CVE-2025-37921 (GCVE-0-2025-37921)

Vulnerability from cvelistv5 – Published: 2025-05-20 15:21 – Updated: 2026-08-05 11:58
VLAI
Title
vxlan: vnifilter: Fix unlocked deletion of default FDB entry
Summary
In the Linux kernel, the following vulnerability has been resolved: vxlan: vnifilter: Fix unlocked deletion of default FDB entry When a VNI is deleted from a VXLAN device in 'vnifilter' mode, the FDB entry associated with the default remote (assuming one was configured) is deleted without holding the hash lock. This is wrong and will result in a warning [1] being generated by the lockdep annotation that was added by commit ebe642067455 ("vxlan: Create wrappers for FDB lookup"). Reproducer: # ip link add vx0 up type vxlan dstport 4789 external vnifilter local 192.0.2.1 # bridge vni add vni 10010 remote 198.51.100.1 dev vx0 # bridge vni del vni 10010 dev vx0 Fix by acquiring the hash lock before the deletion and releasing it afterwards. Blame the original commit that introduced the issue rather than the one that exposed it. [1] WARNING: CPU: 3 PID: 392 at drivers/net/vxlan/vxlan_core.c:417 vxlan_find_mac+0x17f/0x1a0 [...] RIP: 0010:vxlan_find_mac+0x17f/0x1a0 [...] Call Trace: <TASK> __vxlan_fdb_delete+0xbe/0x560 vxlan_vni_delete_group+0x2ba/0x940 vxlan_vni_del.isra.0+0x15f/0x580 vxlan_process_vni_filter+0x38b/0x7b0 vxlan_vnifilter_process+0x3bb/0x510 rtnetlink_rcv_msg+0x2f7/0xb70 netlink_rcv_skb+0x131/0x360 netlink_unicast+0x426/0x710 netlink_sendmsg+0x75a/0xc20 __sock_sendmsg+0xc1/0x150 ____sys_sendmsg+0x5aa/0x7b0 ___sys_sendmsg+0xfc/0x180 __sys_sendmsg+0x121/0x1b0 do_syscall_64+0xbb/0x1d0 entry_SYSCALL_64_after_hwframe+0x4b/0x53
Assigner
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: f9c4bb0b245cee35ef66f75bf409c9573d934cf9 , < 2d4a121296aa3940d2df9906f955c2b6b4e38bc3 (git)
Affected: f9c4bb0b245cee35ef66f75bf409c9573d934cf9 , < 3576e9a80b6c4381b01ce0cbaa07f5e92d4492ed (git)
Affected: f9c4bb0b245cee35ef66f75bf409c9573d934cf9 , < 5cb9e07f84e527974b12e82e2549fa6c0cc6eef0 (git)
Affected: f9c4bb0b245cee35ef66f75bf409c9573d934cf9 , < 470206205588559e60035fceb5f256640cb45f99 (git)
Affected: f9c4bb0b245cee35ef66f75bf409c9573d934cf9 , < 087a9eb9e5978e3ba362e1163691e41097e8ca20 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.18
Unaffected: 0 , < 5.18 (semver)
Unaffected: 6.1.138 , ≤ 6.1.* (semver)
Unaffected: 6.6.90 , ≤ 6.6.* (semver)
Unaffected: 6.12.28 , ≤ 6.12.* (semver)
Unaffected: 6.14.6 , ≤ 6.14.* (semver)
Unaffected: 6.15 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T19:57:20.614Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/vxlan/vxlan_vnifilter.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2d4a121296aa3940d2df9906f955c2b6b4e38bc3",
              "status": "affected",
              "version": "f9c4bb0b245cee35ef66f75bf409c9573d934cf9",
              "versionType": "git"
            },
            {
              "lessThan": "3576e9a80b6c4381b01ce0cbaa07f5e92d4492ed",
              "status": "affected",
              "version": "f9c4bb0b245cee35ef66f75bf409c9573d934cf9",
              "versionType": "git"
            },
            {
              "lessThan": "5cb9e07f84e527974b12e82e2549fa6c0cc6eef0",
              "status": "affected",
              "version": "f9c4bb0b245cee35ef66f75bf409c9573d934cf9",
              "versionType": "git"
            },
            {
              "lessThan": "470206205588559e60035fceb5f256640cb45f99",
              "status": "affected",
              "version": "f9c4bb0b245cee35ef66f75bf409c9573d934cf9",
              "versionType": "git"
            },
            {
              "lessThan": "087a9eb9e5978e3ba362e1163691e41097e8ca20",
              "status": "affected",
              "version": "f9c4bb0b245cee35ef66f75bf409c9573d934cf9",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/vxlan/vxlan_vnifilter.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.18"
            },
            {
              "lessThan": "5.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.138",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.90",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.28",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.14.*",
              "status": "unaffected",
