net/sched: taprio: proper TCA_TAPRIO_TC_ENTRY_INDEX check

{
  "id": "bf4dcb98dcbbfab1a4c8170e11d59258c652a84321fe2b2b4846fb6e3a8e4a4e",
  "url": "https://osv.dev/vulnerability/CVE-2024-26815",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "net/sched: taprio: proper TCA_TAPRIO_TC_ENTRY_INDEX check",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: net/sched: taprio: proper TCA_TAPRIO_TC_ENTRY_INDEX check taprio_parse_tc_entry() is not correctly checking TCA_TAPRIO_TC_ENTRY_INDEX attribute: int tc; // Signed value tc = nla_get_u32(tb[TCA_TAPRIO_TC_ENTRY_INDEX]); if (tc >= TC_QOPT_MAX_QUEUE) { NL_SET_ERR_MSG_MOD(extack, \"TC entry index out of range\"); return -ERANGE; } syzbot reported that it could fed arbitary negative values: UBSAN: shift-out-of-bounds in net/sched/sch_taprio.c:1722:18 shift exponent -2147418108 is negative CPU: 0 PID: 5066 Comm: syz-executor367 Not tainted 6.8.0-rc7-syzkaller-00136-gc8a5c731fd12 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106 ubsan_epilogue lib/ubsan.c:217 [inline] __ubsan_handle_shift_out_of_bounds+0x3c7/0x420 lib/ubsan.c:386 taprio_parse_tc_entry net/sched/sch_taprio.c:1722 [inline] taprio_parse_tc_entries net/sched/sch_taprio.c:1768 [inline] taprio_change+0xb87/0x57d0 net/sched/sch_taprio.c:1877 taprio_init+0x9da/0xc80 net/sched/sch_taprio.c:2134 qdisc_create+0x9d4/0x1190 net/sched/sch_api.c:1355 tc_modify_qdisc+0xa26/0x1e40 net/sched/sch_api.c:1776 rtnetlink_rcv_msg+0x885/0x1040 net/core/rtnetlink.c:6617 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2543 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x7ea/0x980 net/netlink/af_netli",
    "evidence": "osv:CVE-2024-26815",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.83",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.23",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.7.11",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.8.2",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2024-26815",
      "aliases": [
        "CVE-2024-26815"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                  "introduced": "a54fc09e4cba3004443aa05979f8c678196c8226"
                },
                {
                  "fixed": "bd2474a45df7c11412c2587de3d4e43760531418"
                },
                {
                  "fixed": "6915b1b28fe57e92c78e664366dc61c4f15ff03b"
                },
                {
                  "fixed": "860e838fb089d652a446ced52cbdf051285b68e7"
                },
                {
                  "fixed": "9b720bb1a69a9f12a4a5c86b6f89386fe05ed0f2"
                },
                {
                  "fixed": "343041b59b7810f9cdca371f445dd43b35c740b1"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26815.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.1.0"
                },
                {
                  "fixed": "6.1.83"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.23"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.7.11"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.8.0"
                },
                {
                  "fixed": "6.8.2"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26815.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:51.124706330Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/343041b59b7810f9cdca371f445dd43b35c740b1",
        "https://git.kernel.org/stable/c/6915b1b28fe57e92c78e664366dc61c4f15ff03b",
        "https://git.kernel.org/stable/c/860e838fb089d652a446ced52cbdf051285b68e7",
        "https://git.kernel.org/stable/c/9b720bb1a69a9f12a4a5c86b6f89386fe05ed0f2",
        "https://git.kernel.org/stable/c/bd2474a45df7c11412c2587de3d4e43760531418",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26815.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-26815",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26815.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-26815",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 519637,
  "published_at": "2024-04-10T11:07:03.182+00:00"
}