Answer in brief
CVE-2026-64354 records a Unknown severity vulnerability in bpf: Validate BTF repeated field counts before expansion. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. 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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=797d73ee232dd1833dec4824bc53a22032e97c1c <c5ff816d5f13900c3f1f3298cfcc61339e056e56 || >=797d73ee232dd1833dec4824bc53a22032e97c1c <cd407de2ef5dc70f1970b343ffaa16186340fdfd || >=797d73ee232dd1833dec4824bc53a22032e97c1c <ff77d013b737c0f77d925e2f2c59f0cf3d76bd35 || >=797d73ee232dd1833dec4824bc53a22032e97c1c <b9452b594fd3aecbfd4aa0a6a1f741330a37dab7 || 6f957d972feee9b385ea3ae6530310a84e55ba71 || >=6.11.6 <6.12 | c5ff816d5f13900c3f1f3298cfcc61339e056e56, cd407de2ef5dc70f1970b343ffaa16186340fdfd, ff77d013b737c0f77d925e2f2c59f0cf3d76bd35, b9452b594fd3aecbfd4aa0a6a1f741330a37dab7, 6.12 |
| Linux/Linuxgeneric | 6.12 | Not reported |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 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: bpf: Validate BTF repeated field counts before expansion btf_parse_struct_metas() walks user-supplied BTF during BPF_BTF_LOAD, and btf_repeat_fields() expands repeatable fields from array elements into the fixed BTF_FIELDS_MAX scratch array used by btf_parse_fields(). The remaining-capacity check performs the expanded field count calculation in u32. A malformed BTF can wrap that calculation, causing the check to pass even when the expanded field count exceeds the scratch array capacity. The following memcpy() can then write past the end of the array. Use checked addition and multiplication before copying repeated fields and reject impossible counts.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-64354 records a Unknown severity vulnerability in bpf: Validate BTF repeated field counts before expansion. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. 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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=797d73ee232dd1833dec4824bc53a22032e97c1c <c5ff816d5f13900c3f1f3298cfcc61339e056e56 || >=797d73ee232dd1833dec4824bc53a22032e97c1c <cd407de2ef5dc70f1970b343ffaa16186340fdfd || >=797d73ee232dd1833dec4824bc53a22032e97c1c <ff77d013b737c0f77d925e2f2c59f0cf3d76bd35 || >=797d73ee232dd1833dec4824bc53a22032e97c1c <b9452b594fd3aecbfd4aa0a6a1f741330a37dab7 || 6f957d972feee9b385ea3ae6530310a84e55ba71 || >=6.11.6 <6.12 | c5ff816d5f13900c3f1f3298cfcc61339e056e56, cd407de2ef5dc70f1970b343ffaa16186340fdfd, ff77d013b737c0f77d925e2f2c59f0cf3d76bd35, b9452b594fd3aecbfd4aa0a6a1f741330a37dab7, 6.12 |
| Linux/Linuxgeneric | 6.12 | Not reported |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 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: bpf: Validate BTF repeated field counts before expansion btf_parse_struct_metas() walks user-supplied BTF during BPF_BTF_LOAD, and btf_repeat_fields() expands repeatable fields from array elements into the fixed BTF_FIELDS_MAX scratch array used by btf_parse_fields(). The remaining-capacity check performs the expanded field count calculation in u32. A malformed BTF can wrap that calculation, causing the check to pass even when the expanded field count exceeds the scratch array capacity. The following memcpy() can then write past the end of the array. Use checked addition and multiplication before copying repeated fields and reject impossible counts.
Quoted source text, attributed separately from HOL analysis.