CVE-2026-43503: net: skbuff: propagate shared-frag marker through frag-transfer helpers

Published May 23, 2026
·
Updated

In the Linux kernel, the following vulnerability has been resolved:

Other sources

net: skbuff: propagate shared-frag marker through frag-transfer helpers

— Microsoft

Affected Software

21 affected componentsFixes available
Linux Linux kernel
Microsoft azl3 kernel 6.6.139.1-1<6.6.141.1-1
6.6.141.1-1
Linux Linux kernel>=3.9<5.10.257
Linux Linux kernel>=5.11<5.15.208
Linux Linux kernel>=5.16<6.1.174
Linux Linux kernel>=6.2<6.6.141
Linux Linux kernel>=6.7<6.12.91
Linux Linux kernel>=6.13<6.18.33
Linux Linux kernel>=6.19<7.0.10
Linux Linux kernel=7.1-rc1
Linux Linux kernel=7.1-rc2
Linux Linux kernel=7.1-rc3
Linux Linux kernel=7.1-rc4
linux/kernel>=3.9.0<5.10.257
5.10.257
linux/kernel>=5.11.0<5.15.208
5.15.208
linux/kernel>=5.16.0<6.1.174
6.1.174
linux/kernel>=6.2.0<6.6.141
6.6.141
linux/kernel>=6.7.0<6.12.91
6.12.91
linux/kernel>=6.13.0<6.18.33
6.18.33
linux/kernel>=6.19.0<7.0.10
7.0.10
debian/linux
6.1.176-16.1.190-16.12.107-16.12.115-27.2.12-17.2.15-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 6.6.141.1-1
  2. Upgrade

    Upgrade linux/Kernel to a version that resolves this vulnerability.

    Fixed in 5.10.257
  3. Upgrade

    Upgrade linux/Kernel to a version that resolves this vulnerability.

    Fixed in 5.15.208
  4. Upgrade

    Upgrade linux/Kernel to a version that resolves this vulnerability.

    Fixed in 6.1.174
  5. Upgrade

    Upgrade linux/Kernel to a version that resolves this vulnerability.

    Fixed in 6.6.141
  6. Upgrade

    Upgrade linux/Kernel to a version that resolves this vulnerability.

    Fixed in 6.12.91
  7. Upgrade

    Upgrade linux/Kernel to a version that resolves this vulnerability.

    Fixed in 6.18.33
  8. Upgrade

    Upgrade linux/Kernel to a version that resolves this vulnerability.

    Fixed in 7.0.10
  9. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.107-1Fixed in 6.12.115-2Fixed in 7.2.12-1Fixed in 7.2.15-1
  10. Upgrade

    Upgrade Linux kernel to a version that resolves this vulnerability.

    Patch CVE-2026-43503

Event History

May 23, 2026
CVE Published
via MITRE·11:44 AM
Data Sourced
via MITRE·11:44 AM
DescriptionSeverity
Data Sourced
via OSV·11:44 AM
DescriptionSeverityAffected Software
Data Sourced
via NVD·12:17 PM
RemedyDescriptionSeverityWeaknessAffected Software
Data Sourced
via Red Hat·01:01 PM
DescriptionSeverityAffected Software
May 27, 2026
Data Sourced
via Microsoft·08:01 AM
DescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of CVE-2026-43503?

CVE-2026-43503 has a risk rating of 58, indicating a moderate severity vulnerability.

2

How do I fix CVE-2026-43503?

To fix CVE-2026-43503, update your Linux kernel to the latest available version that addresses this vulnerability.

3

What is affected by CVE-2026-43503?

CVE-2026-43503 affects the Linux kernel's handling of socket buffer (skbuff) operations.

4

What is the impact of CVE-2026-43503?

The impact of CVE-2026-43503 is related to potential data integrity issues when transferring fragments in network packets.

5

When was CVE-2026-43503 published?

CVE-2026-43503 was published on May 23, 2026.

Company

Resources

Contact

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