CVE-2025-38477: net/sched: sch_qfq: Fix race condition on qfq_aggregate

Modified

AliasesSUSE-SU-2025:03473-1SUSE-SU-2025:03479-1SUSE-SU-2025:03485-1+13 more

Published 28-07-2025Last modified 15-10-2026

Vulnerability summary

CVE-2025-38477 is a high (CVSS 7.8) vulnerability in debian debian_linux. EPSS estimates a 0.14% chance of exploitation in the next 30 days, higher than 3.4% of scored vulnerabilities.

Priority

Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?

CVSS score

7.8/10

010

High · v3.1 (CVE.org)

EPSS score

0.14%

0%100%

Low · +0.02 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 148 · Related 134

DLA-4327-1 DLA-4328-1 DSA-5973-1 DSA-5975-1 MGASA-2025-0218 MGASA-2025-0219+94 more

Showing 100 of 148.

Timeline

28-07-2025
PublishedVulnerability first disclosed.
15-10-2026
Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: net/sched: sch_qfq: Fix race condition on qfq_aggregate A race condition can occur when 'agg' is modified in qfq_change_agg (called during qfq_enqueue) while other threads access it concurrently. For example, qfq_dump_class may trigger a NULL dereference, and qfq_delete_class may cause a use-after-free. This patch addresses the issue by: 1. Moved qfq_destroy_class into the critical section. 2. Added sch_tree_lock protection to qfq_dump_class and qfq_dump_class_stats.

CVSS metrics

5 scores · 4 sources · 2 versions

v4.07.3v3.17.8

EPSS trend

Probability

0.14%

Chance of exploitation in the next 30 days

Percentile

Versus all other CVEs

30-day change

Increase +0.02 pp

From 0.13% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs

CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

CWE-362Concurrent Execution using Shared Resource with Improper SynchronizationThe product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu145 products

linuxAll versions (No fix recorded) | < 4.15.0-242.254 | < 5.4.0-222.242 | < 5.15.0-157.167 | < 6.8.0-85.85
linux-allwinner-5.19All versions (No fix recorded)
linux-awsAll versions (No fix recorded) | < 4.15.0-1185.198 | < 5.4.0-1151.161 | < 5.15.0-1093.100 | < 6.8.0-1040.42
linux-aws-5.0All versions (No fix recorded)
linux-aws-5.11All versions (No fix recorded)

