{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd"
            },
            {
              "fixed": "9738be665544281aa624842812c2fbfed6f88226"
            },
            {
              "fixed": "240c5302eed83e34e98db18f6795ee5f40814024"
            },
            {
              "fixed": "9596759a84e1dbf2670518d85e969208960041f9"
            },
            {
              "fixed": "95246341945163ad9a250a87ca5bd1c1252777ae"
            },
            {
              "fixed": "9d74d10e4e26672e139a8bcf8bf95957bf2d160f"
            },
            {
              "fixed": "7ff87da099210856cbfe2f2f7f52ddfa57af4f0c"
            },
            {
              "fixed": "e182fe273cdf5a8931592228196ef514ffac392b"
            },
            {
              "fixed": "72d96e4e24bbefdcfbc68bdb9341a05d8f5cb6e5"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.16.0"
            },
            {
              "fixed": "5.10.253"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.203"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.168"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.131"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.80"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.21"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31494.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: macb: use the current queue number for stats\n\nThere's a potential mismatch between the memory reserved for statistics\nand the amount of memory written.\n\ngem_get_sset_count() correctly computes the number of stats based on the\nactive queues, whereas gem_get_ethtool_stats() indiscriminately copies\ndata using the maximum number of queues, and in the case the number of\nactive queues is less than MACB_MAX_QUEUES, this results in a OOB write\nas observed in the KASAN splat.\n\n==================================================================\nBUG: KASAN: vmalloc-out-of-bounds in gem_get_ethtool_stats+0x54/0x78\n  [macb]\nWrite of size 760 at addr ffff80008080b000 by task ethtool/1027\n\nCPU: [...]\nTainted: [E]=UNSIGNED_MODULE\nHardware name: raspberrypi rpi/rpi, BIOS 2025.10 10/01/2025\nCall trace:\n show_stack+0x20/0x38 (C)\n dump_stack_lvl+0x80/0xf8\n print_report+0x384/0x5e0\n kasan_report+0xa0/0xf0\n kasan_check_range+0xe8/0x190\n __asan_memcpy+0x54/0x98\n gem_get_ethtool_stats+0x54/0x78 [macb\n   926c13f3af83b0c6fe64badb21ec87d5e93fcf65]\n dev_ethtool+0x1220/0x38c0\n dev_ioctl+0x4ac/0xca8\n sock_do_ioctl+0x170/0x1d8\n sock_ioctl+0x484/0x5d8\n __arm64_sys_ioctl+0x12c/0x1b8\n invoke_syscall+0xd4/0x258\n el0_svc_common.constprop.0+0xb4/0x240\n do_el0_svc+0x48/0x68\n el0_svc+0x40/0xf8\n el0t_64_sync_handler+0xa0/0xe8\n el0t_64_sync+0x1b0/0x1b8\n\nThe buggy address belongs to a 1-page vmalloc region starting at\n  0xffff80008080b000 allocated at dev_ethtool+0x11f0/0x38c0\nThe buggy address belongs to the physical page:\npage: refcount:1 mapcount:0 mapping:0000000000000000\n  index:0xffff00000a333000 pfn:0xa333\nflags: 0x7fffc000000000(node=0|zone=0|lastcpupid=0x1ffff)\nraw: 007fffc000000000 0000000000000000 dead000000000122 0000000000000000\nraw: ffff00000a333000 0000000000000000 00000001ffffffff 0000000000000000\npage dumped because: kasan: bad access detected\n\nMemory state around the buggy address:\n ffff80008080b080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n ffff80008080b100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n\u003effff80008080b180: 00 00 00 00 00 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8\n                                  ^\n ffff80008080b200: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8\n ffff80008080b280: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8\n==================================================================\n\nFix it by making sure the copied size only considers the active number of\nqueues.",
  "id": "CVE-2026-31494",
  "modified": "2026-07-08T05:36:34.803815963Z",
  "published": "2026-04-22T13:54:16.922Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/240c5302eed83e34e98db18f6795ee5f40814024"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/72d96e4e24bbefdcfbc68bdb9341a05d8f5cb6e5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7ff87da099210856cbfe2f2f7f52ddfa57af4f0c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/95246341945163ad9a250a87ca5bd1c1252777ae"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9596759a84e1dbf2670518d85e969208960041f9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9738be665544281aa624842812c2fbfed6f88226"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9d74d10e4e26672e139a8bcf8bf95957bf2d160f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e182fe273cdf5a8931592228196ef514ffac392b"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31494.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31494"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "net: macb: use the current queue number for stats"
}