UBUNTU-CVE-2023-46838
Transmit requests in Xen's virtual network protocol can consist of multiple parts. While not really useful, except for the initial part any of them may be of zero length, i.e. carry no data at all. Besides a certain initial portion of the to be transferred data, these parts are directly translated into what Linux calls SKB fragments. Such converted request parts can, when for a particular SKB they are all of length zero, lead to a de-reference of NULL in core networking code.
02 / AFFECTED SOFTWARE
Affected packages
4 explicit affected versions
27 explicit affected versions
39 explicit affected versions
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6 explicit affected versions
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35 explicit affected versions
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3 explicit affected versions
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4 explicit affected versions
23 explicit affected versions
1 explicit affected versions
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39 explicit affected versions
7 explicit affected versions
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12 explicit affected versions
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10 explicit affected versions
37 explicit affected versions
6 explicit affected versions
10 explicit affected versions
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1 explicit affected versions
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13 explicit affected versions
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1 explicit affected versions
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5 explicit affected versions
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23 explicit affected versions
10 explicit affected versions
87 explicit affected versions
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26 explicit affected versions
21 explicit affected versions
1 explicit affected versions
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45 explicit affected versions
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35 explicit affected versions
3 explicit affected versions
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1 explicit affected versions
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1 explicit affected versions
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25 explicit affected versions
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1 explicit affected versions
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5 explicit affected versions
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13 explicit affected versions
39 explicit affected versions
7 explicit affected versions
65 explicit affected versions
37 explicit affected versions
10 explicit affected versions
11 explicit affected versions
12 explicit affected versions
74 explicit affected versions
44 explicit affected versions
16 explicit affected versions
3 explicit affected versions
13 explicit affected versions
26 explicit affected versions
31 explicit affected versions
37 explicit affected versions
7 explicit affected versions
38 explicit affected versions
35 explicit affected versions
9 explicit affected versions
34 explicit affected versions
11 explicit affected versions
42 explicit affected versions
8 explicit affected versions
7 explicit affected versions
16 explicit affected versions
46 explicit affected versions
114 explicit affected versions
93 explicit affected versions
4 explicit affected versions
1 explicit affected versions
1 explicit affected versions
40 explicit affected versions
86 explicit affected versions
7 explicit affected versions
43 explicit affected versions
40 explicit affected versions
137 explicit affected versions
10 explicit affected versions
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14 explicit affected versions
75 explicit affected versions
4 explicit affected versions
64 explicit affected versions
3 explicit affected versions
1 explicit affected versions
40 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
Transmit requests in Xen's virtual network protocol can consist of multiple parts. While not really useful, except for the initial part any of them may be of zero length, i.e. carry no data at all. Besides a certain initial portion of the to be transferred data, these parts are directly translated into what Linux calls SKB fragments. Such converted request parts can, when for a particular SKB they are all of length zero, lead to a de-reference of NULL in core networking code.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/c7ec4f2d684e17d69bbdd7c4324db0ef5daac26a
- https://ubuntu.com/security/CVE-2023-46838
- https://ubuntu.com/security/notices/USN-6688-1
- https://ubuntu.com/security/notices/USN-6701-1
- https://ubuntu.com/security/notices/USN-6701-2
- https://ubuntu.com/security/notices/USN-6701-3
- https://ubuntu.com/security/notices/USN-6701-4
- https://ubuntu.com/security/notices/USN-6724-1
- https://ubuntu.com/security/notices/USN-6724-2
- https://ubuntu.com/security/notices/USN-6725-1
- https://ubuntu.com/security/notices/USN-6725-2
- https://ubuntu.com/security/notices/USN-6726-1
- https://ubuntu.com/security/notices/USN-6726-2
- https://ubuntu.com/security/notices/USN-6726-3
- https://www.cve.org/CVERecord?id=CVE-2023-46838
- https://www.openwall.com/lists/oss-security/2024/01/22/2
- https://xenbits.xen.org/xsa/advisory-448.html