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Vulnerability · Published Jul 3, 2025 · Assigned by Linux

CVE-2025-38108net_sched: red: fix a race in __red_change()

High 7.8

In plain English

A high-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 5% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.2%top 94.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: net_sched: red: fix a race in __red_change() Gerrard Tai reported a race condition in RED, whenever SFQ perturb timer fires at the wrong time. The race is as follows: CPU 0 CPU 1 [1]: lock root [2]: qdisc_tree_flush_backlog() [3]: unlock root | | [5]: lock root | [6]: rehash | [7]: qdisc_tree_reduce_backlog() | [4]: qdisc_put() This can be abused to underflow a parent's qlen. Calling qdisc_purge_queue() instead of qdisc_tree_flush_backlog() should fix the race, because all packets will be purged from the qdisc before releasing the lock.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.147-1DEBIAN-CVE-2025-38108
Debian:13linux6.12.35-1DEBIAN-CVE-2025-38108
Debian:14linux6.12.35-1DEBIAN-CVE-2025-38108
Ubuntu:22.04:LTSlinux5.15.0-156.166USN-7774-1
Ubuntu:22.04:LTSlinux5.15.0-156.166UBUNTU-CVE-2025-38108
Ubuntu:24.04:LTSlinux6.8.0-100.100UBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-aws5.15.0-1092.99USN-7774-1
Ubuntu:22.04:LTSlinux-aws5.15.0-1092.99UBUNTU-CVE-2025-38108
Ubuntu:24.04:LTSlinux-aws6.8.0-1046.49UBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2025-38108
Ubuntu:24.04:LTSlinux-aws-6.146.14.0-1013.13~24.04.1UBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1046.49~22.04.1UBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-azure5.15.0-1096.105USN-7775-2
Ubuntu:22.04:LTSlinux-azure5.15.0-1096.105UBUNTU-CVE-2025-38108
Ubuntu:24.04:LTSlinux-azure6.8.0-1046.52UBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2025-38108
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1051.57~22.04.1UBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1096.105.1UBUNTU-CVE-2025-38108
Ubuntu:24.04:LTSlinux-azure-fde6.8.0-1046.53UBUNTU-CVE-2025-38108
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-azure-fde-6.86.8.0-1046.53~22.04.1UBUNTU-CVE-2025-38108
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2025-38108
Ubuntu:24.04:LTSlinux-azure-nvidia-6.146.14.0-1007.7UBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-gcp5.15.0-1092.101USN-7774-1
Ubuntu:22.04:LTSlinux-gcp5.15.0-1092.101UBUNTU-CVE-2025-38108
Ubuntu:24.04:LTSlinux-gcp6.8.0-1047.50UBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2025-38108
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2025-38108
Ubuntu:24.04:LTSlinux-gcp-6.146.14.0-1016.17~24.04.1UBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1047.50~22.04.2UBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-gke5.15.0-1089.95USN-7774-1
Ubuntu:22.04:LTSlinux-gke5.15.0-1089.95UBUNTU-CVE-2025-38108
Ubuntu:24.04:LTSlinux-gke6.8.0-1043.48UBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1075.83USN-7774-1
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1075.83UBUNTU-CVE-2025-38108
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1030.33UBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2025-38108
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-100.100~22.04.1UBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-ibm5.15.0-1086.89UBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-ibm5.15.0-1086.89USN-7774-1
Ubuntu:24.04:LTSlinux-ibm6.8.0-1044.44UBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1044.44~22.04.1UBUNTU-CVE-2025-38108
Ubuntu:24.04:LTSlinux-intelno fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1087.93UBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1087.93USN-7774-1
Ubuntu:22.04:LTSlinux-kvm5.15.0-1088.93UBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-kvm5.15.0-1088.93USN-7774-4
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-156.166UBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-156.166USN-7774-1
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-100.100.1UBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2025-38108
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-100.100.1~22.04.1UBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1087.88USN-7774-1
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1087.88UBUNTU-CVE-2025-38108
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1046.49UBUNTU-CVE-2025-38108
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1046.49~22.04.1UBUNTU-CVE-2025-38108
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1046.49.1UBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1045.45UBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1045.45USN-7774-1
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1020.20UBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1034.34UBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1034.34USN-7774-5
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2025-38108
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2025-38108
Ubuntu:24.04:LTSlinux-oem-6.146.14.0-1012.12UBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2025-38108
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-oracle5.15.0-1090.96UBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-oracle5.15.0-1090.96USN-7774-1
Ubuntu:24.04:LTSlinux-oracle6.8.0-1043.44UBUNTU-CVE-2025-38108
Ubuntu:24.04:LTSlinux-oracle-6.146.14.0-1013.13~24.04.1UBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1043.44~22.04.1UBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-raspi5.15.0-1086.89USN-7774-1
Ubuntu:22.04:LTSlinux-raspi5.15.0-1086.89UBUNTU-CVE-2025-38108
Ubuntu:24.04:LTSlinux-raspi6.8.0-1047.51UBUNTU-CVE-2025-38108
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-38108
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-38108
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2025-38108
Ubuntu:24.04:LTSlinux-riscv-6.146.14.0-32.32.1~24.04.1UBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-100.100~22.04.1UBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2025-38108
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1023.24UBUNTU-CVE-2025-38108
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1056.60USN-7774-1
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1056.60UBUNTU-CVE-2025-38108

Affected products (as reported)

VendorProductVersions
Linux Linux 0c8d13ac96070000da33f394f45e9c19638483c5 – before 2790c4ec481be45a80948d059cd7c9a06bc374930c8d13ac96070000da33f394f45e9c19638483c5 – before a1bf6a4e9264a685b0e642994031f9c5aad724140c8d13ac96070000da33f394f45e9c19638483c5 – before 110a47efcf23438ff8d31dbd9c854fae2a48bf980c8d13ac96070000da33f394f45e9c19638483c5 – before f569984417a4e12c67366e69bdcb752970de921d0c8d13ac96070000da33f394f45e9c19638483c5 – before 2a71924ca4af59ffc00f0444732b6cd54b153d0e0c8d13ac96070000da33f394f45e9c19638483c5 – before 4b755305b2b0618e857fdadb499365b5f2e478d10c8d13ac96070000da33f394f45e9c19638483c5 – before 444ad445df5496a785705019268a8a84b84484bb0c8d13ac96070000da33f394f45e9c19638483c5 – before 85a3e0ede38450ea3053b8c45d28cf55208409b8
Linux Linux 5.0

References