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No exploitation reportedFix available

CVE-2023-46838

No exploitation reported by the sources we read.

  • Published2024-01-29
  • Fixed in6.7.2 · 6.6.14 · 6.1.75 · 5.15.148 · 5.10.209 · 5.4.268
  • WeaknessCWE-476

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2024-01-2911:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-46838?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-46838?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Linux linux kernel
BranchAffectedFixed in
6.7≥ 6.7, < 6.7.26.7.2
6.x≥ 6.2, < 6.6.146.6.14
6.1≥ 5.16, < 6.1.756.1.75
5.x≥ 5.11, < 5.15.1485.15.148
5.x≥ 5.5, < 5.10.2095.10.209
5.4≥ 4.20, < 5.4.2685.4.268
4.x≥ 4.14, < 4.19.3064.19.306
Fedoraproject fedora
BranchAffectedFixed in
38.x= 38no fix published
39.x= 39no fix published
Debian debian linux
BranchAffectedFixed in
10.0= 10.0no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Linux linux kernel to 6.7.2 · 6.6.14 · 6.1.75 · 5.15.148 · 5.10.209 · 5.4.268 · 4.19.306

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2024-01-29
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is 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.

Is CVE-2023-46838 actively exploited?

Active exploitation of CVE-2023-46838 has not been confirmed. Its EPSS score was 1.2% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-46838?

CVE-2023-46838 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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