LoongArch: BPF: Refactor jump offset calculation in tail call
Summary
| CVE | CVE-2026-89906 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-16 11:16:59 UTC |
| Updated | 2026-09-16 15:18:16 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: LoongArch: BPF: Refactor jump offset calculation in tail call The old macro-based jmp_offset calculation derives the jump distance from a stale prior-pass code stride, which can lead to wrong branch offsets and soft lockups under extra JIT passes. Fix this by calculating the offset directly on the absolute target: "ctx->offset[insn + 1] - ctx->idx". To avoid a false 16-bit range check abort during size estimation, add a "ctx->image == NULL" guard to inject a safe dummy offset. |
Risk And Classification
Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | Secondary | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | DECLARED | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected cd39d9e6b7e4c58fa77783e7aedf7ada51d02ea3 882b8912b7e92341fdb115ba0e2e5142a28684ff git | Not specified |
| CNA | Linux | Linux | affected cd39d9e6b7e4c58fa77783e7aedf7ada51d02ea3 96f44d493c280ea161569c43d7ed0f3b0815803a git | Not specified |
| CNA | Linux | Linux | affected cd39d9e6b7e4c58fa77783e7aedf7ada51d02ea3 37d545d12f21c4d50612ecaebd7ae1e5bf91b2d8 git | Not specified |
| CNA | Linux | Linux | affected 1a782fa32e644aa9fbae6c8488f3e61221ac96e1 git | Not specified |
| CNA | Linux | Linux | affected 17c010fe45def335fe03a0718935416b04c7f349 git | Not specified |
| CNA | Linux | Linux | affected f83d469e16bb1f75991ca67c56786fb2aaa42bea git | Not specified |
| CNA | Linux | Linux | affected f2b5e50cc04d7a049b385bc1c93b9cbf5f10c94f git | Not specified |
| CNA | Linux | Linux | affected 9262e3e04621558e875eb5afb5e726b648cd5949 git | Not specified |
| CNA | Linux | Linux | affected 6.1.149 6.2 semver | Not specified |
| CNA | Linux | Linux | affected 6.6.103 6.7 semver | Not specified |
| CNA | Linux | Linux | affected 6.12.43 6.13 semver | Not specified |
| CNA | Linux | Linux | affected 6.15.11 6.16 semver | Not specified |
| CNA | Linux | Linux | affected 6.16.2 6.17 semver | Not specified |
| CNA | Linux | Linux | affected 6.17 | Not specified |
| CNA | Linux | Linux | unaffected 6.17 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.51 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2.5 7.2.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.3-rc1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/37d545d12f21c4d50612ecaebd7ae1e5bf91b2d8 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/96f44d493c280ea161569c43d7ed0f3b0815803a | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/882b8912b7e92341fdb115ba0e2e5142a28684ff | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.