CVE-2026-74609 (GCVE-0-2026-74609)

Vulnerability from cvelistv5 – Published: 2026-08-22 15:31 – Updated: 2026-08-25 05:40
VLAI
Title
tipc: read le->link under the node lock in tipc_node_link_down()
Summary
In the Linux kernel, the following vulnerability has been resolved: tipc: read le->link under the node lock in tipc_node_link_down() tipc_node_link_down() caches the link pointer before taking n->lock: struct tipc_link *l = le->link; /* unlocked */ if (!l) return; tipc_node_write_lock(n); if (!tipc_link_is_establishing(l)) { /* deref l */ ... tipc_link_reset(l); /* write into l */ if (delete) { kfree(l); le->link = NULL; The delete=true caller frees that very object under n->lock, so the lock does not protect the cached pointer against it: - CPU A, delete=false: tipc_rcv() on TIPC_LINK_DOWN_EVT, or the link supervision timer via tipc_node_timeout(), reads l unlocked and then dereferences it under n->lock; - CPU B, delete=true: netlink TIPC_NL_BEARER_DISABLE -> bearer_disable() -> tipc_node_delete_links() -> tipc_node_link_down(n, bearer_id, true) -> kfree(l). The link is freed with plain kfree(), not kfree_rcu(), and for UDP bearers disable_media() only schedules the asynchronous cleanup_bearer() work, so its synchronize_net() runs after the links are already gone. An in-flight CPU A that has read l therefore dereferences freed memory once B frees it: a use-after-free read in tipc_link_is_establishing(), and a use-after-free write via tipc_link_reset() on the establishing branch. The following trace was captured on 7.2.0-rc5-00284-gaf39eb111ce6: BUG: KASAN: slab-use-after-free in tipc_link_is_establishing (net/tipc/link.c:285) Read of size 4 at addr ffff88802e2aa068 by task swapper/2/0 tipc_link_is_establishing (net/tipc/link.c:285) tipc_node_link_down (net/tipc/node.c:1076) tipc_node_timeout (net/tipc/node.c:843) Allocated by task 9549: tipc_link_create (net/tipc/link.c:490) tipc_node_check_dest (net/tipc/node.c:1279) tipc_disc_rcv (net/tipc/discover.c:252) tipc_udp_recv (net/tipc/udp_media.c:389) Freed by task 9549: tipc_node_link_down (net/tipc/node.c:1084) tipc_node_delete_links (net/tipc/node.c:1320) bearer_disable (net/tipc/bearer.c:414) __tipc_nl_bearer_disable (net/tipc/bearer.c:992) Move the le->link read inside tipc_node_write_lock(), so it is serialised against the kfree() in the delete path. A racing teardown now either has not run yet, and we see a valid link, or has already run, and we see NULL.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 73f646cec35477b5099d7e952297cb9e1855be45 , < 2be741ad565c610871a6a95062c12c39da7168fd (git)
Affected: 73f646cec35477b5099d7e952297cb9e1855be45 , < 69d209461c110388710e483a130caf051e4fd09a (git)
Affected: 73f646cec35477b5099d7e952297cb9e1855be45 , < de017c22135f545ca4e65d1eada22887b64958eb (git)
Affected: 73f646cec35477b5099d7e952297cb9e1855be45 , < 47ba70891b10b2feb52462086b7fcd2ad75d3ce3 (git)
Affected: 73f646cec35477b5099d7e952297cb9e1855be45 , < a714d62513befef37f71f4ae89bb1fe173b65f2e (git)
Affected: 73f646cec35477b5099d7e952297cb9e1855be45 , < c3f2347a47754eac690967cfd82cb6d559817b07 (git)
Affected: 73f646cec35477b5099d7e952297cb9e1855be45 , < 5558a8312452ddb21eff22b1cbd84302ad951944 (git)
Affected: 73f646cec35477b5099d7e952297cb9e1855be45 , < cba9ccb47e9fa4cc77692fb896cc5ab57a667882 (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.4
Unaffected: 0 , < 4.4 (semver)
Unaffected: 5.10.265 , ≤ 5.10.* (semver)
Unaffected: 5.15.216 , ≤ 5.15.* (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.152 , ≤ 6.6.* (semver)
Unaffected: 6.12.104 , ≤ 6.12.* (semver)
Unaffected: 6.18.45 , ≤ 6.18.* (semver)
Unaffected: 7.1.9 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/tipc/node.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2be741ad565c610871a6a95062c12c39da7168fd",
              "status": "affected",
              "version": "73f646cec35477b5099d7e952297cb9e1855be45",
              "versionType": "git"
            },
            {
              "lessThan": "69d209461c110388710e483a130caf051e4fd09a",
              "status": "affected",
              "version": "73f646cec35477b5099d7e952297cb9e1855be45",
              "versionType": "git"
            },
            {
              "lessThan": "de017c22135f545ca4e65d1eada22887b64958eb",
              "status": "affected",
              "version": "73f646cec35477b5099d7e952297cb9e1855be45",
              "versionType": "git"
