Vulnerability-Lookup

FKIE_CVE-2026-89488

Vulnerability from fkie_nvd - Published: 2026-09-11 20:19 - Updated: 2026-09-14 13:19

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: openvswitch: Fix CT limit teardown use-after-free Packet processing uses CT limit state under RCU, while netns teardown frees that state under ovs_mutex. The CT limit pointer was neither removed from readers nor protected by a grace period, allowing packet processing to dereference the freed state. An unprivileged user can trigger this bug from a user and network namespace, causing a slab-use-after-free in ovs_ct_execute() when the netns is torn down. Publish the CT limit pointer through RCU, remove it before teardown, and wait for readers before freeing its contents. Keep ovs_mutex around individual CT limit updates, and use the RCU read-side lock while GET traverses the RCU-protected limit lists. Netns teardown detaches the RCU-protected CT limit state in the pernet .pre_exit callback while holding ovs_mutex. The pernet core guarantees an RCU grace period between the .pre_exit and .exit callbacks, so the .exit callback completes the teardown without adding any extra synchronization. The netlink command handlers do not need NULL checks because the userspace netlink socket holds an active reference to its network namespace while a request is processed. The per-netns exit path therefore cannot run concurrently with SET, DEL, or GET for that socket's namespace.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/239f26589a6926db28c436e14f28517581ef1385
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3b41d907400cc1dd1da9555b81dca422b1f44433
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3b9369881b403f4cdbb11fa998554382bdcc3d8c
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/403f96c32c9e24600093d7d0c61c17daeedca957
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/680f20d5937fa4d1367c59fe83091b78041015f5
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6a6d36fadb8537d9b79e72c9fa51885ec0c33e10
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/bf4aaa7ea2579e24ed7de2e20578a875bebca011
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e15407c3a8a005324f633cd46cd8fb58042c1157

