CVE-2025-21742

Summary

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

usbnet: ipheth: use static NDP16 location in URB

Original code allowed for the start of NDP16 to be anywhere within the URB based on the wNdpIndex value in NTH16. Only the start position of NDP16 was checked, so it was possible for even the fixed-length part of NDP16 to extend past the end of URB, leading to an out-of-bounds read.

On iOS devices, the NDP16 header always directly follows NTH16. Rely on and check for this specific format.

This, along with NCM-specific minimal URB length check that already exists, will ensure that the fixed-length part of NDP16 plus a set amount of DPEs fit within the URB.

Note that this commit alone does not fully address the OoB read. The limit on the amount of DPEs needs to be enforced separately.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxa2d274c62e44b1995c170595db3865c6fe701226 < 8fb062178e1ce180e2cfdc9abc83a1b9fea381caaffected
LinuxLinuxa2d274c62e44b1995c170595db3865c6fe701226 < cf1ac7f7cf601ac31d1580559c002b5e37b733b7affected
LinuxLinuxa2d274c62e44b1995c170595db3865c6fe701226 < 2b619445dcb6dab97d8ed033fb57225aca1288c4affected
LinuxLinuxa2d274c62e44b1995c170595db3865c6fe701226 < 86586dcb75cb8fd062a518aca8ee667938b91efbaffected
LinuxLinux6.5affected
LinuxLinux0 < 6.5unaffected
LinuxLinux6.6.78 <= 6.6.*unaffected
LinuxLinux6.12.14 <= 6.12.*unaffected
LinuxLinux6.13.3 <= 6.13.*unaffected
LinuxLinux6.14 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

References