linux-aws-5.13All versions (No fix recorded)
linux-aws-5.15< 5.15.0-1093.100~20.04.1
linux-aws-5.19All versions (No fix recorded)
linux-aws-5.3All versions (No fix recorded)
linux-aws-5.4< 5.4.0-1151.161~18.04.1
linux-aws-5.8All versions (No fix recorded)
linux-aws-6.14< 6.14.0-1014.14~24.04.1
linux-aws-6.2All versions (No fix recorded)
linux-aws-6.5All versions (No fix recorded)
linux-aws-6.8< 6.8.0-1040.42~22.04.1
linux-aws-fips< 4.15.0-2123.129 | All versions (No fix recorded) | < 5.4.0-1151.161+fips1 | < 5.15.0-1093.100+fips1 | < 6.8.0-1040.42+fips1
linux-aws-hwe< 4.15.0-1185.198~16.04.1
linux-azure< 4.15.0-1193.208~14.04.1 | < 4.15.0-1193.208~16.04.1 | All versions (No fix recorded) | < 5.4.0-1154.161 | < 5.15.0-1097.106 | < 6.8.0-1040.46
linux-azure-4.15< 4.15.0-1193.208
linux-azure-5.11All versions (No fix recorded)
linux-azure-5.13All versions (No fix recorded)
linux-azure-5.15< 5.15.0-1097.106~20.04.1
linux-azure-5.19All versions (No fix recorded)
linux-azure-5.3All versions (No fix recorded)
linux-azure-5.4< 5.4.0-1154.161~18.04.1
linux-azure-5.8All versions (No fix recorded)
linux-azure-6.11All versions (No fix recorded)
linux-azure-6.14< 6.14.0-1013.13~24.04.1
linux-azure-6.2All versions (No fix recorded)
linux-azure-6.5All versions (No fix recorded)
linux-azure-6.8< 6.8.0-1040.46~22.04.1
linux-azure-edgeAll versions (No fix recorded)
linux-azure-fdeAll versions (No fix recorded) | < 5.15.0-1098.107.1
linux-azure-fde-5.19All versions (No fix recorded)
linux-azure-fde-6.2All versions (No fix recorded)
linux-azure-fips< 4.15.0-2102.108 | All versions (No fix recorded) | < 5.4.0-1155.162+fips1 | < 5.15.0-1097.106+fips1 | < 6.8.0-1040.46+fips1
linux-azure-nvidia< 6.8.0-1025.27
linux-azure-nvidia-6.14< 6.14.0-1007.7
linux-bluefield< 5.4.0-1110.117 | < 5.15.0-1077.79 | < 6.8.0-1012.16
linux-fipsAll versions (No fix recorded) | < 4.15.0-1140.151 | < 5.4.0-1125.135 | < 5.15.0-157.167+fips1 | < 6.8.0-85.85+fips1
linux-gcp< 4.15.0-1178.195~16.04.1 | All versions (No fix recorded) | < 5.4.0-1154.163 | < 5.15.0-1093.102 | < 6.8.0-1041.43
linux-gcp-4.15< 4.15.0-1178.195
linux-gcp-5.11All versions (No fix recorded)
linux-gcp-5.13All versions (No fix recorded)
linux-gcp-5.15< 5.15.0-1093.102~20.04.1
linux-gcp-5.19All versions (No fix recorded)
linux-gcp-5.3All versions (No fix recorded)
linux-gcp-5.4< 5.4.0-1154.163~18.04.1
linux-gcp-5.8All versions (No fix recorded)
linux-gcp-6.11All versions (No fix recorded)
linux-gcp-6.14< 6.14.0-1017.18~24.04.1
linux-gcp-6.2All versions (No fix recorded)
linux-gcp-6.5All versions (No fix recorded)
linux-gcp-6.8< 6.8.0-1041.43~22.04.1
linux-gcp-fips< 4.15.0-2086.92 | All versions (No fix recorded) | < 5.4.0-1154.163+fips1 | < 5.15.0-1093.102+fips1 | < 6.8.0-1041.43+fips1
linux-gkeAll versions (No fix recorded) | < 5.15.0-1090.96 | < 6.8.0-1037.41
linux-gke-4.15All versions (No fix recorded)
linux-gke-5.15All versions (No fix recorded)
linux-gke-5.4All versions (No fix recorded)
linux-gkeopAll versions (No fix recorded) | < 5.15.0-1076.84 | < 6.8.0-1024.26
linux-gkeop-5.15All versions (No fix recorded)
linux-gkeop-5.4All versions (No fix recorded)
linux-hwe< 4.15.0-242.254~16.04.1 | All versions (No fix recorded)
linux-hwe-5.11All versions (No fix recorded)
linux-hwe-5.13All versions (No fix recorded)
linux-hwe-5.15< 5.15.0-157.167~20.04.1
linux-hwe-5.19All versions (No fix recorded)
linux-hwe-5.4< 5.4.0-222.242~18.04.1
linux-hwe-5.8All versions (No fix recorded)
linux-hwe-6.11All versions (No fix recorded)
linux-hwe-6.2All versions (No fix recorded)
linux-hwe-6.5All versions (No fix recorded)
linux-hwe-6.8< 6.8.0-85.85~22.04.1
linux-hwe-edgeAll versions (No fix recorded)
linux-ibm< 5.4.0-1097.102 | < 5.15.0-1087.90 | < 6.8.0-1038.38
linux-ibm-5.15< 5.15.0-1087.90~20.04.1
linux-ibm-5.4< 5.4.0-1097.102~18.04.1
linux-ibm-6.8< 6.8.0-1038.38~22.04.1
linux-intelAll versions (No fix recorded)
linux-intel-5.13All versions (No fix recorded)
linux-intel-iot-realtimeAll versions (No fix recorded) | < 5.15.0-1086.88
linux-intel-iotg< 5.15.0-1088.94
linux-intel-iotg-5.15< 5.15.0-1088.94~20.04.1
linux-iot< 5.4.0-1055.58
linux-kvmAll versions (No fix recorded) | < 4.15.0-1168.173 | < 5.4.0-1138.147 | < 5.15.0-1089.94
linux-lowlatency< 5.15.0-157.167 | < 6.8.0-85.85.1
linux-lowlatency-hwe-5.15< 5.15.0-157.167~20.04.1
linux-lowlatency-hwe-5.19All versions (No fix recorded)
linux-lowlatency-hwe-6.11All versions (No fix recorded)
linux-lowlatency-hwe-6.2All versions (No fix recorded)
linux-lowlatency-hwe-6.5All versions (No fix recorded)
linux-lowlatency-hwe-6.8< 6.8.0-85.85.1~22.04.1
linux-lts-xenialAll versions (No fix recorded)
linux-nvidia< 5.15.0-1088.89 | < 6.8.0-1040.43
linux-nvidia-6.11All versions (No fix recorded)
linux-nvidia-6.2All versions (No fix recorded)
linux-nvidia-6.5All versions (No fix recorded)
linux-nvidia-6.8< 6.8.0-1040.43~22.04.1
linux-nvidia-lowlatency< 6.8.0-1040.43.1
linux-nvidia-tegra< 5.15.0-1046.46 | < 6.8.0-1012.12
linux-nvidia-tegra-5.15< 5.15.0-1046.46~20.04.1
linux-nvidia-tegra-igx< 5.15.0-1035.35
linux-oemAll versions (No fix recorded)
linux-oem-5.10All versions (No fix recorded)
linux-oem-5.13All versions (No fix recorded)
linux-oem-5.14All versions (No fix recorded)
linux-oem-5.17All versions (No fix recorded)
linux-oem-5.6All versions (No fix recorded)
linux-oem-6.0All versions (No fix recorded)
linux-oem-6.1All versions (No fix recorded)
linux-oem-6.11All versions (No fix recorded)
linux-oem-6.14< 6.14.0-1013.13
linux-oem-6.5All versions (No fix recorded)
linux-oem-6.8All versions (No fix recorded)
linux-oracle< 4.15.0-1148.159~16.04.1 | < 4.15.0-1147.158 | < 5.4.0-1149.159 | < 5.15.0-1091.97 | < 6.8.0-1037.38
linux-oracle-5.0All versions (No fix recorded)
linux-oracle-5.11All versions (No fix recorded)
linux-oracle-5.13All versions (No fix recorded)
linux-oracle-5.15< 5.15.0-1091.97~20.04.1
linux-oracle-5.3All versions (No fix recorded)
linux-oracle-5.4< 5.4.0-1149.159~18.04.1
linux-oracle-5.8All versions (No fix recorded)
linux-oracle-6.14< 6.14.0-1014.14~24.04.1
linux-oracle-6.5All versions (No fix recorded)
linux-oracle-6.8< 6.8.0-1037.38~22.04.1
linux-raspi< 5.4.0-1134.147 | < 5.15.0-1087.90 | < 6.8.0-1040.44
linux-raspi-5.4< 5.4.0-1134.147~18.04.1
linux-raspi-realtimeAll versions (No fix recorded) | < 6.8.0-2031.32
linux-raspi2All versions (No fix recorded)
linux-realtimeAll versions (No fix recorded) | < 5.15.0-1093.102 | < 6.8.1-1035.36
linux-realtime-6.14< 6.14.0-1013.13~24.04.1
linux-realtime-6.8< 6.8.1-1035.36~22.04.1
linux-riscvAll versions (No fix recorded)
linux-riscv-5.11All versions (No fix recorded)
linux-riscv-5.15< 5.15.0-1088.92~20.04.1
linux-riscv-5.19All versions (No fix recorded)
linux-riscv-5.8All versions (No fix recorded)
linux-riscv-6.14< 6.14.0-33.33.1~24.04.1
linux-riscv-6.5All versions (No fix recorded)
linux-riscv-6.8< 6.8.0-86.87~22.04.1
linux-starfive-5.19All versions (No fix recorded)
linux-starfive-6.2All versions (No fix recorded)
linux-starfive-6.5All versions (No fix recorded)
linux-xilinx< 6.8.0-1018.19
linux-xilinx-zynqmp< 5.4.0-1069.73 | < 5.15.0-1057.61