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/openvswitch/conntrack.c",
            "net/openvswitch/conntrack.h",
            "net/openvswitch/datapath.c",
            "net/openvswitch/datapath.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "239f26589a6926db28c436e14f28517581ef1385",
              "status": "affected",
              "version": "11efd5cb04a184eea4f57b68ea63dddd463158d1",
              "versionType": "git"
            },
            {
              "lessThan": "3b9369881b403f4cdbb11fa998554382bdcc3d8c",
              "status": "affected",
              "version": "11efd5cb04a184eea4f57b68ea63dddd463158d1",
              "versionType": "git"
            },
            {
              "lessThan": "3b41d907400cc1dd1da9555b81dca422b1f44433",
              "status": "affected",
              "version": "11efd5cb04a184eea4f57b68ea63dddd463158d1",
              "versionType": "git"
            },
            {
              "lessThan": "680f20d5937fa4d1367c59fe83091b78041015f5",
              "status": "affected",
              "version": "11efd5cb04a184eea4f57b68ea63dddd463158d1",
              "versionType": "git"
            },
            {
              "lessThan": "bf4aaa7ea2579e24ed7de2e20578a875bebca011",
              "status": "affected",
              "version": "11efd5cb04a184eea4f57b68ea63dddd463158d1",
              "versionType": "git"
            },
            {
              "lessThan": "e15407c3a8a005324f633cd46cd8fb58042c1157",
              "status": "affected",
              "version": "11efd5cb04a184eea4f57b68ea63dddd463158d1",
              "versionType": "git"
            },
            {
              "lessThan": "6a6d36fadb8537d9b79e72c9fa51885ec0c33e10",
              "status": "affected",
              "version": "11efd5cb04a184eea4f57b68ea63dddd463158d1",
              "versionType": "git"
            },
            {
              "lessThan": "403f96c32c9e24600093d7d0c61c17daeedca957",
              "status": "affected",
              "version": "11efd5cb04a184eea4f57b68ea63dddd463158d1",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/openvswitch/conntrack.c",
            "net/openvswitch/conntrack.h",
            "net/openvswitch/datapath.c",
            "net/openvswitch/datapath.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.18"
            },
            {
              "lessThan": "4.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nopenvswitch: Fix CT limit teardown use-after-free\n\nPacket processing uses CT limit state under RCU, while netns teardown\nfrees that state under ovs_mutex. The CT limit pointer was neither removed\nfrom readers nor protected by a grace period, allowing packet processing to\ndereference the freed state.\n\nAn unprivileged user can trigger this bug from a user and network\nnamespace, causing a slab-use-after-free in ovs_ct_execute() when the\nnetns is torn down.\n\nPublish the CT limit pointer through RCU, remove it before teardown, and\nwait for readers before freeing its contents. Keep ovs_mutex around\nindividual CT limit updates, and use the RCU read-side lock while GET\ntraverses the RCU-protected limit lists.\n\nNetns teardown detaches the RCU-protected CT limit state in the pernet\n.pre_exit callback while holding ovs_mutex.  The pernet core guarantees an\nRCU grace period between the .pre_exit and .exit callbacks, so the .exit\ncallback completes the teardown without adding any extra synchronization.\n\nThe netlink command handlers do not need NULL checks because the userspace\nnetlink socket holds an active reference to its network namespace while a\nrequest is processed. The per-netns exit path therefore cannot run\nconcurrently with SET, DEL, or GET for that socket\u0027s namespace."
    }
  ],
  "id": "CVE-2026-89488",
  "lastModified": "2026-09-14T13:19:05.627",
  "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"
      }
    ]
  },
  "published": "2026-09-11T20:19:30.557",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/239f26589a6926db28c436e14f28517581ef1385"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3b41d907400cc1dd1da9555b81dca422b1f44433"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3b9369881b403f4cdbb11fa998554382bdcc3d8c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/403f96c32c9e24600093d7d0c61c17daeedca957"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/680f20d5937fa4d1367c59fe83091b78041015f5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6a6d36fadb8537d9b79e72c9fa51885ec0c33e10"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bf4aaa7ea2579e24ed7de2e20578a875bebca011"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e15407c3a8a005324f633cd46cd8fb58042c1157"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-89488 (GCVE-0-2026-89488)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:43 – Updated: 2026-09-14 12:00

