Description
In the Linux kernel, the following vulnerability has been resolved:
x86/cpu/hygon: Add missing resctrl_cpu_detect() in bsp_init helper
Since
923f3a2b48bd ("x86/resctrl: Query LLC monitoring properties once during boot")
resctrl_cpu_detect() has been moved from common CPU initialization code to the vendor-specific BSP init helper, while Hygon didn't put that call in their code.
This triggers a division by zero fault during early booting stage on our machines with X86_FEATURE_CQM* supported, where get_rdt_mon_resources() tries to calculate mon_l3_config with uninitialized boot_cpu_data.x86_cache_occ_scale.
Add the missing resctrl_cpu_detect() in the Hygon BSP init helper.
[ bp: Massage commit message. ]
Metrics
CVSS 3.1 5.5/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HAffected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9, < 62f12cde10118253348a7540e85606869bd69432; >= 923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9, < 873f32201df8876bdb2563e3187e79149427cab4; >= 923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9, < fb81222c1559f89bfe3aa1010f6d112531d55353; >= 923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9, < 7207923d8453ebfb35667c1736169f2dd796772e; >= 923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9, < a9e5924daa954c9f585c1ca00358afe71d6781c4; >= 923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9, < d23264c257a70dbe021b43b3bc2ee16134cd2c69; >= 923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9, < d8df126349dad855cdfedd6bbf315bad2e901c2f |
| Linux | Linux | 5.8 |
| Siemens | SIMATIC CN 4100 | < V5.0 |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) | >= V3.1.6, < * |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) | >= V3.1.7, < * |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) | >= V3.1.6, < * |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) | >= V3.1.7, < * |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) | >= V3.1.6, < * |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) | >= V3.1.7, < * |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) | >= V3.1.6, < * |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) | >= V3.1.7, < * |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) | >= V3.1.6, < * |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) | >= V3.1.7, < * |
References
- https://git.kernel.org/stable/c/62f12cde10118253348a7540e85606869bd69432Patch
- https://git.kernel.org/stable/c/7207923d8453ebfb35667c1736169f2dd796772ePatch
- https://git.kernel.org/stable/c/873f32201df8876bdb2563e3187e79149427cab4Patch
- https://git.kernel.org/stable/c/a9e5924daa954c9f585c1ca00358afe71d6781c4Patch
- https://git.kernel.org/stable/c/d23264c257a70dbe021b43b3bc2ee16134cd2c69Patch
- https://git.kernel.org/stable/c/d8df126349dad855cdfedd6bbf315bad2e901c2fPatch
- https://git.kernel.org/stable/c/fb81222c1559f89bfe3aa1010f6d112531d55353Patch
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlThird Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-032379.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
Timeline
- Published
- Sep 5, 2025
- Last modified
- Nov 10, 2026
- NVD status
- Modified