CVE-2026-89906
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | cd39d9e6b7e4c58fa77783e7aedf7ada51d02ea3 < 882b8912b7e92341fdb115ba0e2e5142a28684ff | affected |
| Linux | Linux | cd39d9e6b7e4c58fa77783e7aedf7ada51d02ea3 < 96f44d493c280ea161569c43d7ed0f3b0815803a | affected |
| Linux | Linux | cd39d9e6b7e4c58fa77783e7aedf7ada51d02ea3 < 37d545d12f21c4d50612ecaebd7ae1e5bf91b2d8 | affected |
| Linux | Linux | 1a782fa32e644aa9fbae6c8488f3e61221ac96e1 | affected |
| Linux | Linux | 17c010fe45def335fe03a0718935416b04c7f349 | affected |
| Linux | Linux | f83d469e16bb1f75991ca67c56786fb2aaa42bea | affected |
| Linux | Linux | f2b5e50cc04d7a049b385bc1c93b9cbf5f10c94f | affected |
| Linux | Linux | 9262e3e04621558e875eb5afb5e726b648cd5949 | affected |
| Linux | Linux | 6.1.149 < 6.2 | affected |
| Linux | Linux | 6.6.103 < 6.7 | affected |
| Linux | Linux | 6.12.43 < 6.13 | affected |
| Linux | Linux | 6.15.11 < 6.16 | affected |
| Linux | Linux | 6.16.2 < 6.17 | affected |
| Linux | Linux | 6.17 | affected |
| Linux | Linux | 0 < 6.17 | unaffected |
| Linux | Linux | 6.18.51 <= 6.18.* | unaffected |
| Linux | Linux | 7.2.5 <= 7.2.* | unaffected |
| Linux | Linux | 7.3-rc1 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/882b8912b7e92341fdb115ba0e2e5142a28684ff
- https://git.kernel.org/stable/c/96f44d493c280ea161569c43d7ed0f3b0815803a
- https://git.kernel.org/stable/c/37d545d12f21c4d50612ecaebd7ae1e5bf91b2d8
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