Title

openvswitch: Fix CT limit teardown use-after-free

Summary

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 mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/239f26589a6926db2…
https://git.kernel.org/stable/c/3b9369881b403f4cd…
https://git.kernel.org/stable/c/3b41d907400cc1dd1…
https://git.kernel.org/stable/c/680f20d5937fa4d13…
https://git.kernel.org/stable/c/bf4aaa7ea2579e24e…
https://git.kernel.org/stable/c/e15407c3a8a005324…
https://git.kernel.org/stable/c/6a6d36fadb8537d9b…
https://git.kernel.org/stable/c/403f96c32c9e24600…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 11efd5cb04a184eea4f57b68ea63dddd463158d1 , < 239f26589a6926db28c436e14f28517581ef1385 (git) Affected: 11efd5cb04a184eea4f57b68ea63dddd463158d1 , < 3b9369881b403f4cdbb11fa998554382bdcc3d8c (git) Affected: 11efd5cb04a184eea4f57b68ea63dddd463158d1 , < 3b41d907400cc1dd1da9555b81dca422b1f44433 (git) Affected: 11efd5cb04a184eea4f57b68ea63dddd463158d1 , < 680f20d5937fa4d1367c59fe83091b78041015f5 (git) Affected: 11efd5cb04a184eea4f57b68ea63dddd463158d1 , < bf4aaa7ea2579e24ed7de2e20578a875bebca011 (git) Affected: 11efd5cb04a184eea4f57b68ea63dddd463158d1 , < e15407c3a8a005324f633cd46cd8fb58042c1157 (git) Affected: 11efd5cb04a184eea4f57b68ea63dddd463158d1 , < 6a6d36fadb8537d9b79e72c9fa51885ec0c33e10 (git) Affected: 11efd5cb04a184eea4f57b68ea63dddd463158d1 , < 403f96c32c9e24600093d7d0c61c17daeedca957 (git)
Linux	Linux	Affected: 4.18 Unaffected: 0 , < 4.18 (semver) Unaffected: 5.10.270 , ≤ 5.10.* (semver) Unaffected: 5.15.221 , ≤ 5.15.* (semver) Unaffected: 6.1.188 , ≤ 6.1.* (semver) Unaffected: 6.6.157 , ≤ 6.6.* (semver) Unaffected: 6.12.110 , ≤ 6.12.* (semver) Unaffected: 6.18.51 , ≤ 6.18.* (semver) Unaffected: 7.2.4 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/openvswitch/conntrack.c",
            "net/openvswitch/conntrack.h",
            "net/openvswitch/datapath.c",
            "net/openvswitch/datapath.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "239f26589a6926db28c436e14f28517581ef1385",
              "status": "affected",
              "version": "11efd5cb04a184eea4f57b68ea63dddd463158d1",
              "versionType": "git"
            },
            {
              "lessThan": "3b9369881b403f4cdbb11fa998554382bdcc3d8c",
              "status": "affected",
              "version": "11efd5cb04a184eea4f57b68ea63dddd463158d1",
              "versionType": "git"
            },
            {
              "lessThan": "3b41d907400cc1dd1da9555b81dca422b1f44433",
              "status": "affected",
              "version": "11efd5cb04a184eea4f57b68ea63dddd463158d1",
              "versionType": "git"
            },
            {
              "lessThan": "680f20d5937fa4d1367c59fe83091b78041015f5",
              "status": "affected",
              "version": "11efd5cb04a184eea4f57b68ea63dddd463158d1",
              "versionType": "git"
            },
            {
              "lessThan": "bf4aaa7ea2579e24ed7de2e20578a875bebca011",
              "status": "affected",
              "version": "11efd5cb04a184eea4f57b68ea63dddd463158d1",
              "versionType": "git"
            },
            {
              "lessThan": "e15407c3a8a005324f633cd46cd8fb58042c1157",
              "status": "affected",
              "version": "11efd5cb04a184eea4f57b68ea63dddd463158d1",
              "versionType": "git"
            },
            {
              "lessThan": "6a6d36fadb8537d9b79e72c9fa51885ec0c33e10",
              "status": "affected",
              "version": "11efd5cb04a184eea4f57b68ea63dddd463158d1",
              "versionType": "git"
            },
            {
              "lessThan": "403f96c32c9e24600093d7d0c61c17daeedca957",
              "status": "affected",
              "version": "11efd5cb04a184eea4f57b68ea63dddd463158d1",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/openvswitch/conntrack.c",
            "net/openvswitch/conntrack.h",
            "net/openvswitch/datapath.c",
            "net/openvswitch/datapath.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.18"
            },
            {
              "lessThan": "4.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.270",
                  "versionStartIncluding": "4.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.221",
                  "versionStartIncluding": "4.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.188",
                  "versionStartIncluding": "4.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.157",
                  "versionStartIncluding": "4.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.110",
                  "versionStartIncluding": "4.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.51",
                  "versionStartIncluding": "4.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.4",
