GCVE-100-387698

Entryinfo

Created: 08/10/2026 17:47
Changes: 08/10/2026 17:47 (61)
Complete: 🔍
Cache ID: 216::103

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