CVE-2025-38280

bpf: Avoid __bpf_prog_ret0_warn when jit fails

State: Published
Severity: Not scored
Published: Jul 10, 2025
Updated: Oct 15, 2026
Reserved: Apr 16, 2025

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: <TASK> 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).

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	fa9dd599b4dae841924b022768354cfde9affecb to before e7fb4ebee6e900899d2b2e5852c3e2eafcbcad66Affected fa9dd599b4dae841924b022768354cfde9affecb to before ef92b96530d1731d9ac167bc7c193c683cd78fffAffected fa9dd599b4dae841924b022768354cfde9affecb to before 6f639c25bfad17d9fd7379ab91ff9678ea9aac85Affected fa9dd599b4dae841924b022768354cfde9affecb to before 2bc6dffb4b72d53d6a6ada510269bf548c3f7ae0Affected fa9dd599b4dae841924b022768354cfde9affecb to before 0b9bb52796b239de6792d0d68cdc6eb505ebff96Affected fa9dd599b4dae841924b022768354cfde9affecb to before 86bc9c742426a16b52a10ef61f5b721aecca2344Affected 5124abda3060e2eab506fb14a27acadee3c3e396Affected 234646dcfc5f531c74ab20595e89eacd62e3611fAffected 4.9.190 to before 4.10Affected 4.14.140 to before 4.15Affected
LinuxLinux	4.16Affected before 4.16Not affected 5.15.186 through 5.15.Not affected 6.1.142 through 6.1.Not affected 6.6.94 through 6.6.Not affected 6.12.34 through 6.12.Not affected 6.15.3 through 6.15.*Not affected 6.16 and laterNot affected

Product

Versions

LinuxLinux

fa9dd599b4dae841924b022768354cfde9affecb to before e7fb4ebee6e900899d2b2e5852c3e2eafcbcad66Affected
fa9dd599b4dae841924b022768354cfde9affecb to before ef92b96530d1731d9ac167bc7c193c683cd78fffAffected
fa9dd599b4dae841924b022768354cfde9affecb to before 6f639c25bfad17d9fd7379ab91ff9678ea9aac85Affected
fa9dd599b4dae841924b022768354cfde9affecb to before 2bc6dffb4b72d53d6a6ada510269bf548c3f7ae0Affected
fa9dd599b4dae841924b022768354cfde9affecb to before 0b9bb52796b239de6792d0d68cdc6eb505ebff96Affected
fa9dd599b4dae841924b022768354cfde9affecb to before 86bc9c742426a16b52a10ef61f5b721aecca2344Affected
5124abda3060e2eab506fb14a27acadee3c3e396Affected
234646dcfc5f531c74ab20595e89eacd62e3611fAffected
4.9.190 to before 4.10Affected
4.14.140 to before 4.15Affected

LinuxLinux

4.16Affected
before 4.16Not affected
5.15.186 through 5.15.*Not affected
6.1.142 through 6.1.*Not affected
6.6.94 through 6.6.*Not affected
6.12.34 through 6.12.*Not affected
6.15.3 through 6.15.*Not affected
6.16 and laterNot affected

References

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