                  "versionStartIncluding": "4.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "4.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nopenvswitch: Fix CT limit teardown use-after-free\n\nPacket processing uses CT limit state under RCU, while netns teardown\nfrees that state under ovs_mutex. The CT limit pointer was neither removed\nfrom readers nor protected by a grace period, allowing packet processing to\ndereference the freed state.\n\nAn unprivileged user can trigger this bug from a user and network\nnamespace, causing a slab-use-after-free in ovs_ct_execute() when the\nnetns is torn down.\n\nPublish the CT limit pointer through RCU, remove it before teardown, and\nwait for readers before freeing its contents. Keep ovs_mutex around\nindividual CT limit updates, and use the RCU read-side lock while GET\ntraverses the RCU-protected limit lists.\n\nNetns teardown detaches the RCU-protected CT limit state in the pernet\n.pre_exit callback while holding ovs_mutex.  The pernet core guarantees an\nRCU grace period between the .pre_exit and .exit callbacks, so the .exit\ncallback completes the teardown without adding any extra synchronization.\n\nThe netlink command handlers do not need NULL checks because the userspace\nnetlink socket holds an active reference to its network namespace while a\nrequest is processed. The per-netns exit path therefore cannot run\nconcurrently with SET, DEL, or GET for that socket\u0027s namespace."
        }
      ],
      "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 is reached from the OVS datapath CT commit path (ovs_ct_execute/ovs_ct_check_limit) while the attacker\u0027s netns is torn down. Setup uses local genetlink (datapath, CT flow, CT_LIMIT SET) and packet injection via a vport (veth/TUN/internal) or OVS_PACKET_CMD_EXECUTE; this is not a remotely triggered protocol parser.\nAC:L - The attacker controls both sides of the race: they enable CT limits, install a CT-commit flow, inject packets so ovs_ct_check_limit runs under RCU, and destroy the netns so ovs_ct_limit_exit kfree()s the same object without a grace period. Success does not depend on victim-only timing.\nPR:L - OVS genetlink families are netnsok and use GENL_UNS_ADMIN_PERM, so CAP_NET_ADMIN is checked in the socket\u0027s user namespace (unshare -Urn). The fix commit states an unprivileged user can trigger the slab-use-after-free from a user and network namespace.\nUI:N - Exploitation needs only the attacker\u0027s own netlink setup, packet injection, and netns teardown. No victim action such as mounting a filesystem, opening a file, or clicking a prompt is required.\nS:U - This is kernel slab use-after-free in the host Open vSwitch datapath. Impact stays in the same kernel security authority and is not a VM escape, IOMMU/DMA bypass, or other cross-boundary compromise.\nC:H - ovs_ct_check_limit/ct_limit_get dereference freed ovs_ct_limit_info and walk its kmalloc\u0027d limits hlist after ovs_ct_limit_exit kfree()s them, a slab UAF that can be reclaimed and used for arbitrary kernel reads.\nI:H - With a finite zone limit, nf_conncount_count_skb() inserts into nf_conncount_data after nf_conncount_destroy(); combined with UAF of the limits table this is a write-after-free/heap primitive that can be turned into arbitrary write or control-flow hijack.\nA:H - The commit reports a slab-use-after-free in ovs_ct_execute() on netns teardown. UAF of CT-limit and conncount objects can oops/panic the kernel even when not fully exploited for code execution."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-14T12:00:23.517Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/239f26589a6926db28c436e14f28517581ef1385"
        },
        {
          "url": "https://git.kernel.org/stable/c/3b9369881b403f4cdbb11fa998554382bdcc3d8c"
        },
        {
          "url": "https://git.kernel.org/stable/c/3b41d907400cc1dd1da9555b81dca422b1f44433"
        },
        {
          "url": "https://git.kernel.org/stable/c/680f20d5937fa4d1367c59fe83091b78041015f5"
        },
        {
          "url": "https://git.kernel.org/stable/c/bf4aaa7ea2579e24ed7de2e20578a875bebca011"
        },
        {
          "url": "https://git.kernel.org/stable/c/e15407c3a8a005324f633cd46cd8fb58042c1157"
        },
        {
          "url": "https://git.kernel.org/stable/c/6a6d36fadb8537d9b79e72c9fa51885ec0c33e10"
        },
        {
          "url": "https://git.kernel.org/stable/c/403f96c32c9e24600093d7d0c61c17daeedca957"
        }
      ],
      "title": "openvswitch: Fix CT limit teardown use-after-free",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89488",
    "datePublished": "2026-09-11T19:43:41.471Z",
    "dateReserved": "2026-09-11T19:38:34.713Z",
    "dateUpdated": "2026-09-14T12:00:23.517Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.