Answer in brief
CVE-2026-64413 records a High severity (CVSS 7.0) vulnerability in netfilter: ebtables: zero chainstack array. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:2.6.12:-:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:2.6.12:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:2.6.12:rc3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:2.6.12:rc4:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:2.6.12:rc5:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.2:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.2:rc2:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2ade612967e2cdfb9290ebcb773f302c82f311fa || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <42bef500d07b5769d916e9122a3e3fa3fd2245ef || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fc7f105451044501a50cfd530cfa3b472c54acbc || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9e6c5169db423e51dcc66a73fd15409c0d38e088 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <29bf41a9b59aff9f6197df58641a00037d567ca8 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9f74d28e903fa4fdf82f870d0aeadddc8196e41c || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5ee856e4208acafaaaf7b84824d39b78c21345d6 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cbfe53599eebffd188938ab6774cc41794f6f9d5 | 2ade612967e2cdfb9290ebcb773f302c82f311fa, 42bef500d07b5769d916e9122a3e3fa3fd2245ef, fc7f105451044501a50cfd530cfa3b472c54acbc, 9e6c5169db423e51dcc66a73fd15409c0d38e088, 29bf41a9b59aff9f6197df58641a00037d567ca8, 9f74d28e903fa4fdf82f870d0aeadddc8196e41c, 5ee856e4208acafaaaf7b84824d39b78c21345d6, cbfe53599eebffd188938ab6774cc41794f6f9d5 |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: netfilter: ebtables: zero chainstack array sashiko reports: looking at ebtables table translation, could a sparse cpu_possible_mask lead to an uninitialized pointer free? If cpu_possible_mask is sparse (for example, CPU 0 and CPU 2 are possible, but CPU 1 is not), the allocation loop skips CPU 1. If vmalloc_node() fails at CPU 2, the cleanup loop will blindly decrement and call vfree() on newinfo->chainstack[1]. Not a real-world bug, such allocation isn't expected to fail in the first place.
Quoted source text, attributed separately from HOL analysis.