{
  "cveId": "CVE-2026-98228",
  "url": "https://patchblox.com/security/cve/CVE-2026-98228",
  "summary": "CVE-2026-98228 is fixed in linux on 1 platform by DEBIAN-CVE-2026-98228 (version 7.2.8-1), released October 6, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "mips: select CONFIG_WEAK_REORDERING_BEYOND_LLSC from CONFIG_EYEQ",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  mips: select CONFIG_WEAK_REORDERING_BEYOND_LLSC from CONFIG_EYEQ  On I6500 CPU cores, lld and scd give no ordering guarantees (same as all other instructions). To respect the assumption that arch_cmpxchg() is fully ordered, we must inject sync instructions above and below our lld/scd loops using the already in place WEAK_REORDERING_BEYOND_LLSC infrastructure.  Otherwise, bad things can happen:  [   34.054496] CPU 3 Unable to handle kernel paging request at virtual address 0000000000000000, epc == a80000080838e01c, ra == a80000080838dfc4 [   34.054559] Oops[#1]: [   34.069561] CPU: 3 UID: 0 PID: 170 Comm: pipe_race Not tainted 7.2.0-rc6-01553-gb73c35220968-dirty #103 VOLUNTARY [   34.079932] Hardware name: Mobile EyeQ5 MP5 Evaluation board [   34.085592] $ 0   : 0000000000000000 0000000000000001 0000000000000000 0000000000000000 [   34.093616] $ 4   : a800000808ee2618 000000000b7a879d 0000000000001000 0000000000000000 [   34.101638] $ 8   : 0000000000e3f2c9 0000000000000000 a800000808a2a9f8 0000000000000000 [   34.109660] $12   : a8000008139ffcd8 ffffffff84080018 a80000080837fae0 7878787878787878 [   34.117682] $16   : a800000807e82940 0000000000001000 0000000000000000 0000000000000000 [   34.125704] $20   : a800000802920e00 a8000008139ffdf8 a800000802649400 0000000000e3f2c9 [   34.133726] $24   : 0000000000000006 00000001200406e0 [   34.141783] $28   : a8000008139fc000 a8000008139ffd10 0000000000e3f2c8 a80000080838dfc4 [   34.149837] epc   : a80000080838e01c anon_pipe_read\u002B0xd4/0x428 [   34.155697] ra    : a80000080838dfc4 anon_pipe_read\u002B0x7c/0x428 [   34.161549] Status: 140000e3  KX SX UX KERNEL EXL IE [   34.166551] Cause : 40800408 (ExcCode 02) [   34.170574] BadVA : 0000000000000000 [   34.174161] PrId  : 0001b028 (MIPS I6500) [   34.178183] Process pipe_race (pid: 170, threadinfo=000000005ca35720, task=00000000e1013890, tls=000000014ebbb780) [   34.188568] Stack : a800000802649400 0000000000000000 0000000000000000 a8000008139ffdd0 [   34.196623]\t 0000000000000fba a800000808ee0000 0000000000000001 a8000008130c3e80 [   34.204676]\t a8000008080d1280 a8000008139ffd58 a8000008139ffd58 1dbd2b22ea1dd500 [   34.212729]\t a800000802649400 a800000808ee0000 ffffffffffffffea 0000000000000001 [   34.220783]\t 0000000000001000 0000000000000000 00000001200ae518 ffffffffffffffff [   34.228836]\t 000000fffbe0e530 a80000080837edf4 000000fffbe0e530 0000000000000000 [   34.236890]\t 0000000000000000 0000000000000000 000000014ebb55a0 0000000000001000 [   34.244943]\t 0000000000000001 a800000802649400 0000000000000000 0000000000000000 [   34.252996]\t 0000000000000000 0000400400000000 0000000000000000 1dbd2b22ea1dd500 [   34.261049]\t 00000000140000e3 a800000802649400 a800000802649400 a800000808ee0000 [   34.269103]\t ... [   34.271568] Call Trace: [   34.274026] [\u003Ca80000080838e01c\u003E] anon_pipe_read\u002B0xd4/0x428 [   34.279533] [\u003Ca80000080837edf4\u003E] vfs_read\u002B0x25c/0x318 [   34.284607] [\u003Ca80000080837faac\u003E] ksys_read\u002B0x104/0x138 [   34.289763] [\u003Ca80000080802b9cc\u003E] syscall_common\u002B0x44/0x68 [   34.295187] [   34.296689] Code: f84000cf  02209825  de020010 \u003Cdc420000\u003E d8400004  02002825  0040f809  02802025  f84000c3 [   34.306504] [   34.308099] ---[ end trace 0000000000000000 ]---  My initial reproducer was the xdp-tools test suite. A standalone reproducer would be an lld/scd loop that, when the read is reordered by the CPU, triggers a fault. We can achieve this from userspace by stressing an anonymous pipe, which uses a mutex. Program used:  \t// SPDX-License-Identifier: GPL-2.0 \t// pipe_race.c - reproducer for MIPS LL/SC reordering vs fs/pipe.c \t// \t// Two userspace processes on an anonymous pipe: \t//   parent  = writer: tight write() loop \t//   child   = reader: tight read() loop  \t#define _GNU_SOURCE \t#include \u003Cassert.h\u003E \t#include \u003Cerrno.h\u003E \t#include \u003Csched.h\u003E \t#include \u003Csignal.h\u003E \t#include \u003Cstdio.h\u003E \t#include \u003Cstdlib.h\u003E \t#include \u003Cstring.h\u003E \t#include \u003Csys/types.h\u003E \t#include ---truncated---",
  "published": "2026-10-06T09:18:10Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00127,
  "epssPercentile": 0.02401,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-98228",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.8-1",
      "fix": "DEBIAN-CVE-2026-98228",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98228",
      "released": "2026-10-06T21:56:27Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}