CVE-2026-98381 (GCVE-0-2026-98381)

Vulnerability from cvelistv5 – Published: 2026-10-09 07:34 – Updated: 2026-10-24 14:08
VLAI
Title
veth: manage XDP program pointers during channel resize
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
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7018 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 4752eeb3d891c27905a8fdf4d80e899c0efd4ec7 , < 7a8e143109ff2736dc79e41dcd55af7ceab7520a (git)
Affected: 4752eeb3d891c27905a8fdf4d80e899c0efd4ec7 , < 1a5c5b9c64ba5f39dba55da6e12561ca56eeb758 (git)
Affected: 4752eeb3d891c27905a8fdf4d80e899c0efd4ec7 , < f0e8dba8c224981e53c792c6b3dbb7604fb2c2c6 (git)
Affected: 4752eeb3d891c27905a8fdf4d80e899c0efd4ec7 , < 3c10a5dd0d38f506f671dbb59e9d0ee4c72076f9 (git)
Affected: 4752eeb3d891c27905a8fdf4d80e899c0efd4ec7 , < 25bb7c36225220d30f404d7e29d2e052bc5f4b99 (git)
Affected: 4752eeb3d891c27905a8fdf4d80e899c0efd4ec7 , < 43f6b647f209591b1e3f726bb16b8dcba6b95908 (git)
Affected: 4752eeb3d891c27905a8fdf4d80e899c0efd4ec7 , < 7104a370714346b667712913dc16abf14bbc97ed (git)
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Linux Linux Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 5.15.222 , ≤ 5.15.* (semver)
Unaffected: 6.1.189 , ≤ 6.1.* (semver)
Unaffected: 6.6.158 , ≤ 6.6.* (semver)
Unaffected: 6.12.112 , ≤ 6.12.* (semver)
Unaffected: 6.18.55 , ≤ 6.18.* (semver)
Unaffected: 7.2.9 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
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          "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"
        }
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            "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"
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          "url": "https://git.kernel.org/stable/c/7a8e143109ff2736dc79e41dcd55af7ceab7520a"
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        {
          "url": "https://git.kernel.org/stable/c/7104a370714346b667712913dc16abf14bbc97ed"
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      "title": "veth: manage XDP program pointers during channel resize",
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    "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"
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      "date": "2026-11-01",
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      "percentile": "0.02172"
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      "product_status:fixed": "1",
      "product_status:known_affected": "1",
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      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "veth: manage XDP program pointers during channel resize",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-98381.json",
      "version": "4"
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            "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"
          }
        ],
        "id": "CVE-2026-98381",
        "lastModified": "2026-10-24T14:16:40.037",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.9,
              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
            }
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        "published": "2026-10-09T08:16:56.547",
        "references": [
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            "url": "https://git.kernel.org/stable/c/3c10a5dd0d38f506f671dbb59e9d0ee4c72076f9"
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            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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            "url": "https://git.kernel.org/stable/c/f0e8dba8c224981e53c792c6b3dbb7604fb2c2c6"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-10-24T14:27:31+00:00",
      "cve": "CVE-2026-98381",
      "id": "CVE-2026-98381",
      "initial_release_date": "2026-10-09T00:00:00+00:00",
      "product_status:known_affected": "250",
      "product_status:known_not_affected": "28",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: veth: manage XDP program pointers during channel resize",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98381.json",
      "version": "3"
    }
  }
}



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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.