CVE-2025-38280 Information

Jul 12, 2025 cve

Description

In the Linux kernel the following vulnerability has been resolved:

bpf: Avoid __bpf_prog_ret0_warn when jit fails

syzkaller reported an issue:

WARNING: CPU: 3 PID: 217 at kernel/bpf/core.c:2357 __bpf_prog_ret0_warn+0xa/0x20 kernel/bpf/core.c:2357 Modules linked in: CPU: 3 UID: 0 PID: 217 Comm: kworker/u32:6 Not tainted 6.15.0-rc4-syzkaller-00040-g8bac8898fe39 RIP: 0010:__bpf_prog_ret0_warn+0xa/0x20 kernel/bpf/core.c:2357 Call Trace: bpf_dispatcher_nop_func include/linux/bpf.h:1316 [inline] __bpf_prog_run include/linux/filter.h:718 [inline] bpf_prog_run include/linux/filter.h:725 [inline] cls_bpf_classify+0x74a/0x1110 net/sched/cls_bpf.c:105 …

When creating bpf program ‘fp->jit_requested’ depends on bpf_jit_enable. This issue is triggered because of CONFIG_BPF_JIT_ALWAYS_ON is not set and bpf_jit_enable is set to 1 causing the arch to attempt JIT the prog but jit failed due to FAULT_INJECTION. As a result incorrectly treats the program as valid when the program runs it calls __bpf_prog_ret0_warn and triggers the WARN_ON_ONCE(1).

Reference

https://git.kernel.org/stable/c/0b9bb52796b239de6792d0d68cdc6eb505ebff96 https://git.kernel.org/stable/c/2bc6dffb4b72d53d6a6ada510269bf548c3f7ae0 https://git.kernel.org/stable/c/6f639c25bfad17d9fd7379ab91ff9678ea9aac85 https://git.kernel.org/stable/c/86bc9c742426a16b52a10ef61f5b721aecca2344 https://git.kernel.org/stable/c/e7fb4ebee6e900899d2b2e5852c3e2eafcbcad66 https://git.kernel.org/stable/c/ef92b96530d1731d9ac167bc7c193c683cd78fff

CNNVD-202507-1403 (Published: 2025-07-10)

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