            },
            {
              "lessThan": "47ba70891b10b2feb52462086b7fcd2ad75d3ce3",
              "status": "affected",
              "version": "73f646cec35477b5099d7e952297cb9e1855be45",
              "versionType": "git"
            },
            {
              "lessThan": "a714d62513befef37f71f4ae89bb1fe173b65f2e",
              "status": "affected",
              "version": "73f646cec35477b5099d7e952297cb9e1855be45",
              "versionType": "git"
            },
            {
              "lessThan": "c3f2347a47754eac690967cfd82cb6d559817b07",
              "status": "affected",
              "version": "73f646cec35477b5099d7e952297cb9e1855be45",
              "versionType": "git"
            },
            {
              "lessThan": "5558a8312452ddb21eff22b1cbd84302ad951944",
              "status": "affected",
              "version": "73f646cec35477b5099d7e952297cb9e1855be45",
              "versionType": "git"
            },
            {
              "lessThan": "cba9ccb47e9fa4cc77692fb896cc5ab57a667882",
              "status": "affected",
              "version": "73f646cec35477b5099d7e952297cb9e1855be45",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/tipc/node.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.4"
            },
            {
              "lessThan": "4.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.265",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.152",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.104",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.45",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.265",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.216",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.183",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.152",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.104",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.45",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.9",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: read le-\u003elink under the node lock in tipc_node_link_down()\n\ntipc_node_link_down() caches the link pointer before taking n-\u003elock:\n\n\tstruct tipc_link *l = le-\u003elink;\t\t/* unlocked */\n\n\tif (!l)\n\t\treturn;\n\ttipc_node_write_lock(n);\n\tif (!tipc_link_is_establishing(l)) {\t/* deref l */\n\t...\n\t\ttipc_link_reset(l);\t\t/* write into l */\n\tif (delete) {\n\t\tkfree(l);\n\t\tle-\u003elink = NULL;\n\nThe delete=true caller frees that very object under n-\u003elock, so the lock\ndoes not protect the cached pointer against it:\n\n - CPU A, delete=false: tipc_rcv() on TIPC_LINK_DOWN_EVT, or the link\n   supervision timer via tipc_node_timeout(), reads l unlocked and then\n   dereferences it under n-\u003elock;\n - CPU B, delete=true: netlink TIPC_NL_BEARER_DISABLE -\u003e bearer_disable()\n   -\u003e tipc_node_delete_links() -\u003e tipc_node_link_down(n, bearer_id, true)\n   -\u003e kfree(l).\n\nThe link is freed with plain kfree(), not kfree_rcu(), and for UDP bearers\ndisable_media() only schedules the asynchronous cleanup_bearer() work, so\nits synchronize_net() runs after the links are already gone.  An in-flight\nCPU A that has read l therefore dereferences freed memory once B frees it:\na use-after-free read in tipc_link_is_establishing(), and a use-after-free\nwrite via tipc_link_reset() on the establishing branch.\n\nThe following trace was captured on 7.2.0-rc5-00284-gaf39eb111ce6:\n\n  BUG: KASAN: slab-use-after-free in tipc_link_is_establishing (net/tipc/link.c:285)\n  Read of size 4 at addr ffff88802e2aa068 by task swapper/2/0\n   tipc_link_is_establishing (net/tipc/link.c:285)\n   tipc_node_link_down (net/tipc/node.c:1076)\n   tipc_node_timeout (net/tipc/node.c:843)\n  Allocated by task 9549:\n   tipc_link_create (net/tipc/link.c:490)\n   tipc_node_check_dest (net/tipc/node.c:1279)\n   tipc_disc_rcv (net/tipc/discover.c:252)\n   tipc_udp_recv (net/tipc/udp_media.c:389)\n  Freed by task 9549:\n   tipc_node_link_down (net/tipc/node.c:1084)\n   tipc_node_delete_links (net/tipc/node.c:1320)\n   bearer_disable (net/tipc/bearer.c:414)\n   __tipc_nl_bearer_disable (net/tipc/bearer.c:992)\n\nMove the le-\u003elink read inside tipc_node_write_lock(), so it is serialised\nagainst the kfree() in the delete path.  A racing teardown now either has\nnot run yet, and we see a valid link, or has already run, and we see NULL."
