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).
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HAffected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= fa9dd599b4dae841924b022768354cfde9affecb, < e7fb4ebee6e900899d2b2e5852c3e2eafcbcad66; >= fa9dd599b4dae841924b022768354cfde9affecb, < ef92b96530d1731d9ac167bc7c193c683cd78fff; >= fa9dd599b4dae841924b022768354cfde9affecb, < 6f639c25bfad17d9fd7379ab91ff9678ea9aac85; >= fa9dd599b4dae841924b022768354cfde9affecb, < 2bc6dffb4b72d53d6a6ada510269bf548c3f7ae0; >= fa9dd599b4dae841924b022768354cfde9affecb, < 0b9bb52796b239de6792d0d68cdc6eb505ebff96; >= fa9dd599b4dae841924b022768354cfde9affecb, < 86bc9c742426a16b52a10ef61f5b721aecca2344; 5124abda3060e2eab506fb14a27acadee3c3e396; 234646dcfc5f531c74ab20595e89eacd62e3611f; >= 4.9.190, < 4.10; >= 4.14.140, < 4.15 |
| Linux | Linux | 4.16 |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP | >= V3.1.5, < * |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP | >= V3.1.5, < * |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP | >= V3.1.5, < * |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP | >= V3.1.5, < * |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP | >= V3.1.5, < * |
References
- https://git.kernel.org/stable/c/0b9bb52796b239de6792d0d68cdc6eb505ebff96Patch
- https://git.kernel.org/stable/c/2bc6dffb4b72d53d6a6ada510269bf548c3f7ae0Patch
- https://git.kernel.org/stable/c/6f639c25bfad17d9fd7379ab91ff9678ea9aac85Patch
- https://git.kernel.org/stable/c/86bc9c742426a16b52a10ef61f5b721aecca2344Patch
- https://git.kernel.org/stable/c/e7fb4ebee6e900899d2b2e5852c3e2eafcbcad66Patch
- https://git.kernel.org/stable/c/ef92b96530d1731d9ac167bc7c193c683cd78fffPatch
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlMailing List, Third Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
Timeline
- Published
- Jul 10, 2025
- Last modified
- Nov 5, 2026
- NVD status
- Modified