UBUNTU-CVE-2025-40104
In the Linux kernel, the following vulnerability has been resolved: ixgbevf: fix mailbox API compatibility by negotiating supported features There was backward compatibility in the terms of mailbox API. Various drivers from various OSes supporting 10G adapters from Intel portfolio could easily negotiate mailbox API. This convention has been broken since introducing API 1.4. Commit 0062e7cc955e ("ixgbevf: add VF IPsec offload code") added support for IPSec which is specific only for the kernel ixgbe driver. None of the rest of the Intel 10G PF/VF drivers supports it. And actually lack of support was not included in the IPSec implementation - there were no such code paths. No possibility to negotiate support for the feature was introduced along with introduction of the feature itself. Commit 339f28964147 ("ixgbevf: Add support for new mailbox communication between PF and VF") increasing API version to 1.5 did the same - it introduced code supported specifically by the PF ESX driver. It altered API version for the VF driver in the same time not touching the version defined for the PF ixgbe driver. It led to additional discrepancies, as the code provided within API 1.6 cannot be supported for Linux ixgbe driver as it causes crashes. The issue was noticed some time ago and mitigated by Jake within the commit d0725312adf5 ("ixgbevf: stop attempting IPSEC offload on Mailbox API 1.5"). As a result we have regression for IPsec support and after increasing API to version 1.6 ixgbevf driver stopped to support ESX MBX. To fix this mess add new mailbox op asking PF driver about supported features. Basing on a response determine whether to set support for IPSec and ESX-specific enhanced mailbox. New mailbox op, for compatibility purposes, must be added within new API revision, as API version of OOT PF & VF drivers is already increased to 1.6 and doesn't incorporate features negotiate op. Features negotiation mechanism gives possibility to be extended with new features when needed in the future.
02 / AFFECTED SOFTWARE
Affected packages
79 explicit affected versions
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34 explicit affected versions
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50 explicit affected versions
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13 explicit affected versions
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12 explicit affected versions
76 explicit affected versions
41 explicit affected versions
8 explicit affected versions
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12 explicit affected versions
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34 explicit affected versions
45 explicit affected versions
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9 explicit affected versions
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10 explicit affected versions
37 explicit affected versions
10 explicit affected versions
1 explicit affected versions
13 explicit affected versions
33 explicit affected versions
3 explicit affected versions
10 explicit affected versions
11 explicit affected versions
68 explicit affected versions
1 explicit affected versions
26 explicit affected versions
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13 explicit affected versions
37 explicit affected versions
34 explicit affected versions
29 explicit affected versions
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34 explicit affected versions
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1 explicit affected versions
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51 explicit affected versions
80 explicit affected versions
8 explicit affected versions
18 explicit affected versions
35 explicit affected versions
12 explicit affected versions
1 explicit affected versions
27 explicit affected versions
66 explicit affected versions
121 explicit affected versions
36 explicit affected versions
8 explicit affected versions
55 explicit affected versions
5 explicit affected versions
8 explicit affected versions
110 explicit affected versions
13 explicit affected versions
72 explicit affected versions
7 explicit affected versions
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9 explicit affected versions
39 explicit affected versions
108 explicit affected versions
80 explicit affected versions
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3 explicit affected versions
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26 explicit affected versions
45 explicit affected versions
37 explicit affected versions
44 explicit affected versions
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38 explicit affected versions
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11 explicit affected versions
32 explicit affected versions
92 explicit affected versions
8 explicit affected versions
7 explicit affected versions
4 explicit affected versions
81 explicit affected versions
1 explicit affected versions
1 explicit affected versions
1 explicit affected versions
43 explicit affected versions
77 explicit affected versions
6 explicit affected versions
119 explicit affected versions
10 explicit affected versions
8 explicit affected versions
38 explicit affected versions
88 explicit affected versions
14 explicit affected versions
4 explicit affected versions
78 explicit affected versions
6 explicit affected versions
11 explicit affected versions
1 explicit affected versions
123 explicit affected versions
12 explicit affected versions
32 explicit affected versions
80 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: ixgbevf: fix mailbox API compatibility by negotiating supported features There was backward compatibility in the terms of mailbox API. Various drivers from various OSes supporting 10G adapters from Intel portfolio could easily negotiate mailbox API. This convention has been broken since introducing API 1.4. Commit 0062e7cc955e ("ixgbevf: add VF IPsec offload code") added support for IPSec which is specific only for the kernel ixgbe driver. None of the rest of the Intel 10G PF/VF drivers supports it. And actually lack of support was not included in the IPSec implementation - there were no such code paths. No possibility to negotiate support for the feature was introduced along with introduction of the feature itself. Commit 339f28964147 ("ixgbevf: Add support for new mailbox communication between PF and VF") increasing API version to 1.5 did the same - it introduced code supported specifically by the PF ESX driver. It altered API version for the VF driver in the same time not touching the version defined for the PF ixgbe driver. It led to additional discrepancies, as the code provided within API 1.6 cannot be supported for Linux ixgbe driver as it causes crashes. The issue was noticed some time ago and mitigated by Jake within the commit d0725312adf5 ("ixgbevf: stop attempting IPSEC offload on Mailbox API 1.5"). As a result we have regression for IPsec support and after increasing API to version 1.6 ixgbevf driver stopped to support ESX MBX. To fix this mess add new mailbox op asking PF driver about supported features. Basing on a response determine whether to set support for IPSec and ESX-specific enhanced mailbox. New mailbox op, for compatibility purposes, must be added within new API revision, as API version of OOT PF & VF drivers is already increased to 1.6 and doesn't incorporate features negotiate op. Features negotiation mechanism gives possibility to be extended with new features when needed in the future.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/a7075f501bd33c93570af759b6f4302ef0175168
- https://git.kernel.org/stable/c/2e0aab9ddaf1428602c78f12064cd1e6ffcc4d18
- https://git.kernel.org/stable/c/871ac1cd4ce4804defcb428cbb003fd84c415ff4
- https://git.kernel.org/stable/c/a376e29b1b196dc90b50df7e5e3947e3026300c4
- https://git.kernel.org/stable/c/a7075f501bd33c93570af759b6f4302ef0175168
- https://git.kernel.org/stable/c/bf580112ed61736c2645a893413a04732505d4b1
- https://ubuntu.com/security/CVE-2025-40104
- https://ubuntu.com/security/notices/USN-8029-1
- https://ubuntu.com/security/notices/USN-8029-2
- https://ubuntu.com/security/notices/USN-8029-3
- https://ubuntu.com/security/notices/USN-8030-1
- https://ubuntu.com/security/notices/USN-8048-1
- https://ubuntu.com/security/notices/USN-8095-1
- https://ubuntu.com/security/notices/USN-8095-2
- https://ubuntu.com/security/notices/USN-8095-3
- https://ubuntu.com/security/notices/USN-8095-4
- https://ubuntu.com/security/notices/USN-8095-5
- https://ubuntu.com/security/notices/USN-8100-1
- https://ubuntu.com/security/notices/USN-8125-1
- https://ubuntu.com/security/notices/USN-8126-1
- https://ubuntu.com/security/notices/USN-8165-1
- https://ubuntu.com/security/notices/USN-8261-1
- https://www.cve.org/CVERecord?id=CVE-2025-40104