              "version": "6.14.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.15",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.138",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.90",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.28",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.14.6",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.15",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvxlan: vnifilter: Fix unlocked deletion of default FDB entry\n\nWhen a VNI is deleted from a VXLAN device in \u0027vnifilter\u0027 mode, the FDB\nentry associated with the default remote (assuming one was configured)\nis deleted without holding the hash lock. This is wrong and will result\nin a warning [1] being generated by the lockdep annotation that was\nadded by commit ebe642067455 (\"vxlan: Create wrappers for FDB lookup\").\n\nReproducer:\n\n # ip link add vx0 up type vxlan dstport 4789 external vnifilter local 192.0.2.1\n # bridge vni add vni 10010 remote 198.51.100.1 dev vx0\n # bridge vni del vni 10010 dev vx0\n\nFix by acquiring the hash lock before the deletion and releasing it\nafterwards. Blame the original commit that introduced the issue rather\nthan the one that exposed it.\n\n[1]\nWARNING: CPU: 3 PID: 392 at drivers/net/vxlan/vxlan_core.c:417 vxlan_find_mac+0x17f/0x1a0\n[...]\nRIP: 0010:vxlan_find_mac+0x17f/0x1a0\n[...]\nCall Trace:\n \u003cTASK\u003e\n __vxlan_fdb_delete+0xbe/0x560\n vxlan_vni_delete_group+0x2ba/0x940\n vxlan_vni_del.isra.0+0x15f/0x580\n vxlan_process_vni_filter+0x38b/0x7b0\n vxlan_vnifilter_process+0x3bb/0x510\n rtnetlink_rcv_msg+0x2f7/0xb70\n netlink_rcv_skb+0x131/0x360\n netlink_unicast+0x426/0x710\n netlink_sendmsg+0x75a/0xc20\n __sock_sendmsg+0xc1/0x150\n ____sys_sendmsg+0x5aa/0x7b0\n ___sys_sendmsg+0xfc/0x180\n __sys_sendmsg+0x121/0x1b0\n do_syscall_64+0xbb/0x1d0\n entry_SYSCALL_64_after_hwframe+0x4b/0x53"
        }
      ],
      "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 trigger is an RTM_DELTUNNEL rtnetlink message on the PF_BRIDGE family (`bridge vni del`), which requires a local socket; the racing FDB writes come from the packet path but the vulnerable unlocked deletion itself is only reachable locally.\nAC:L - The attacker owns both sides of the race \u2014 looping `bridge vni add/del` on one CPU while feeding VXLAN frames with chosen inner source MACs (spraying all 256 buckets) to drive `vxlan_snoop()` inserts into the same bucket \u2014 and it can be retried indefinitely; the lockdep WARN itself reproduces deterministically in three commands.\nPR:L - Only CAP_NET_ADMIN in the netns\u0027s user namespace is needed, checked via `netlink_net_capable()`, so an unprivileged user gets it with `unshare -Urn` and can create the vxlan vnifilter device and delete VNIs entirely within their own namespace.\nUI:N - The attacker performs every step \u2014 device creation, VNI add/delete, and packet injection \u2014 with no action by any other user or administrator.\nS:U - The corruption stays within the kernel\u0027s own security authority; this is standard in-kernel memory corruption / privilege escalation with no VM, IOMMU, or hypervisor boundary crossed.\nC:H - The lost-update on the hash bucket leaves a `call_rcu`-freed `vxlan_fdb` linked in the table, so subsequent lookups read freed memory and `vxlan_fdb_notify()` copies that reclaimed object\u0027s contents out to netlink listeners, yielding attacker-observable kernel heap disclosure.\nI:H - The use-after-free is writable \u2014 `vxlan_snoop()` stores jiffies into `f-\u003eupdated` and a 16-byte peer-controlled `union vxlan_addr` into `rdst-\u003eremote_ip` inside the reclaimed object, and corrupted `pprev` pointers produce stray writes into reallocated slab memory, giving a heap-spray-based write primitive.\nA:H - The immediate observed effect is a kernel WARNING from `lockdep_assert_held_once()` (fatal under panic_on_warn), and the underlying list corruption and use-after-free reliably lead to oopses and panics on the VXLAN datapath."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:58:22.938Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2d4a121296aa3940d2df9906f955c2b6b4e38bc3"
        },
        {
          "url": "https://git.kernel.org/stable/c/3576e9a80b6c4381b01ce0cbaa07f5e92d4492ed"
        },
        {
