CVE-2026-89906LoongArch: BPF: Refactor jump offset calculation in tail call
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 21, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 17c010fe45def335fe03a0718935416b04c7f349 before 50fbc294e4e96246d60cd66f98acf043a362e3a0; from f83d469e16bb1f75991ca67c56786fb2aaa42bea before 89819868cde78cb2f748533785a46a3430873f20; from cd39d9e6b7e4c58fa77783e7aedf7ada51d02ea3 before 882b8912b7e92341fdb115ba0e2e5142a28684ff; from cd39d9e6b7e4c58fa77783e7aedf7ada51d02ea3 before 96f44d493c280ea161569c43d7ed0f3b0815803a; from cd39d9e6b7e4c58fa77783e7aedf7ada51d02ea3 before 37d545d12f21c4d50612ecaebd7ae1e5bf91b2d8; 1a782fa32e644aa9fbae6c8488f3e61221ac96e1; f2b5e50cc04d7a049b385bc1c93b9cbf5f10c94f; 9262e3e04621558e875eb5afb5e726b648cd5949; and 5 more ranges | CNA record |
References
- https://git.kernel.org/stable/c/50fbc294e4e96246d60cd66f98acf043a362e3a0
- https://git.kernel.org/stable/c/89819868cde78cb2f748533785a46a3430873f20
- https://git.kernel.org/stable/c/882b8912b7e92341fdb115ba0e2e5142a28684ff
- https://git.kernel.org/stable/c/96f44d493c280ea161569c43d7ed0f3b0815803a
- https://git.kernel.org/stable/c/37d545d12f21c4d50612ecaebd7ae1e5bf91b2d8
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.