        }
      ],
      "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 - The UAF race requires the delete=true path (kfree) via TIPC_NL_BEARER_DISABLE/bearer_disable() or netns teardown, reachable only through local RTNL/genlink with CAP_NET_ADMIN; remote tipc_rcv() packets alone cannot free links and complete the race.\nAC:L - An attacker with CAP_NET_ADMIN controls both CPUs by scripting bearer disable/netns teardown while concurrently driving link-down events via TIPC traffic or link supervision timers; KASAN reproduced this reliably without uncontrollable victim timing.\nPR:L - Bearer disable and link deletion require CAP_NET_ADMIN (GENL_UNS_ADMIN_PERM on TIPC_NL_BEARER_DISABLE); tipc_genl_family is netns-aware, so unprivileged users obtain effective net-admin via user/network namespaces (unshare -Urn).\nUI:N - No victim interaction is required; the attacker scripts bearer teardown and concurrent TIPC link activity from their own processes without needing another user to mount, open files, or perform administrative actions.\nS:U - Slab UAF corrupts host kernel heap memory within the same kernel security authority; impact is kernel crash or local privilege escalation, not a VM, IOMMU, or cross-container sandbox boundary escape.\nC:H - Slab use-after-free read in tipc_link_is_establishing() dereferences freed tipc_link objects (KASAN-confirmed), enabling disclosure of freed kernel memory and supporting further heap exploitation primitives.\nI:H - On the establishing branch tipc_link_reset() performs multiple writes into the freed tipc_link structure, corrupting kernel heap metadata and adjacent objects in ways exploitable for arbitrary write and control-flow hijacking.\nA:H - KASAN-confirmed slab-use-after-free in tipc_node_link_down() causes kernel oops/panic (observed on swapper during tipc_node_timeout), and the race can be retriggered during bearer teardown loops for reliable denial of service."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-25T05:40:34.778Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2be741ad565c610871a6a95062c12c39da7168fd"
        },
        {
          "url": "https://git.kernel.org/stable/c/69d209461c110388710e483a130caf051e4fd09a"
        },
        {
          "url": "https://git.kernel.org/stable/c/de017c22135f545ca4e65d1eada22887b64958eb"
        },
        {
          "url": "https://git.kernel.org/stable/c/47ba70891b10b2feb52462086b7fcd2ad75d3ce3"
        },
        {
          "url": "https://git.kernel.org/stable/c/a714d62513befef37f71f4ae89bb1fe173b65f2e"
        },
        {
          "url": "https://git.kernel.org/stable/c/c3f2347a47754eac690967cfd82cb6d559817b07"
        },
        {
          "url": "https://git.kernel.org/stable/c/5558a8312452ddb21eff22b1cbd84302ad951944"
        },
        {
          "url": "https://git.kernel.org/stable/c/cba9ccb47e9fa4cc77692fb896cc5ab57a667882"
        }
      ],
      "title": "tipc: read le-\u003elink under the node lock in tipc_node_link_down()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74609",
    "datePublished": "2026-08-22T15:31:56.054Z",
    "dateReserved": "2026-08-15T05:44:03.920Z",
    "dateUpdated": "2026-08-25T05:40:34.778Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-74609",
      "date": "2026-08-29",
      "epss": "0.00126",
      "percentile": "0.02535"
    },
    "microsoft_vex": {
      "current_release_date": "2026-08-24T14:45:32.000Z",
      "cve": "CVE-2026-74609",
      "id": "msrc_CVE-2026-74609",
      "initial_release_date": "2026-08-24T01:02:04.000Z",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "tipc: read le-\u003elink under the node lock in tipc_node_link_down()",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-74609.json",
      "version": "2"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-74609\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-08-22T16:16:33.407\",\"lastModified\":\"2026-08-25T06:18:37.870\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ntipc: read le-\u003elink under the node lock in tipc_node_link_down()\\n\\ntipc_node_link_down() caches the link pointer before taking n-\u003elock:\\n\\n\\tstruct tipc_link *l = le-\u003elink;\\t\\t/* unlocked */\\n\\n\\tif (!l)\\n\\t\\treturn;\\n\\ttipc_node_write_lock(n);\\n\\tif (!tipc_link_is_establishing(l)) {\\t/* deref l */\\n\\t...\\n\\t\\ttipc_link_reset(l);\\t\\t/* write into l */\\n\\tif (delete) {\\n\\t\\tkfree(l);\\n\\t\\tle-\u003elink = NULL;\\n\\nThe delete=true caller frees that very object under n-\u003elock, so the lock\\ndoes not protect the cached pointer against it:\\n\\n - CPU A, delete=false: tipc_rcv() on TIPC_LINK_DOWN_EVT, or the link\\n   supervision timer via tipc_node_timeout(), reads l unlocked and then\\n   dereferences it under n-\u003elock;\\n - CPU B, delete=true: netlink TIPC_NL_BEARER_DISABLE -\u003e bearer_disable()\\n   -\u003e tipc_node_delete_links() -\u003e tipc_node_link_down(n, bearer_id, true)\\n   -\u003e kfree(l).