Show all 145

Suse14 products

kernel-livepatch-MICRO-6-0_Update_9&distro=SUSE Linux Micro 6.0< 6-1.2
kernel-livepatch-MICRO-6-0_Update_9&distro=SUSE Linux Micro 6.1< 6-1.2
kernel-livepatch-MICRO-6-0-RT_Update_10&distro=SUSE Linux Micro 6.0< 5-1.1
kernel-livepatch-MICRO-6-0-RT_Update_10&distro=SUSE Linux Micro 6.1< 5-1.1
kernel-livepatch-SLE15-SP3_Update_58&distro=SUSE Linux Enterprise Live Patching 15 SP3< 6-150300.2.1

Show all 14

Debian2 products

linux< 6.1.147-1 | < 6.12.41-1 | < 6.16.3-1
debian_linuxEOL11.0

Linux2 products

linux≥ 462dbc9101acd38e92eda93c0726857517a24bbd, < aa7a22c4d678bf649fd3a1d27debec583563414d | ≥ 462dbc9101acd38e92eda93c0726857517a24bbd, < d841aa5518508ab195b6781ad0d73ee378d713dd | ≥ 462dbc9101acd38e92eda93c0726857517a24bbd, < c6df794000147a3a02f79984aada4ce83f8d0a1e | ≥ 462dbc9101acd38e92eda93c0726857517a24bbd, < 466e10194ab81caa2ee6a332d33ba16bcceeeba6 | ≥ 462dbc9101acd38e92eda93c0726857517a24bbd, < fbe48f06e64134dfeafa89ad23387f66ebca3527 | ≥ 462dbc9101acd38e92eda93c0726857517a24bbd, < a6d735100f602c830c16d69fb6d780eebd8c9ae1 | ≥ 462dbc9101acd38e92eda93c0726857517a24bbd, < c000a3a330d97f6c073ace5aa5faf94b9adb4b79 | ≥ 462dbc9101acd38e92eda93c0726857517a24bbd, < 5e28d5a3f774f118896aec17a3a20a9c5c9dfc64 | 3.8
linux_kernel≥ 3.8, < 5.4.297 | ≥ 5.5, < 5.10.241 | ≥ 5.11, < 5.15.190 | ≥ 5.16, < 6.1.147 | ≥ 6.2, < 6.6.100 | ≥ 6.7, < 6.12.40 | ≥ 6.13, < 6.15.8 | 6.16:rc1 | 6.16:rc2 | 6.16:rc3 | 6.16:rc4 | 6.16:rc5 | 6.16:rc6

4 vendors · 163 products