CVE-2026-31642: rxrpc: Fix call removal to use RCU safe deletion

Q: What is the severity of CVE-2026-31642?

CVE-2026-31642 is considered to have low severity as it mainly affects the implementation of call removal in the Linux kernel.

Q: How do I fix CVE-2026-31642?

To fix CVE-2026-31642, update your Linux kernel to the latest version where the vulnerability has been addressed.

Q: What systems are affected by CVE-2026-31642?

CVE-2026-31642 affects various versions of the Linux kernel that utilize the rxrpc feature.

Q: What are the potential impacts of CVE-2026-31642?

The potential impact of CVE-2026-31642 includes possible disruption in the handling of remote procedure calls within affected systems.

Q: Is CVE-2026-31642 actively being exploited?

As of now, there are no known active exploits for CVE-2026-31642 in the wild.

Published Apr 24, 2026

Updated

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

rxrpc: Fix call removal to use RCU safe deletion

Fix rxrpc call removal from the rxnet->calls list to use listdelrcu() rather than listdelinit() to prevent stuffing up reading /proc/net/rxrpc/calls from potentially getting into an infinite loop.

This, however, means that listempty() no longer works on an entry that's been deleted from the list, making it harder to detect prior deletion. Fix this by:

Firstly, make rxrpcdestroyallcalls() only dump the first ten calls that are unexpectedly still on the list. Limiting the number of steps means there's no need to call condresched() or to remove calls from the list here, thereby eliminating the need for rxrpcputcall() to check for that.

rxrpcputcall() can then be fixed to unconditionally delete the call from the list as it is the only place that the deletion occurs.

Affected Software

250 affected componentsFixes available

Linux Linux kernel

Microsoft azl3 kernel 6.6.134.1-2

Patch available

Linux Linux kernel>=4.13.1<6.6.135

Linux Linux kernel>=6.7<6.12.82

Linux Linux kernel>=6.13<6.18.23

Linux Linux kernel>=6.19<6.19.13

Linux Linux kernel=4.13

Linux Linux kernel=7.0-rc1

Linux Linux kernel=7.0-rc2

Linux Linux kernel=7.0-rc3

Linux Linux kernel=7.0-rc4

Linux Linux kernel=7.0-rc5

Linux Linux kernel=7.0-rc6

Linux Linux kernel=7.0-rc7

Microsoft azl3 kernel 6.6.134.1-2<6.6.137.1-1

6.6.137.1-1

debian/linux

6.1.176-16.1.190-16.12.107-16.12.115-27.2.12-17.2.15-1

ubuntu/linux-azure*

ubuntu/linux-aws-hwe*

ubuntu/linux-azure*

ubuntu/linux-gcp*

ubuntu/linux-hwe*

ubuntu/linux-hwe-edge*

ubuntu/linux-oracle*

ubuntu/linux*

ubuntu/linux-aws*

ubuntu/linux-aws-5.0*

ubuntu/linux-aws-5.3*

ubuntu/linux-aws-5.4*

ubuntu/linux-azure*

ubuntu/linux-azure-4.15*

ubuntu/linux-azure-5.3*

ubuntu/linux-azure-5.4*

ubuntu/linux-azure-edge*

ubuntu/linux-gcp*

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ubuntu/linux-raspi-5.4*

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ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

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ubuntu/linux-gcp-fips*

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5.15.0-1064.66~20.04.1

ubuntu/linux-oem-5.10*

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ubuntu/linux-azure<5.15.0-1117.126

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ubuntu/linux-azure-5.19*

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ubuntu/linux-azure-fde<5.15.0-1117.126

5.15.0-1117.126

ubuntu/linux-azure-fde-5.19*

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6.8.0-1062.69~22.04.1

ubuntu/linux-gcp<5.15.0-1112.122

5.15.0-1112.122

ubuntu/linux-gcp-5.19*

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5.15.0-1108.114

ubuntu/linux-gkeop<5.15.0-1095.103

5.15.0-1095.103

ubuntu/linux-hwe-5.19*

ubuntu/linux-hwe-6.2*

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ubuntu/linux-intel-iot-realtime*

ubuntu/linux-intel-iotg<5.15.0-1107.113

5.15.0-1107.113

ubuntu/linux-kvm<5.15.0-1104.109

5.15.0-1104.109

ubuntu/linux-lowlatency<5.15.0-184.194

5.15.0-184.194

ubuntu/linux-lowlatency-hwe-5.19*

ubuntu/linux-lowlatency-hwe-6.2*

ubuntu/linux-lowlatency-hwe-6.5*

ubuntu/linux-lowlatency-hwe-6.8<6.8.0-136.136.2~22.04.1

6.8.0-136.136.2~22.04.1

ubuntu/linux-nvidia<5.15.0-1107.108

5.15.0-1107.108

ubuntu/linux-nvidia-6.2*

ubuntu/linux-nvidia-6.5*

ubuntu/linux-nvidia-6.8<6.8.0-1059.62~22.04.1

6.8.0-1059.62~22.04.1

ubuntu/linux-nvidia-tegra<5.15.0-1064.66

5.15.0-1064.66

ubuntu/linux-nvidia-tegra-igx<5.15.0-1053.53

5.15.0-1053.53

ubuntu/linux-oem-5.17*

ubuntu/linux-oem-6.0*

ubuntu/linux-oem-6.1*

ubuntu/linux-oem-6.5*

ubuntu/linux-oracle<5.15.0-1109.115

5.15.0-1109.115

ubuntu/linux-oracle-6.5*

ubuntu/linux-oracle-6.8<6.8.0-1058.61~22.04.1

6.8.0-1058.61~22.04.1

ubuntu/linux-raspi<5.15.0-1106.109

5.15.0-1106.109

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.19*

ubuntu/linux-riscv-6.5*

ubuntu/linux-riscv-6.8<6.8.0-136.136~22.04.3

6.8.0-136.136~22.04.3

ubuntu/linux-starfive-5.19*

ubuntu/linux-starfive-6.2*

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ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

