CVE-2026-97608

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

• https://git.kernel.org/stable/c/2c018cc4842c33f0c732962e2ab58635e8ae5823 416baaa9-dc9f-4396-8d5f-8c081fb06d67
• https://git.kernel.org/stable/c/64803ba0a05791cf9ca874466480e4c4cadaf7ab 416baaa9-dc9f-4396-8d5f-8c081fb06d67
• https://git.kernel.org/stable/c/dce24f3a146948595bb1b86347f31e20b4975daa 416baaa9-dc9f-4396-8d5f-8c081fb06d67
• https://git.kernel.org/stable/c/eaec35fae8f2052c1878a5c7cc7699d8357d79f2 416baaa9-dc9f-4396-8d5f-8c081fb06d67

The full cvelistV5 record. Download as CVE-2026-97608.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nf_log_syslog.c",
            "net/netfilter/nfnetlink_log.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "eaec35fae8f2052c1878a5c7cc7699d8357d79f2",
              "status": "affected",
              "version": "5b023fc8d8e0997e0b7ea6506d243afd5478c96e",
              "versionType": "git"
            },
            {
              "lessThan": "64803ba0a05791cf9ca874466480e4c4cadaf7ab",
              "status": "affected",
              "version": "5b023fc8d8e0997e0b7ea6506d243afd5478c96e",
              "versionType": "git"
            },
            {
              "lessThan": "dce24f3a146948595bb1b86347f31e20b4975daa",
              "status": "affected",
              "version": "5b023fc8d8e0997e0b7ea6506d243afd5478c96e",
              "versionType": "git"
            },
            {
              "lessThan": "2c018cc4842c33f0c732962e2ab58635e8ae5823",
              "status": "affected",
              "version": "5b023fc8d8e0997e0b7ea6506d243afd5478c96e",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nf_log_syslog.c",
            "net/netfilter/nfnetlink_log.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.10"
            },
            {
              "lessThan": "3.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.111",
                  "versionStartIncluding": "3.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.53",
                  "versionStartIncluding": "3.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.7",
                  "versionStartIncluding": "3.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc3",
                  "versionStartIncluding": "3.10",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_log: unregister loggers before per-net teardown\n\nnf_log_syslog and nfnetlink_log unregister their per-network namespace\noperations before unregistering their global logger backends. This\nleaves a window where a sysctl or netlink writer can rebind the still-\nregistered logger after the per-net pre-exit callback cleared the old\nselection.\n\nThe race looks like this:\n\n  CPU 0                                 CPU 1\n  ----                                  ----\n  unregister_pernet_subsys()\n    nf_log_unset(net, logger)\n      net->nf.nf_loggers[pf] = NULL\n\n                                        lock nf_log_mutex\n                                        find logger in loggers[][]\n                                        net->nf.nf_loggers[pf] = logger\n                                        unlock nf_log_mutex\n\n  nf_log_unregister(logger)\n    lock nf_log_mutex\n    loggers[pf][type] = NULL\n    unlock nf_log_mutex\n    synchronize_rcu()\n  module exit returns\n  module core frees backend memory\n\nLater, a sysctl read or packet logging operation can dereference the\nstale per-net logger pointer.\n\nFix this by unregistering the global logger backends before tearing down\nper-net state. Once the global registrations are gone, later writers can\nno longer rebind the logger. unregister_pernet_subsys() already waits\nfor an RCU grace period after the pre-exit callback clears the per-net\nselection, while nf_log_unregister() continues to cover readers of the\nglobal logger table.\n\nApply this ordering fix to both nf_log backends that combine per-net\nteardown with global logger registration."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - Both sides of the race are local. One is module exit (nf_log_syslog_exit or nfnetlink_log_fini through delete_module). The other is a write to the net.netfilter.nf_log.<pf> sysctl, handled by nf_log_proc_dostring(), or an NFULNL_CFG_CMD_PF_BIND message over nfnetlink. No remote peer supplies anything that causes the stale nf_loggers[] pointer.\nAC:H - The attacker controls the rebind side, but the other side is a module unload that needs init-namespace CAP_SYS_MODULE. The attacker cannot make it happen. They must win the short window between nf_log_unset() in the per-net pre-exit and nf_log_unregister() while an admin unloads the module.\nPR:L - nf_log_proc_dostring() rebinds net->nf.nf_loggers[pf] from the per-netns sysctl, which is writable in a non-init netns. The nfnetlink PF_BIND path only checks netlink_net_capable(CAP_NET_ADMIN). So user namespaces (unshare -Urn) are enough for the attacker's side.\nUI:N - No victim action on attacker-supplied content is needed. The module unload is an admin action outside the attacker's control and is already counted under AC:H.\nS:U - The stale logger pointer is used inside the same kernel. Nothing crosses a VM, IOMMU or other security boundary.\nC:H - After the module is freed, a sysctl read dereferences logger->name, and nf_log_packet() calls logger->logfn through the dangling nf_loggers[pf] pointer. This is a use-after-free of freed module memory that can be leveraged to disclose kernel memory.\nI:H - nf_log_packet() makes an indirect call through logger->logfn in the freed module's memory. If that memory is reused, this gives control-flow hijacking and memory corruption.\nA:H - Logging a packet, or reading the sysctl, after the logger module is gone faults on the unmapped or reused module memory and oopses the kernel."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-25T14:41:31.026Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/eaec35fae8f2052c1878a5c7cc7699d8357d79f2"
        },
        {
          "url": "https://git.kernel.org/stable/c/64803ba0a05791cf9ca874466480e4c4cadaf7ab"
        },
        {
          "url": "https://git.kernel.org/stable/c/dce24f3a146948595bb1b86347f31e20b4975daa"
        },
        {
          "url": "https://git.kernel.org/stable/c/2c018cc4842c33f0c732962e2ab58635e8ae5823"
        }
      ],
      "title": "netfilter: nf_log: unregister loggers before per-net teardown",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-97608",
    "datePublished": "2026-09-25T10:22:19.030Z",
    "dateReserved": "2026-09-24T16:01:01.158Z",
    "dateUpdated": "2026-09-25T14:41:31.026Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}