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Vulnerability · Published Oct 28, 2025 · Assigned by Linux

CVE-2025-40078bpf: Explicitly check accesses to bpf_sock_addr

Unrated

In plain English

A 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 16% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS )–Not rated
Exploit odds (30 days)0.2%top 84.2% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: bpf: Explicitly check accesses to bpf_sock_addr Syzkaller found a kernel warning on the following sock_addr program: 0: r0 = 0 1: r2 = *(u32 *)(r1 +60) 2: exit which triggers: verifier bug: error during ctx access conversion (0) This is happening because offset 60 in bpf_sock_addr corresponds to an implicit padding of 4 bytes, right after msg_src_ip4. Access to this padding isn't rejected in sock_addr_is_valid_access and it thus later fails to convert the access. This patch fixes it by explicitly checking the various fields of bpf_sock_addr in sock_addr_is_valid_access. I checked the other ctx structures and is_valid_access functions and didn't find any other similar cases. Other cases of (properly handled) padding are covered in new tests in a subsequent patch.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.158-1DEBIAN-CVE-2025-40078
Debian:13linux6.12.57-1DEBIAN-CVE-2025-40078
Debian:14linux6.17.6-1DEBIAN-CVE-2025-40078
Ubuntu:22.04:LTSlinux5.15.0-170.180UBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux6.8.0-106.106UBUNTU-CVE-2025-40078
Ubuntu:25.10linux6.17.0-14.14UBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-aws5.15.0-1100.107UBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-aws6.8.0-1050.53UBUNTU-CVE-2025-40078
Ubuntu:25.10linux-aws6.17.0-1007.7UBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-aws-6.176.17.0-1007.7~24.04.1UBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1050.53~22.04.1UBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-azure5.15.0-1109.118UBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-azure6.8.0-1051.57UBUNTU-CVE-2025-40078
Ubuntu:25.10linux-azure6.17.0-1008.8UBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1051.57~22.04.1UBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1109.118.1UBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-azure-fde6.8.0-1058.65UBUNTU-CVE-2025-40078
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-azure-fde-6.86.8.0-1058.65~22.04.1UBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-gcp5.15.0-1100.109UBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-gcp6.8.0-1052.55UBUNTU-CVE-2025-40078
Ubuntu:25.10linux-gcp6.17.0-1007.7UBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-gcp-6.176.17.0-1008.8~24.04.1UBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1052.55~22.04.1UBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-gke5.15.0-1096.102UBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-gke6.8.0-1048.53UBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1083.91UBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1035.38UBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-106.106~22.04.1UBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-ibm5.15.0-1094.97UBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-ibm6.8.0-1049.49UBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1049.49~22.04.1UBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1095.101UBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-kvm5.15.0-1092.97UBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-170.180UBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-106.106.1UBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-106.106.1~22.04.1UBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1095.96UBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1049.52UBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-nvidia-6.176.17.0-1008.8UBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1049.52~22.04.1UBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1049.52.1UBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1052.52UBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1020.20UBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1041.41UBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-oem-6.176.17.0-1011.11UBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-oracle5.15.0-1097.103UBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-oracle6.8.0-1047.48UBUNTU-CVE-2025-40078
Ubuntu:25.10linux-oracle6.17.0-1007.7UBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-oracle-6.176.17.0-1007.7~24.04.1UBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1047.48~22.04.1UBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-raspi5.15.0-1097.100UBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-raspi6.8.0-1050.54UBUNTU-CVE-2025-40078
Ubuntu:25.10linux-raspi6.17.0-1008.8UBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-40078
Ubuntu:25.10linux-realtime6.17.0-1006.7UBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-40078
Ubuntu:25.10linux-riscv6.17.0-14.14.1UBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-106.106~22.04.1UBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2025-40078
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1028.29UBUNTU-CVE-2025-40078
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1064.68UBUNTU-CVE-2025-40078

Affected products (as reported)

VendorProductVersions
Linux Linux 1cedee13d25ab118d325f95588c1a084e9317229 – before de44cdc50d2dce8718cb57deddf9cf1be9a7759f1cedee13d25ab118d325f95588c1a084e9317229 – before 76e04bbb4296fb6eac084dbfc27e02ccc744db3e1cedee13d25ab118d325f95588c1a084e9317229 – before 6d8b1a21fd5c34622b0c3893c61e4a38d8ba53ec1cedee13d25ab118d325f95588c1a084e9317229 – before 4f00858cd9bbbdf67159e28b85a8ca9e77c836221cedee13d25ab118d325f95588c1a084e9317229 – before cdeafacb4f9ff261a96baef519e29480fd7b10191cedee13d25ab118d325f95588c1a084e9317229 – before fe9d33f0470350558cb08cecb54cf2267b3a45d21cedee13d25ab118d325f95588c1a084e9317229 – before ad8b4fe5617e3c85fc23267f02500c4f3bf0ff691cedee13d25ab118d325f95588c1a084e9317229 – before 6fabca2fc94d33cdf7ec102058983b086293395f
Linux Linux 4.18

References