# CVE-2026-63864: linux: In the Linux kernel, the following vulnerability has been resolved:  bpf: Propagate error from visit_tailcall_insn  C...

CVE-2026-63864 is fixed in linux on 1 platform by DEBIAN-CVE-2026-63864 (version 7.0.10-1), released July 20, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-63864
- Priority: High
- CVSS: 8.4 (high)
- EPSS: 0.0018
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 19, 2026

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.0.10-1 | [DEBIAN-CVE-2026-63864](https://patchblox.com/security/data/fix/linux/debian-cve-2026-63864.md) | Jul 20, 2026 |

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Data as of 2026-11-09T19:38:12Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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