CVE-2025-21749: net: rose: lock the socket in rose_bind()

Q: What is the severity of CVE-2025-21749?

CVE-2025-21749 has been classified as a medium severity vulnerability due to its potential to cause soft lockups in the Linux kernel.

Q: How do I fix CVE-2025-21749?

To fix CVE-2025-21749, update the Linux kernel to a version that includes the patch for this vulnerability.

Q: What systems are affected by CVE-2025-21749?

CVE-2025-21749 affects multiple versions of the Linux kernel, specifically those versions between 2.6.12 and 6.6.78, as well as 6.12.14 and 6.14-rc1.

Q: What is the nature of the issue in CVE-2025-21749?

CVE-2025-21749 involves a soft lockup due to improper handling of socket locking in the rose_bind() function.

Q: Is there a known exploit for CVE-2025-21749?

As of now, there are no publicly known exploits for CVE-2025-21749, but proper updates are recommended to mitigate risks.

Published Feb 27, 2025

Updated

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

net: rose: lock the socket in rosebind()

syzbot reported a soft lockup in roseloopbacktimer(), with a repro calling bind() from multiple threads.

rosebind() must lock the socket to avoid this issue.

Affected Software

218 affected componentsFixes available

Linux Linux kernel>=2.6.12<6.1.129

Linux Linux kernel>=6.2<6.6.78

Linux Linux kernel>=6.7<6.12.14

Linux Linux kernel>=6.13<6.13.3

Linux Linux kernel=6.14-rc1

Microsoft azl3 kernel 6.6.64.2-9

Patch available

Microsoft cbl2 kernel 5.15.182.1-1

Microsoft azl3 kernel 6.6.78.1-3

Patch available

Microsoft cbl2 kernel 5.15.179.1-1

Patch available

Microsoft cbl2 kernel 5.15.182.1-1

Patch available

ubuntu/linux*

ubuntu/linux-aws*

ubuntu/linux-azure*

ubuntu/linux-lts-xenial*

ubuntu/linux*

ubuntu/linux-aws*

ubuntu/linux-aws-hwe*

ubuntu/linux-azure*

ubuntu/linux-gcp*

ubuntu/linux-hwe*

ubuntu/linux-hwe-edge*

ubuntu/linux-kvm*

ubuntu/linux-oracle*

ubuntu/linux-fips*

ubuntu/linux*

ubuntu/linux-aws*

ubuntu/linux-aws-5.0*

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ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

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ubuntu/linux-gcp-fips*

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ubuntu/linux-aws-5.19*

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ubuntu/linux-gkeop<5.15.0-1066.74

5.15.0-1066.74

ubuntu/linux-hwe-5.19*

ubuntu/linux-hwe-6.2*

ubuntu/linux-hwe-6.5*

ubuntu/linux-hwe-6.8<6.8.0-64.67~22.04.1

6.8.0-64.67~22.04.1

ubuntu/linux-ibm<5.15.0-1076.79

5.15.0-1076.79

ubuntu/linux-ibm-6.8<6.8.0-1029.29~22.04.1

6.8.0-1029.29~22.04.1

ubuntu/linux-intel-iot-realtime*

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ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.19*

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6.8.0-64.67~22.04.1

ubuntu/linux-starfive-5.19*

ubuntu/linux-starfive-6.2*

ubuntu/linux-starfive-6.5*

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5.15.0-1083.92+fips1

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6.8.0-1032.34

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ubuntu/linux-gke<6.8.0-1028.32

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ubuntu/linux-gkeop<6.8.0-1015.17

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6.11.0-26.26~24.04.1

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6.8.0-64.67.1

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6.11.0-1014.15~24.04.1

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ubuntu/linux-nvidia-6.11<6.11.0-1010.10

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6.8.0-1031.34.1

ubuntu/linux-nvidia-tegra<6.8.0-1008.8

6.8.0-1008.8

ubuntu/linux-oem-6.11<6.11.0-1022.22

6.11.0-1022.22

ubuntu/linux-oem-6.8<6.8.0-1031.31

6.8.0-1031.31

ubuntu/linux-oracle<6.8.0-1029.30

6.8.0-1029.30

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6.8.0-1031.35

ubuntu/linux-raspi-realtime*

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-xilinx<6.8.0-1017.18

6.8.0-1017.18

ubuntu/linux-raspi-realtime<6.8.0-2026.27

6.8.0-2026.27

ubuntu/linux-realtime<6.8.1-1025.26

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ubuntu/linux-fips<6.8.0-78.78+fips1