          "url": "https://git.kernel.org/stable/c/5cb9e07f84e527974b12e82e2549fa6c0cc6eef0"
        },
        {
          "url": "https://git.kernel.org/stable/c/470206205588559e60035fceb5f256640cb45f99"
        },
        {
          "url": "https://git.kernel.org/stable/c/087a9eb9e5978e3ba362e1163691e41097e8ca20"
        }
      ],
      "title": "vxlan: vnifilter: Fix unlocked deletion of default FDB entry",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-37921",
    "datePublished": "2025-05-20T15:21:50.410Z",
    "dateReserved": "2025-04-16T04:51:23.968Z",
    "dateUpdated": "2026-08-05T11:58:22.938Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-37921",
      "date": "2026-08-17",
      "epss": "0.00185",
      "percentile": "0.08348"
    },
    "microsoft_vex": {
      "current_release_date": "2026-02-18T03:02:47.000Z",
      "cve": "CVE-2025-37921",
      "id": "msrc_CVE-2025-37921",
      "initial_release_date": "2025-05-02T00:00:00.000Z",
      "product_status:fixed": "2",
      "product_status:known_affected": "2",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "vxlan: vnifilter: Fix unlocked deletion of default FDB entry",
      "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-37921.json",
      "version": "2"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-37921\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-05-20T16:15:28.713\",\"lastModified\":\"2026-07-30T06:22:33.797\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nvxlan: vnifilter: Fix unlocked deletion of default FDB entry\\n\\nWhen a VNI is deleted from a VXLAN device in \u0027vnifilter\u0027 mode, the FDB\\nentry associated with the default remote (assuming one was configured)\\nis deleted without holding the hash lock. This is wrong and will result\\nin a warning [1] being generated by the lockdep annotation that was\\nadded by commit ebe642067455 (\\\"vxlan: Create wrappers for FDB lookup\\\").\\n\\nReproducer:\\n\\n # ip link add vx0 up type vxlan dstport 4789 external vnifilter local 192.0.2.1\\n # bridge vni add vni 10010 remote 198.51.100.1 dev vx0\\n # bridge vni del vni 10010 dev vx0\\n\\nFix by acquiring the hash lock before the deletion and releasing it\\nafterwards. Blame the original commit that introduced the issue rather\\nthan the one that exposed it.\\n\\n[1]\\nWARNING: CPU: 3 PID: 392 at drivers/net/vxlan/vxlan_core.c:417 vxlan_find_mac+0x17f/0x1a0\\n[...]\\nRIP: 0010:vxlan_find_mac+0x17f/0x1a0\\n[...]\\nCall Trace:\\n \u003cTASK\u003e\\n __vxlan_fdb_delete+0xbe/0x560\\n vxlan_vni_delete_group+0x2ba/0x940\\n vxlan_vni_del.isra.0+0x15f/0x580\\n vxlan_process_vni_filter+0x38b/0x7b0\\n vxlan_vnifilter_process+0x3bb/0x510\\n rtnetlink_rcv_msg+0x2f7/0xb70\\n netlink_rcv_skb+0x131/0x360\\n netlink_unicast+0x426/0x710\\n netlink_sendmsg+0x75a/0xc20\\n __sock_sendmsg+0xc1/0x150\\n ____sys_sendmsg+0x5aa/0x7b0\\n ___sys_sendmsg+0xfc/0x180\\n __sys_sendmsg+0x121/0x1b0\\n do_syscall_64+0xbb/0x1d0\\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: vxlan: vnifilter: Se corrige la eliminaci\u00f3n desbloqueada de la entrada FDB predeterminada. Cuando se elimina una VNI de un dispositivo VXLAN en modo \u0027vnifilter\u0027, la entrada FDB asociada al control remoto predeterminado (si se configur\u00f3 uno) se elimina sin mantener el bloqueo hash. Esto es incorrecto y generar\u00e1 una advertencia [1] generada por la anotaci\u00f3n lockdep, a\u00f1adida por el commit ebe642067455 (\\\"vxlan: Crear envoltorios para la b\u00fasqueda FDB\\\"). Reproductor: # ip link add vx0 up type vxlan dstport 4789 external vnifilter local 192.0.2.1 # bridge vni add vni 10010 remote 198.51.100.1 dev vx0 # bridge vni del vni 10010 dev vx0 Se corrige adquiriendo el bloqueo hash antes de la eliminaci\u00f3n y liber\u00e1ndolo despu\u00e9s. Culpe a el commit original que introdujo el problema en lugar de a la que lo expuso. [1] ADVERTENCIA: CPU: 3 PID: 392 en drivers/net/vxlan/vxlan_core.c:417 vxlan_find_mac+0x17f/0x1a0 [...] RIP: 0010:vxlan_find_mac+0x17f/0x1a0 [...] Rastreo de llamadas:  __vxlan_fdb_delete+0xbe/0x560 vxlan_vni_delete_group+0x2ba/0x940 vxlan_vni_del.isra.0+0x15f/0x580 vxlan_process_vni_filter+0x38b/0x7b0 vxlan_vnifilter_process+0x3bb/0x510 rtnetlink_rcv_msg+0x2f7/0xb70 netlink_rcv_skb+0x131/0x360 netlink_unicast+0x426/0x710 netlink_sendmsg+0x75a/0xc20 __sock_sendmsg+0xc1/0x150 ____sys_sendmsg+0x5aa/0x7b0 ___sys_sendmsg+0xfc/0x180 __sys_sendmsg+0x121/0x1b0 do_syscall_64+0xbb/0x1d0 entry_SYSCALL_64_after_hwframe+0x4b/0x53 \"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/vxlan/vxlan_vnifilter.