CVE - CVE-2025-37893

CVE-ID
CVE-2025-37893	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/205a2182c51ffebaef54d643e3745e720cded08b URL:https://git.kernel.org/stable/c/205a2182c51ffebaef54d643e3745e720cded08b MISC:https://git.kernel.org/stable/c/48b904de2408af5f936f0e03f48dfcddeab58aa0 URL:https://git.kernel.org/stable/c/48b904de2408af5f936f0e03f48dfcddeab58aa0 MISC:https://git.kernel.org/stable/c/7e2586991e36663c9bc48c828b83eab180ad30a9 URL:https://git.kernel.org/stable/c/7e2586991e36663c9bc48c828b83eab180ad30a9 MISC:https://git.kernel.org/stable/c/b3ffad2f02db4aace6799fe0049508b8925eae45 URL:https://git.kernel.org/stable/c/b3ffad2f02db4aace6799fe0049508b8925eae45 MISC:https://git.kernel.org/stable/c/c74d95a5679741ef428974ab788f5b0758dc78ae URL:https://git.kernel.org/stable/c/c74d95a5679741ef428974ab788f5b0758dc78ae MISC:https://git.kernel.org/stable/c/e9ccb262b39ab01a5ac2e485b7996b8498e7b373 URL:https://git.kernel.org/stable/c/e9ccb262b39ab01a5ac2e485b7996b8498e7b373
Assigning CNA
kernel.org
Date Record Created
20250416	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20250416)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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