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Vulnerability · Published Jan 31, 2025 · Assigned by Linux

CVE-2025-21683bpf: Fix bpf_sk_select_reuseport() memory leak

Medium 5.5

In plain English

A medium-severity memory leak 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 13% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.2%top 86.9% 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: bpf: Fix bpf_sk_select_reuseport() memory leak As pointed out in the original comment, lookup in sockmap can return a TCP ESTABLISHED socket. Such TCP socket may have had SO_ATTACH_REUSEPORT_EBPF set before it was ESTABLISHED. In other words, a non-NULL sk_reuseport_cb does not imply a non-refcounted socket. Drop sk's reference in both error paths. unreferenced object 0xffff888101911800 (size 2048): comm "test_progs", pid 44109, jiffies 4297131437 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 80 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace (crc 9336483b): __kmalloc_noprof+0x3bf/0x560 __reuseport_alloc+0x1d/0x40 reuseport_alloc+0xca/0x150 reuseport_attach_prog+0x87/0x140 sk_reuseport_attach_bpf+0xc8/0x100 sk_setsockopt+0x1181/0x1990 do_sock_setsockopt+0x12b/0x160 __sys_setsockopt+0x7b/0xc0 __x64_sys_setsockopt+0x1b/0x30 do_syscall_64+0x93/0x180 entry_SYSCALL_64_after_hwframe+0x76/0x7e

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.128-1DEBIAN-CVE-2025-21683
Debian:13linux6.12.11-1DEBIAN-CVE-2025-21683
Debian:14linux6.12.11-1DEBIAN-CVE-2025-21683
Ubuntu:22.04:LTSlinux5.15.0-135.146UBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux6.8.0-62.65USN-7595-1
Ubuntu:24.04:LTSlinux6.8.0-62.65UBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-aws5.15.0-1080.87UBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux-aws6.8.0-1030.32USN-7595-1
Ubuntu:24.04:LTSlinux-aws6.8.0-1030.32UBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1030.32~22.04.1UBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1030.32~22.04.1USN-7595-1
Ubuntu:22.04:LTSlinux-azure5.15.0-1084.93UBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux-azure6.8.0-1030.35UBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux-azure6.8.0-1030.35USN-7596-1
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux-azure-6.116.11.0-1013.13~24.04.1USN-7448-1
Ubuntu:24.04:LTSlinux-azure-6.116.11.0-1013.13~24.04.1UBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1030.35~22.04.1USN-7596-1
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1030.35~22.04.1UBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1084.93.1UBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux-azure-nvidia6.8.0-1018.19USN-7596-2
Ubuntu:24.04:LTSlinux-azure-nvidia6.8.0-1018.19UBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-gcp5.15.0-1079.88UBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux-gcp6.8.0-1031.33UBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux-gcp6.8.0-1031.33USN-7595-5
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux-gcp-6.116.11.0-1013.13~24.04.1UBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1031.33~22.04.1USN-7595-5
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1031.33~22.04.1UBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-gke5.15.0-1077.83UBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux-gke6.8.0-1026.30UBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux-gke6.8.0-1026.30USN-7595-1
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1062.70UBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1013.15UBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1013.15USN-7595-1
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux-hwe-6.116.11.0-24.24~24.04.1UBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux-hwe-6.116.11.0-24.24~24.04.1USN-7445-1
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-64.67~22.04.1UBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-ibm5.15.0-1072.75UBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux-ibm6.8.0-1027.27USN-7595-1
Ubuntu:24.04:LTSlinux-ibm6.8.0-1027.27UBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1027.27~22.04.1UBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-intel-iot-realtime5.15.0-1073.75UBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1075.81UBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-kvm5.15.0-1076.81UBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-135.146UBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-62.65.1USN-7595-1
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-62.65.1UBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.116.11.0-1012.13~24.04.1USN-7445-1
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.116.11.0-1012.13~24.04.1UBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-62.65.1~22.04.1USN-7595-1
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-62.65.1~22.04.1UBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1074.75UBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1029.32UBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1029.32USN-7595-1
Ubuntu:24.04:LTSlinux-nvidia-6.116.11.0-1007.7UBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1029.32~22.04.1USN-7595-1
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1029.32~22.04.1UBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1029.32.1USN-7595-1
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1029.32.1UBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1033.33UBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1008.8UBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1021.21UBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux-oem-6.116.11.0-1020.20USN-7445-1
Ubuntu:24.04:LTSlinux-oem-6.116.11.0-1020.20UBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux-oem-6.86.8.0-1029.29UBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux-oem-6.86.8.0-1029.29USN-7595-1
Ubuntu:22.04:LTSlinux-oracle5.15.0-1077.83UBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux-oracle6.8.0-1027.28UBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux-oracle6.8.0-1027.28USN-7595-4
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1027.28~22.04.1UBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1027.28~22.04.1USN-7595-4
Ubuntu:22.04:LTSlinux-raspi5.15.0-1074.77UBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux-raspi6.8.0-1029.33UBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux-raspi6.8.0-1029.33USN-7595-4
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-62.65~22.04.1UBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2025-21683
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1017.18UBUNTU-CVE-2025-21683
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1044.48UBUNTU-CVE-2025-21683

Affected products (as reported)

VendorProductVersions
Linux Linux 64d85290d79c0677edb5a8ee2295b36c022fa5df – before bb36838dac7bb334a3f3d7eb29875593ec9473fc64d85290d79c0677edb5a8ee2295b36c022fa5df – before 0ab52a8ca6e156a64c51b5e7456cac9a0ebfd9bf64d85290d79c0677edb5a8ee2295b36c022fa5df – before d0a3b3d1176d39218b8edb2a2d03164942ab9ccd64d85290d79c0677edb5a8ee2295b36c022fa5df – before b02e70be498b138e9c21701c2f33f4018ca7cd5e64d85290d79c0677edb5a8ee2295b36c022fa5df – before cccd51dd22574216e64e5d205489e634f86999f364d85290d79c0677edb5a8ee2295b36c022fa5df – before b3af60928ab9129befa65e6df0310d27300942bf
Linux Linux 5.8

Weakness: CWE-401 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References