CVE-2025-21742
usbnet: ipheth: use static NDP16 location in URB
Reported by linux · Published February 27, 2025
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.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| linux_kernel | linux | 6.14, 6.13.3, 6.12.14, 6.6.78 |
| Linux | Linux | 8fb062178e1ce180e2cfdc9abc83a1b9fea381ca, 86586dcb75cb8fd062a518aca8ee667938b91efb |
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | a2d274c62e44b1995c170595db3865c6fe701226, a2d274c62e44b1995c170595db3865c6fe701226, a2d274c62e44b1995c170595db3865c6fe701226 |
| Linux | Linux | 6.5, 0, 6.6.78 |
| linux | linux_kernel | 6.5, 6.5, 6.5 |
| Linux | Linux | *, *, 6.5 |
Timeline
- Feb 26, 2025 CVE Published
- Feb 27, 2025 EPSS Score (30 in total, the first dated here)
- Mar 8, 2025 Coalition ESS Score (9 in total, the first dated here)
- Dec 22, 2025 Security Advisory (357 in total, the first dated here)
- Nov 1, 2026 CVE Updated
- Nov 2, 2026 Distribution Patch (312 in total, the first dated here)
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