{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "ceed73a2cf4aff2921802aa3d21d45280677547d"
            },
            {
              "fixed": "ed25befc8c36f896b5878f9078faddb67fd7e2d0"
            },
            {
              "fixed": "a54d76d176e50d2fdbd39b7231efe256170339e4"
            },
            {
              "fixed": "00f4c366dbca16a40772c3b7ec2d8cba839e9724"
            },
            {
              "fixed": "3868c3244369ab709a90c9aad7534d406009b824"
            },
            {
              "fixed": "14eb0c9491385d5361a292ea4974aec0e6887299"
            },
            {
              "fixed": "1b12612c367e4be9b0814c0468e7e687835315b4"
            },
            {
              "fixed": "231a8a4b76cb1b1827b3b19d7b3603642f5aaaef"
            },
            {
              "fixed": "f0f1887a9e30712a1df03e152dce6fb91344b1f3"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.14.0"
            },
            {
              "fixed": "5.10.261"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.212"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.178"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.145"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.97"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.40"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64550.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: qualcomm: rmnet: validate MAP frame length before ingress parsing\n\nWhen ingress deaggregation is disabled, rmnet_map_ingress_handler() passes\nthe skb straight to __rmnet_map_ingress_handler(), skipping the length\nvalidation that rmnet_map_deaggregate() performs on the aggregated path.\nThe parser then dereferences the MAP header and csum header/trailer based on\nthe on-wire pkt_len without checking skb-\u003elen, so a short frame is read out\nof bounds:\n\n  BUG: KASAN: slab-out-of-bounds in rmnet_map_checksum_downlink_packet\n  Read of size 1 at addr ffff88801118ed00 by task exploit/147\n  Call Trace:\n   ...\n   rmnet_map_checksum_downlink_packet (drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c:413)\n   __rmnet_map_ingress_handler (drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c:96)\n   rmnet_rx_handler (drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c:129)\n   __netif_receive_skb_core.constprop.0 (net/core/dev.c:6089)\n   netif_receive_skb (net/core/dev.c:6460)\n   tun_get_user (drivers/net/tun.c:1955)\n   tun_chr_write_iter (drivers/net/tun.c:2001)\n   vfs_write (fs/read_write.c:688)\n   ksys_write (fs/read_write.c:740)\n   do_syscall_64 (arch/x86/entry/syscall_64.c:94)\n   ...\n\nFactor that validation out of rmnet_map_deaggregate() into\nrmnet_map_validate_packet_len() and run it on the no-aggregation path too.\nThe MAP header is bounds-checked first, since this path can receive a frame\nshorter than the header.",
  "id": "CVE-2026-64550",
  "modified": "2026-07-29T03:30:17.523286171Z",
  "published": "2026-07-27T20:10:39.459Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/00f4c366dbca16a40772c3b7ec2d8cba839e9724"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/14eb0c9491385d5361a292ea4974aec0e6887299"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1b12612c367e4be9b0814c0468e7e687835315b4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/231a8a4b76cb1b1827b3b19d7b3603642f5aaaef"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3868c3244369ab709a90c9aad7534d406009b824"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a54d76d176e50d2fdbd39b7231efe256170339e4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ed25befc8c36f896b5878f9078faddb67fd7e2d0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f0f1887a9e30712a1df03e152dce6fb91344b1f3"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64550.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64550"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "net: qualcomm: rmnet: validate MAP frame length before ingress parsing"
}