6.8.0-78.78+fips1

ubuntu/linux-vmware*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

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Fixed in 5.4.0-1146.156~18.04.1
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Fixed in 5.4.0-1151.158~18.04.1
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Fixed in 5.4.0-1149.158~18.04.1
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Fixed in 5.4.0-216.236~18.04.1
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Fixed in 5.4.0-1092.97~18.04.1
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Fixed in 5.4.0-1144.154~18.04.1
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Fixed in 5.4.0-1129.142~18.04.1
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Fixed in 5.4.0-216.236
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Fixed in 5.4.0-1146.156
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Fixed in 5.15.0-1084.91~20.04.1
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Fixed in 5.4.0-1151.158
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Fixed in 5.15.0-1089.98~20.04.1
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Fixed in 5.4.0-1105.112
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Fixed in 5.4.0-1149.158
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Fixed in 5.15.0-1083.92~20.04.1
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Fixed in 5.4.0-1092.97
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Fixed in 5.15.0-1076.79~20.04.1
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Fixed in 5.15.0-1079.85~20.04.1
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Fixed in 5.4.0-1133.142
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Fixed in 5.15.0-140.150~20.04.1
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Fixed in 5.4.0-1144.154
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Fixed in 5.15.0-1081.87~20.04.1
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Fixed in 5.4.0-1129.142
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Fixed in 5.15.0-1079.83~20.04.1
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Fixed in 5.4.0-1064.68
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Fixed in 5.15.0-142.152~20.04.1
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Fixed in 5.4.0-1051.54
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Fixed in 5.15.0-1039.39~20.04.1
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Fixed in 5.4.0-1146.156+fips1
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Fixed in 5.4.0-1151.158+fips1
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Fixed in 5.4.0-1120.130
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Fixed in 5.4.0-1149.158+fips1
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Fixed in 5.15.0-140.150
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Fixed in 5.15.0-1084.91
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Fixed in 5.15.0-1089.98
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Fixed in 5.15.0-1083.92
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Fixed in 6.8.0-1033.35~22.04.1
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Fixed in 5.15.0-1081.87
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Fixed in 5.15.0-1066.74
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Fixed in 6.8.0-64.67~22.04.1
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Fixed in 5.15.0-1076.79
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Fixed in 6.8.0-1029.29~22.04.1
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Fixed in 5.15.0-1079.85
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Fixed in 5.15.0-1080.85
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Fixed in 5.15.0-140.150
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Fixed in 6.8.0-64.67.1~22.04.1
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Fixed in 5.15.0-1078.79
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Fixed in 6.8.0-1031.34~22.04.1
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Fixed in 5.15.0-1037.37
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Fixed in 5.15.0-1026.26
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Fixed in 5.15.0-1081.87
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Fixed in 6.8.0-1029.30~22.04.1
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Fixed in 5.15.0-1078.81
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Fixed in 6.8.0-64.67~22.04.1
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Fixed in 5.15.0-1050.54
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Fixed in 5.15.0-1066.68
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Fixed in 5.15.0-1077.79
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Fixed in 5.15.0-1084.93
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Fixed in 6.8.1-1025.26~22.04.1
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Fixed in 5.15.0-1084.91+fips1
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Fixed in 5.15.0-1089.98+fips1
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Fixed in 5.15.0-140.150+fips1
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Fixed in 5.15.0-1083.92+fips1
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Fixed in 6.8.0-64.67
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Fixed in 6.8.0-1032.34
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Fixed in 6.8.0-1034.39
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Fixed in 6.11.0-1015.15~24.04.1
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Fixed in 6.8.0-1022.23
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Fixed in 6.8.0-1033.35
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Fixed in 6.11.0-1015.15~24.04.1
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Fixed in 6.8.0-1028.32
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Fixed in 6.8.0-1015.17
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Fixed in 6.11.0-26.26~24.04.1
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Fixed in 6.8.0-1029.29
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Fixed in 6.8.0-64.67.1
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Fixed in 6.11.0-1014.15~24.04.1
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Fixed in 6.8.0-1031.34
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Fixed in 6.11.0-1010.10
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Fixed in 6.8.0-1031.34.1
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Fixed in 6.8.0-1008.8
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Fixed in 6.11.0-1022.22
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Fixed in 6.8.0-1031.31
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Fixed in 6.8.0-1029.30
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Fixed in 6.8.0-1031.35
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Fixed in 6.8.0-1017.18
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Fixed in 6.8.0-2026.27
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Fixed in 6.8.1-1025.26
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Fixed in 6.8.0-78.78+fips1
Compensating control
Modify net: rose so that rose_bind() locks the socket before operating on it, preventing concurrent bind() calls from causing the rose_loopback_timer() soft lockup.

Event History

Feb 27, 2025

CVE Published

via MITRE·02:12 AM

Data Sourced

via MITRE·02:12 AM

Description

Data Sourced

via OSV·03:15 AM

DescriptionSeverityAffected Software

Data Sourced

via NVD·03:15 AM

RemedyDescriptionSeverityWeaknessAffected Software

Mar 14, 2025

Data Sourced

via Microsoft·07:00 AM

DescriptionSeverityWeakness

Data Sourced

via Microsoft·07:00 AM

Affected Software

Frequently Asked Questions

What is the severity of CVE-2025-21749?

CVE-2025-21749 has been classified as a medium severity vulnerability due to its potential to cause soft lockups in the Linux kernel.

How do I fix CVE-2025-21749?

To fix CVE-2025-21749, update the Linux kernel to a version that includes the patch for this vulnerability.

What systems are affected by CVE-2025-21749?

CVE-2025-21749 affects multiple versions of the Linux kernel, specifically those versions between 2.6.12 and 6.6.78, as well as 6.12.14 and 6.14-rc1.

What is the nature of the issue in CVE-2025-21749?

CVE-2025-21749 involves a soft lockup due to improper handling of socket locking in the rose_bind() function.

Is there a known exploit for CVE-2025-21749?

As of now, there are no publicly known exploits for CVE-2025-21749, but proper updates are recommended to mitigate risks.

CVE-2025-21749: net: rose: lock the socket in rose_bind()

Affected Software

Remediation

Event History

Frequently Asked Questions

What is the severity of CVE-2025-21749?

How do I fix CVE-2025-21749?

What systems are affected by CVE-2025-21749?

What is the nature of the issue in CVE-2025-21749?

Is there a known exploit for CVE-2025-21749?

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