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Vulnerability · Published Apr 18, 2025 · Assigned by Linux

CVE-2025-37893LoongArch: BPF: Fix off-by-one error in build_prologue()

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 0.3% (higher than 21% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.3%top 79.5% 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: LoongArch: BPF: Fix off-by-one error in build_prologue() Vincent reported that running BPF progs with tailcalls on LoongArch causes kernel hard lockup. Debugging the issues shows that the JITed image missing a jirl instruction at the end of the epilogue. There are two passes in JIT compiling, the first pass set the flags and the second pass generates JIT code based on those flags. With BPF progs mixing bpf2bpf and tailcalls, build_prologue() generates N insns in the first pass and then generates N+1 insns in the second pass. This makes epilogue_offset off by one and we will jump to some unexpected insn and cause lockup. Fix this by inserting a nop insn.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linuxno fix listedDEBIAN-CVE-2025-37893
Debian:13linux6.12.25-1DEBIAN-CVE-2025-37893
Debian:14linux6.12.25-1DEBIAN-CVE-2025-37893
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2025-37893
Ubuntu:24.04:LTSlinux-nvidia-6.116.11.0-1012.12UBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2025-37893
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-37893
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2025-37893
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2025-37893
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1018.19UBUNTU-CVE-2025-37893

Affected products (as reported)

VendorProductVersions
Linux Linux 5dc615520c4dfb358245680f1904bad61116648e – before b3ffad2f02db4aace6799fe0049508b8925eae455dc615520c4dfb358245680f1904bad61116648e – before 205a2182c51ffebaef54d643e3745e720cded08b5dc615520c4dfb358245680f1904bad61116648e – before c74d95a5679741ef428974ab788f5b0758dc78ae5dc615520c4dfb358245680f1904bad61116648e – before 48b904de2408af5f936f0e03f48dfcddeab58aa05dc615520c4dfb358245680f1904bad61116648e – before 7e2586991e36663c9bc48c828b83eab180ad30a9
Linux Linux 6.1

Weakness: CWE-193 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References