Answer in brief
CVE-2026-63864 records a Unknown severity vulnerability in bpf: Propagate error from visit_tailcall_insn. 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 | >=e40f5a6bf88a781d5f81bc6b8aab9ac31d8c98dd <945816e63c8677cf4bfde963a0774432ce8afc85 || >=e40f5a6bf88a781d5f81bc6b8aab9ac31d8c98dd <6bd96e40f31dde8f8cd79772b4df0f171cf8a915 | 945816e63c8677cf4bfde963a0774432ce8afc85, 6bd96e40f31dde8f8cd79772b4df0f171cf8a915 |
| Linux/Linuxgeneric | 6.19 | Not reported |
Published upstream
Jul 19, 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: Propagate error from visit_tailcall_insn Commit e40f5a6bf88a ("bpf: correct stack liveness for tail calls") added visit_tailcall_insn() but did not check its return value.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-63864 records a Unknown severity vulnerability in bpf: Propagate error from visit_tailcall_insn. 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 | >=e40f5a6bf88a781d5f81bc6b8aab9ac31d8c98dd <945816e63c8677cf4bfde963a0774432ce8afc85 || >=e40f5a6bf88a781d5f81bc6b8aab9ac31d8c98dd <6bd96e40f31dde8f8cd79772b4df0f171cf8a915 | 945816e63c8677cf4bfde963a0774432ce8afc85, 6bd96e40f31dde8f8cd79772b4df0f171cf8a915 |
| Linux/Linuxgeneric | 6.19 | Not reported |
Published upstream
Jul 19, 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: Propagate error from visit_tailcall_insn Commit e40f5a6bf88a ("bpf: correct stack liveness for tail calls") added visit_tailcall_insn() but did not check its return value.
Quoted source text, attributed separately from HOL analysis.