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

EPSS 0.06% · P19
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I. Basic Information for CVE-2025-37893

Vulnerability Information
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Vulnerability Title
LoongArch: BPF: Fix off-by-one error in build_prologue()
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于LoongArch架构BPF的build_prologue函数存在差一错误。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux 5dc615520c4dfb358245680f1904bad61116648e ~ b3ffad2f02db4aace6799fe0049508b8925eae45 -
LinuxLinux 6.1 -

II. Public POCs for CVE-2025-37893

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III. Intelligence Information for CVE-2025-37893

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Same Patch Batch · Linux · 2025-04-18 · 23 CVEs total

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CVE-2025-39989x86/mce: use is_copy_from_user() to determine copy-from-user context
CVE-2025-40014objtool, spi: amd: Fix out-of-bounds stack access in amd_set_spi_freq()
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Showing top 20 of 23 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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