CVE-2024-40945

Summary

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

iommu: Return right value in iommu_sva_bind_device()

iommu_sva_bind_device() should return either a sva bond handle or an ERR_PTR value in error cases. Existing drivers (idxd and uacce) only check the return value with IS_ERR(). This could potentially lead to a kernel NULL pointer dereference issue if the function returns NULL instead of an error pointer.

In reality, this doesn't cause any problems because iommu_sva_bind_device() only returns NULL when the kernel is not configured with CONFIG_IOMMU_SVA. In this case, iommu_dev_enable_feature(dev, IOMMU_DEV_FEAT_SVA) will return an error, and the device drivers won't call iommu_sva_bind_device() at all.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux26b25a2b98e45aeb40eedcedc586ad5034cbd984 < 700f564758882db7c039dfba9443fe762561a3f8affected
LinuxLinux26b25a2b98e45aeb40eedcedc586ad5034cbd984 < cf34f8f66982a36e5cba0d05781b21ec9606b91eaffected
LinuxLinux26b25a2b98e45aeb40eedcedc586ad5034cbd984 < 2973b8e7d127754de9013177c41c0b5547406998affected
LinuxLinux26b25a2b98e45aeb40eedcedc586ad5034cbd984 < 6325eab6c108fed27f60ff51852e3eac0ba23f3faffected
LinuxLinux26b25a2b98e45aeb40eedcedc586ad5034cbd984 < 7388ae6f26c0ba95f70cc96bf9c5d5cb06c908b6affected
LinuxLinux26b25a2b98e45aeb40eedcedc586ad5034cbd984 < 61a96da9649a6b6a1a5d5bde9374b045fdb5c12eaffected
LinuxLinux26b25a2b98e45aeb40eedcedc586ad5034cbd984 < 89e8a2366e3bce584b6c01549d5019c5cda1205eaffected
LinuxLinux5.2affected
LinuxLinux0 < 5.2unaffected
LinuxLinux5.4.279 <= 5.4.*unaffected
LinuxLinux5.10.221 <= 5.10.*unaffected
LinuxLinux5.15.162 <= 5.15.*unaffected
LinuxLinux6.1.129 <= 6.1.*unaffected
LinuxLinux6.6.35 <= 6.6.*unaffected
LinuxLinux6.9.6 <= 6.9.*unaffected
LinuxLinux6.10 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

Additional References

References