CVE-2023-46838
Linux: netback processing of zero-length transmit fragment
Description
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.
INFO
Published Date :
Jan. 29, 2024, 11:15 a.m.
Last Modified :
June 2, 2025, 7:15 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2023-46838
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Update the affected kernel or Linux packages.
- Reboot the system to apply the update.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2023-46838.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-46838 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2023-46838
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2023-46838 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-46838 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 02, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-476 -
CVE Modified by [email protected]
Feb. 13, 2025
Action Type Old Value New Value Changed Description 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. 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. -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html Added Reference https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/RGEKT4DKSDXDS34EL7M4UVJMMPH7Z3ZZ/ Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/ZFYW6R64GPLUOXSQBJI3JBUX3HGLAYPP/ Added Reference https://xenbits.xenproject.org/xsa/advisory-448.html -
Modified Analysis by [email protected]
Aug. 27, 2024
Action Type Old Value New Value Changed Reference Type https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html No Types Assigned https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html Mailing List, Third Party Advisory Changed Reference Type https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html No Types Assigned https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html Mailing List, Third Party Advisory Changed CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.14 up to (excluding) 6.7 OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.14 up to (excluding) 4.19.306 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.268 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.209 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.148 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.75 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.14 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.7.2 Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Jun. 27, 2024
Action Type Old Value New Value Added Reference Xen Project https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html [No types assigned] -
CVE Modified by [email protected]
Jun. 25, 2024
Action Type Old Value New Value Added Reference Xen Project https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html [No types assigned] -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Feb. 15, 2024
Action Type Old Value New Value Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/RGEKT4DKSDXDS34EL7M4UVJMMPH7Z3ZZ/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/RGEKT4DKSDXDS34EL7M4UVJMMPH7Z3ZZ/ Mailing List Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/ZFYW6R64GPLUOXSQBJI3JBUX3HGLAYPP/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/ZFYW6R64GPLUOXSQBJI3JBUX3HGLAYPP/ Mailing List Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Feb. 02, 2024
Action Type Old Value New Value Added Reference Xen Project https://lists.fedoraproject.org/archives/list/[email protected]/message/ZFYW6R64GPLUOXSQBJI3JBUX3HGLAYPP/ [No types assigned] Added Reference Xen Project https://lists.fedoraproject.org/archives/list/[email protected]/message/RGEKT4DKSDXDS34EL7M4UVJMMPH7Z3ZZ/ [No types assigned] -
Initial Analysis by [email protected]
Feb. 02, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://xenbits.xenproject.org/xsa/advisory-448.html No Types Assigned https://xenbits.xenproject.org/xsa/advisory-448.html Patch, Third Party Advisory Added CWE NIST CWE-476 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.14 up to (excluding) 6.7 -
CVE Received by [email protected]
Jan. 29, 2024
Action Type Old Value New Value Added Description 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. Added Reference Xen Project https://xenbits.xenproject.org/xsa/advisory-448.html [No types assigned]
Vulnerability Scoring Details
Base CVSS Score: 7.5
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.08 }} -0.08%
score
0.25527
percentile