\\n\\nThe link is freed with plain kfree(), not kfree_rcu(), and for UDP bearers\\ndisable_media() only schedules the asynchronous cleanup_bearer() work, so\\nits synchronize_net() runs after the links are already gone.  An in-flight\\nCPU A that has read l therefore dereferences freed memory once B frees it:\\na use-after-free read in tipc_link_is_establishing(), and a use-after-free\\nwrite via tipc_link_reset() on the establishing branch.\\n\\nThe following trace was captured on 7.2.0-rc5-00284-gaf39eb111ce6:\\n\\n  BUG: KASAN: slab-use-after-free in tipc_link_is_establishing (net/tipc/link.c:285)\\n  Read of size 4 at addr ffff88802e2aa068 by task swapper/2/0\\n   tipc_link_is_establishing (net/tipc/link.c:285)\\n   tipc_node_link_down (net/tipc/node.c:1076)\\n   tipc_node_timeout (net/tipc/node.c:843)\\n  Allocated by task 9549:\\n   tipc_link_create (net/tipc/link.c:490)\\n   tipc_node_check_dest (net/tipc/node.c:1279)\\n   tipc_disc_rcv (net/tipc/discover.c:252)\\n   tipc_udp_recv (net/tipc/udp_media.c:389)\\n  Freed by task 9549:\\n   tipc_node_link_down (net/tipc/node.c:1084)\\n   tipc_node_delete_links (net/tipc/node.c:1320)\\n   bearer_disable (net/tipc/bearer.c:414)\\n   __tipc_nl_bearer_disable (net/tipc/bearer.c:992)\\n\\nMove the le-\u003elink read inside tipc_node_write_lock(), so it is serialised\\nagainst the kfree() in the delete path.  A racing teardown now either has\\nnot run yet, and we see a valid link, or has already run, and we see NULL.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/tipc/node.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"73f646cec35477b5099d7e952297cb9e1855be45\",\"lessThan\":\"2be741ad565c610871a6a95062c12c39da7168fd\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"73f646cec35477b5099d7e952297cb9e1855be45\",\"lessThan\":\"69d209461c110388710e483a130caf051e4fd09a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"73f646cec35477b5099d7e952297cb9e1855be45\",\"lessThan\":\"de017c22135f545ca4e65d1eada22887b64958eb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"73f646cec35477b5099d7e952297cb9e1855be45\",\"lessThan\":\"47ba70891b10b2feb52462086b7fcd2ad75d3ce3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"73f646cec35477b5099d7e952297cb9e1855be45\",\"lessThan\":\"a714d62513befef37f71f4ae89bb1fe173b65f2e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"73f646cec35477b5099d7e952297cb9e1855be45\",\"lessThan\":\"c3f2347a47754eac690967cfd82cb6d559817b07\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"73f646cec35477b5099d7e952297cb9e1855be45\",\"lessThan\":\"5558a8312452ddb21eff22b1cbd84302ad951944\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"73f646cec35477b5099d7e952297cb9e1855be45\",\"lessThan\":\"cba9ccb47e9fa4cc77692fb896cc5ab57a667882\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/tipc/node.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.4\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.4\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.265\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.216\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.183\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.152\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.104\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.45\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.9\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2be741ad565c610871a6a95062c12c39da7168fd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/47ba70891b10b2feb52462086b7fcd2ad75d3ce3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5558a8312452ddb21eff22b1cbd84302ad951944\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/69d209461c110388710e483a130caf051e4fd09a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a714d62513befef37f71f4ae89bb1fe173b65f2e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c3f2347a47754eac690967cfd82cb6d559817b07\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cba9ccb47e9fa4cc77692fb896cc5ab57a667882\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/de017c22135f545ca4e65d1eada22887b64958eb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-25T08:50:46+00:00",
      "cve": "CVE-2026-74609",
      "id": "CVE-2026-74609",
      "initial_release_date": "2026-08-22T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: tipc: read le-\u003elink under the node lock in tipc_node_link_down()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74609.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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.


Detection rules are retrieved from Rulezet.