UBUNTU-CVE-2025-21742
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.
02 / AFFECTED SOFTWARE
Affected packages
2 explicit affected versions
29 explicit affected versions
10 explicit affected versions
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23 explicit affected versions
1 explicit affected versions
14 explicit affected versions
26 explicit affected versions
30 explicit affected versions
7 explicit affected versions
26 explicit affected versions
4 explicit affected versions
37 explicit affected versions
26 explicit affected versions
10 explicit affected versions
10 explicit affected versions
13 explicit affected versions
13 explicit affected versions
78 explicit affected versions
25 explicit affected versions
19 explicit affected versions
45 explicit affected versions
37 explicit affected versions
8 explicit affected versions
4 explicit affected versions
8 explicit affected versions
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23 explicit affected versions
7 explicit affected versions
10 explicit affected versions
3 explicit affected versions
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33 explicit affected versions
29 explicit affected versions
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13 explicit affected versions
21 explicit affected versions
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26 explicit affected versions
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13 explicit affected versions
10 explicit affected versions
31 explicit affected versions
13 explicit affected versions
10 explicit affected versions
13 explicit affected versions
17 explicit affected versions
1 explicit affected versions
10 explicit affected versions
10 explicit affected versions
1 explicit affected versions
8 explicit affected versions
25 explicit affected versions
13 explicit affected versions
21 explicit affected versions
6 explicit affected versions
13 explicit affected versions
12 explicit affected versions
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7 explicit affected versions
14 explicit affected versions
18 explicit affected versions
12 explicit affected versions
26 explicit affected versions
1 explicit affected versions
21 explicit affected versions
13 explicit affected versions
23 explicit affected versions
23 explicit affected versions
14 explicit affected versions
5 explicit affected versions
24 explicit affected versions
5 explicit affected versions
21 explicit affected versions
3 explicit affected versions
26 explicit affected versions
12 explicit affected versions
44 explicit affected versions
4 explicit affected versions
4 explicit affected versions
4 explicit affected versions
16 explicit affected versions
9 explicit affected versions
12 explicit affected versions
4 explicit affected versions
27 explicit affected versions
7 explicit affected versions
13 explicit affected versions
7 explicit affected versions
5 explicit affected versions
13 explicit affected versions
7 explicit affected versions
10 explicit affected versions
14 explicit affected versions
18 explicit affected versions
3 explicit affected versions
16 explicit affected versions
43 explicit affected versions
11 explicit affected versions
35 explicit affected versions
12 explicit affected versions
13 explicit affected versions
6 explicit affected versions
12 explicit affected versions
1 explicit affected versions
24 explicit affected versions
50 explicit affected versions
11 explicit affected versions
12 explicit affected versions
19 explicit affected versions
27 explicit affected versions
12 explicit affected versions
7 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/86586dcb75cb8fd062a518aca8ee667938b91efb
- https://git.kernel.org/stable/c/2b619445dcb6dab97d8ed033fb57225aca1288c4
- https://git.kernel.org/stable/c/86586dcb75cb8fd062a518aca8ee667938b91efb
- https://git.kernel.org/stable/c/8fb062178e1ce180e2cfdc9abc83a1b9fea381ca
- https://git.kernel.org/stable/c/cf1ac7f7cf601ac31d1580559c002b5e37b733b7
- https://ubuntu.com/security/CVE-2025-21742
- https://ubuntu.com/security/notices/USN-7521-1
- https://ubuntu.com/security/notices/USN-7521-2
- https://ubuntu.com/security/notices/USN-7521-3
- https://ubuntu.com/security/notices/USN-7651-1
- https://ubuntu.com/security/notices/USN-7651-2
- https://ubuntu.com/security/notices/USN-7651-3
- https://ubuntu.com/security/notices/USN-7651-4
- https://ubuntu.com/security/notices/USN-7651-5
- https://ubuntu.com/security/notices/USN-7651-6
- https://ubuntu.com/security/notices/USN-7652-1
- https://ubuntu.com/security/notices/USN-7653-1
- https://ubuntu.com/security/notices/USN-7737-1
- https://www.cve.org/CVERecord?id=CVE-2025-21742