CVE-2026-98381 (GCVE-0-2026-98381)
Vulnerability from cvelistv5
Published
2026-10-09 07:34
Modified
2026-10-24 14:08
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: veth: manage XDP program pointers during channel resize veth_set_channels() tears down XDP resources for removed RX queues without clearing rq->xdp_prog. If the program is then detached or replaced, those queues keep the old pointer after bpf_prog_put(). A later channel increase can re-enable NAPI and run the freed program. BUG: unable to handle page fault for address: ffffc90000256048 Oops: Oops: 0000 [#1] SMP KASAN NOPTI RIP: veth_xdp_rcv_skb (include/linux/filter.h:779 include/net/xdp.h:696 drivers/net/veth.c:820) Call Trace: veth_xdp_rcv (drivers/net/veth.c:941) veth_poll (drivers/net/veth.c:986) __napi_poll (net/core/dev.c:7787) net_rx_action (net/core/dev.c:7850 net/core/dev.c:8007) handle_softirqs (kernel/softirq.c:645) Kernel panic - not syncing: Fatal exception in interrupt
References
Impacted products
Vendor Product Version
Linux Linux Version: 4752eeb3d891c27905a8fdf4d80e899c0efd4ec7
Version: 4752eeb3d891c27905a8fdf4d80e899c0efd4ec7
Version: 4752eeb3d891c27905a8fdf4d80e899c0efd4ec7
Version: 4752eeb3d891c27905a8fdf4d80e899c0efd4ec7
Version: 4752eeb3d891c27905a8fdf4d80e899c0efd4ec7
Version: 4752eeb3d891c27905a8fdf4d80e899c0efd4ec7
Version: 4752eeb3d891c27905a8fdf4d80e899c0efd4ec7
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/veth.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "7a8e143109ff2736dc79e41dcd55af7ceab7520a",
              "status": "affected",
              "version": "4752eeb3d891c27905a8fdf4d80e899c0efd4ec7",
              "versionType": "git"
            },
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              "status": "affected",
              "version": "4752eeb3d891c27905a8fdf4d80e899c0efd4ec7",
              "versionType": "git"
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              "status": "affected",
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              "versionType": "git"
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              "version": "4752eeb3d891c27905a8fdf4d80e899c0efd4ec7",
              "versionType": "git"
            },
            {
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              "status": "affected",
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/veth.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.15"
            },
            {
              "lessThan": "5.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.55",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.222",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.189",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.158",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.112",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.55",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.9",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nveth: manage XDP program pointers during channel resize\n\nveth_set_channels() tears down XDP resources for removed RX queues\nwithout clearing rq-\u003exdp_prog.  If the program is then detached or\nreplaced, those queues keep the old pointer after bpf_prog_put().\nA later channel increase can re-enable NAPI and run the freed program.\n\n  BUG: unable to handle page fault for address: ffffc90000256048\n  Oops: Oops: 0000 [#1] SMP KASAN NOPTI\n  RIP: veth_xdp_rcv_skb (include/linux/filter.h:779\n                         include/net/xdp.h:696 drivers/net/veth.c:820)\n  Call Trace:\n   veth_xdp_rcv (drivers/net/veth.c:941)\n   veth_poll (drivers/net/veth.c:986)\n   __napi_poll (net/core/dev.c:7787)\n   net_rx_action (net/core/dev.c:7850 net/core/dev.c:8007)\n   handle_softirqs (kernel/softirq.c:645)\n  Kernel panic - not syncing: Fatal exception in interrupt"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - ETHTOOL_MSG_CHANNELS_SET enters ethnl_set_channels() -\u003e veth_set_channels() -\u003e veth_disable_range_safe()/veth_enable_range_safe() -\u003e the patched veth_napi_del_range()/__veth_napi_enable_range(); this is local netlink configuration, and final traffic comes from the veth peer, not a remote protocol message.\nAC:L - The same attacker can resize down, replace XDP so veth_xdp_set() calls bpf_prog_put(), resize up, and transmit on the restored queue. RTNL serialization makes this a deterministic sequence rather than a race or victim-dependent condition.\nPR:L - ETHTOOL_MSG_CHANNELS_SET is GENL_UNS_ADMIN_PERM and RTM_SETLINK checks CAP_NET_ADMIN in the target network namespace; BPF_PROG_LOAD uses bpf_token_capable() to accept CAP_BPF/CAP_NET_ADMIN in a delegated token\u0027s user namespace, so init-namespace root is not required.\nUI:N - The attacker performs the XDP replacement, both channel resizes, and the peer transmission; no victim must mount, open, or otherwise act on attacker-supplied data.\nS:U - The stale rq-\u003exdp_prog is consumed by veth_xdp_rcv_skb() inside the same host kernel that owns the veth device; it does not cross a VM, IOMMU, or separate security authority.\nC:H - The removed rq retains a freed vmalloc-backed struct bpf_prog; reclaiming it controls fields read by __bpf_prog_run(), including insnsi and bpf_func, enabling kernel code execution and arbitrary kernel reads.\nI:H - veth_xdp_rcv_skb() passes the stale program to bpf_prog_run_xdp(), and __bpf_prog_run() performs an indirect call through freed prog-\u003ebpf_func; controlled reuse can redirect kernel control flow.\nA:H - The reported restored-queue packet reaches veth_xdp_rcv_skb() through veth_poll() and faults on the freed program, producing an oops and fatal kernel panic."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-24T14:08:38.193Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/7a8e143109ff2736dc79e41dcd55af7ceab7520a"
        },
        {
          "url": "https://git.kernel.org/stable/c/1a5c5b9c64ba5f39dba55da6e12561ca56eeb758"
        },
        {
          "url": "https://git.kernel.org/stable/c/f0e8dba8c224981e53c792c6b3dbb7604fb2c2c6"
        },
        {
          "url": "https://git.kernel.org/stable/c/3c10a5dd0d38f506f671dbb59e9d0ee4c72076f9"
        },
        {
          "url": "https://git.kernel.org/stable/c/25bb7c36225220d30f404d7e29d2e052bc5f4b99"
        },
        {
          "url": "https://git.kernel.org/stable/c/43f6b647f209591b1e3f726bb16b8dcba6b95908"
        },
        {
          "url": "https://git.kernel.org/stable/c/7104a370714346b667712913dc16abf14bbc97ed"
        }
      ],
      "title": "veth: manage XDP program pointers during channel resize",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98381",
    "datePublished": "2026-10-09T07:34:21.029Z",
    "dateReserved": "2026-09-25T10:25:14.345Z",
    "dateUpdated": "2026-10-24T14:08:38.193Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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