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"f9c4bb0b245cee35ef66f75bf409c9573d934cf9\",\"lessThan\":\"2d4a121296aa3940d2df9906f955c2b6b4e38bc3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f9c4bb0b245cee35ef66f75bf409c9573d934cf9\",\"lessThan\":\"3576e9a80b6c4381b01ce0cbaa07f5e92d4492ed\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f9c4bb0b245cee35ef66f75bf409c9573d934cf9\",\"lessThan\":\"5cb9e07f84e527974b12e82e2549fa6c0cc6eef0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f9c4bb0b245cee35ef66f75bf409c9573d934cf9\",\"lessThan\":\"470206205588559e60035fceb5f256640cb45f99\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f9c4bb0b245cee35ef66f75bf409c9573d934cf9\",\"lessThan\":\"087a9eb9e5978e3ba362e1163691e41097e8ca20\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/vxlan/vxlan_vnifilter.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.18\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.18\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.138\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.90\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.28\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.14.6\",\"lessThanOrEqual\":\"6.14.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.15\",\"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},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"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}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.18\",\"versionEndExcluding\":\"6.1.138\",\"matchCriteriaId\":\"945A1B5D-9E16-488D-96CC-27B5994A3A7F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.90\",\"matchCriteriaId\":\"2BE1DB09-2D62-4C63-AF19-947300669741\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.28\",\"matchCriteriaId\":\"5082CE19-0F3D-4521-AB3E-810D8255F500\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.14.6\",\"matchCriteriaId\":\"19E5095E-5950-43EA-8E78-FC860855293F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"8D465631-2980-487A-8E65-40AE2B9F8ED1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.15:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"4C9D071F-B28E-46EC-AC61-22B913390211\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.15:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"13FC0DDE-E513-465E-9E81-515702D49B74\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.15:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"8C7B5B0E-4EEB-48F5-B4CF-0935A7633845\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"FA6FEEC2-9F11-4643-8827-749718254FED\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/087a9eb9e5978e3ba362e1163691e41097e8ca20\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/2d4a121296aa3940d2df9906f955c2b6b4e38bc3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3576e9a80b6c4381b01ce0cbaa07f5e92d4492ed\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/470206205588559e60035fceb5f256640cb45f99\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/5cb9e07f84e527974b12e82e2549fa6c0cc6eef0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-30T09:27:59+00:00",
      "cve": "CVE-2025-37921",
      "id": "CVE-2025-37921",
      "initial_release_date": "2025-05-20T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: vxlan: vnifilter: Fix unlocked deletion of default FDB entry",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-37921.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-25T00:54:34Z",
      "cve": "CVE-2025-37921",
      "id": "CVE-2025-37921",
      "initial_release_date": "2025-05-21T00:47:01Z",
      "product_status:known_affected": "440",
      "product_status:known_not_affected": "277",
      "product_status:recommended": "407",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-37921",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-37921.json",
      "version": "40"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

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.

Loading…

Detection rules are retrieved from Rulezet.

Loading…

Loading…

Loading…