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ubuntu/linux-azure-nvidia*

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ubuntu/linux-gcp<6.8.0-1064.72

6.8.0-1064.72

ubuntu/linux-gcp-6.11*

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ubuntu/linux-gke<6.8.0-1059.67

6.8.0-1059.67

ubuntu/linux-gkeop<6.8.0-1046.50

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ubuntu/linux-lowlatency<6.8.0-136.136.2

6.8.0-136.136.2

ubuntu/linux-lowlatency-hwe-6.11*

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6.8.0-1059.62

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ubuntu/linux-nvidia-6.17*

ubuntu/linux-nvidia-lowlatency<6.8.0-1059.62.1

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ubuntu/linux-nvidia-tegra<6.8.0-1030.31

6.8.0-1030.31

ubuntu/linux-oem-6.11*

ubuntu/linux-oem-6.14*

ubuntu/linux-oem-6.17*

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ubuntu/linux-oracle<6.8.0-1058.61

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ubuntu/linux-xilinx<6.8.0-1033.34

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ubuntu/linux-bluefield<6.8.0-1028.33

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6.8.0-1063.71+fips2

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6.8.0-136.136+fips2

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6.8.0-1064.72+fips1

ubuntu/linux*

ubuntu/linux-aws*

ubuntu/linux-azure*

ubuntu/linux-azure-fde*

ubuntu/linux-gcp*

ubuntu/linux-oracle*

ubuntu/linux-raspi*

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-nvidia<7.0.0-1006.6

7.0.0-1006.6

Remediation

Recommended actions to resolve this vulnerability, in priority order.

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Fixed in 6.6.137.1-1
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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
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Fixed in 5.15.0-1117.126~20.04.2
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Fixed in 5.15.0-1112.122~20.04.1
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Fixed in 5.15.0-186.196~20.04.1
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Fixed in 5.15.0-1106.110~20.04.1
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Fixed in 5.15.0-1107.113~20.04.1
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Fixed in 5.15.0-184.194~20.04.1
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Fixed in 5.15.0-1109.115~20.04.1
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Fixed in 5.15.0-1106.110~20.04.1
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Fixed in 5.15.0-1117.126
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Fixed in 6.8.0-1062.69~22.04.1
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Fixed in 5.15.0-1112.122
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Fixed in 6.8.0-1064.72~22.04.1
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Fixed in 5.15.0-1106.110
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Fixed in 6.8.0-1061.62~22.04.1
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Fixed in 5.15.0-184.194
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Fixed in 6.8.0-136.136~22.04.3
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Fixed in 5.15.0-1111.120
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Fixed in 6.8.1-1056.57~22.04.2
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Fixed in 5.15.0-1112.122+fips1
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Fixed in 6.8.0-1064.72
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Fixed in 6.8.0-1059.67
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Fixed in 6.8.0-1046.50
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Fixed in 6.8.0-1061.62
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Fixed in 6.8.0-136.136.2
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Fixed in 6.8.0-1059.62
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Fixed in 6.8.0-1059.62.1
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Fixed in 6.8.0-1061.64+fips1
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Fixed in 6.8.0-136.136+fips2
Upgrade
Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.
Fixed in 6.8.0-1064.72+fips1
Upgrade
Upgrade ubuntu/linux-nvidia to a version that resolves this vulnerability.
Fixed in 7.0.0-1006.6

Event History

Apr 24, 2026

CVE Published

via MITRE·02:44 PM

Data Sourced

via MITRE·02:44 PM

Description

Data Sourced

via OSV·03:16 PM

DescriptionSeverityAffected Software

Event

via OSV·03:16 PM

Data Sourced

via NVD·03:16 PM

RemedyDescriptionSeverityWeaknessAffected Software

Apr 26, 2026

Data Sourced

via Microsoft·08:05 AM

DescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

DSA-6238

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

What is the severity of CVE-2026-31642?

CVE-2026-31642 is considered to have low severity as it mainly affects the implementation of call removal in the Linux kernel.

How do I fix CVE-2026-31642?

To fix CVE-2026-31642, update your Linux kernel to the latest version where the vulnerability has been addressed.

What systems are affected by CVE-2026-31642?

CVE-2026-31642 affects various versions of the Linux kernel that utilize the rxrpc feature.

What are the potential impacts of CVE-2026-31642?

The potential impact of CVE-2026-31642 includes possible disruption in the handling of remote procedure calls within affected systems.

Is CVE-2026-31642 actively being exploited?

As of now, there are no known active exploits for CVE-2026-31642 in the wild.

CVE-2026-31642: rxrpc: Fix call removal to use RCU safe deletion

Affected Software

Remediation

Event History

Parent advisories

Peer vulnerabilities

Frequently Asked Questions

What is the severity of CVE-2026-31642?

How do I fix CVE-2026-31642?

What systems are affected by CVE-2026-31642?

What are the potential impacts of CVE-2026-31642?

Is CVE-2026-31642 actively being exploited?

Company

Resources

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