{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "705dd34440812735ece298eb5bc153fde9544d42"
            },
            {
              "fixed": "730663352c9178f33fcf5929f4a37c1f1ca5a693"
            },
            {
              "fixed": "4039959315008888dd53c37674d33351817a5166"
            },
            {
              "fixed": "a32dabacee111cea083ddd57a03635672e1bff29"
            },
            {
              "fixed": "c2ddbe577e2ebf63f2d8fb15cdc7503af70f3e94"
            },
            {
              "fixed": "9a91797e61d286805ae10a92cc48959c30800556"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.136"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.83"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.24"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.14"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43086.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nipvs: fix NULL deref in ip_vs_add_service error path\n\nWhen ip_vs_bind_scheduler() succeeds in ip_vs_add_service(), the local\nvariable sched is set to NULL.  If ip_vs_start_estimator() subsequently\nfails, the out_err cleanup calls ip_vs_unbind_scheduler(svc, sched)\nwith sched == NULL.  ip_vs_unbind_scheduler() passes the cur_sched NULL\ncheck (because svc-\u003escheduler was set by the successful bind) but then\ndereferences the NULL sched parameter at sched-\u003edone_service, causing a\nkernel panic at offset 0x30 from NULL.\n\n Oops: general protection fault, [..] [#1] PREEMPT SMP KASAN NOPTI\n KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]\n RIP: 0010:ip_vs_unbind_scheduler (net/netfilter/ipvs/ip_vs_sched.c:69)\n Call Trace:\n  \u003cTASK\u003e\n  ip_vs_add_service.isra.0 (net/netfilter/ipvs/ip_vs_ctl.c:1500)\n  do_ip_vs_set_ctl (net/netfilter/ipvs/ip_vs_ctl.c:2809)\n  nf_setsockopt (net/netfilter/nf_sockopt.c:102)\n  [..]\n\nFix by simply not clearing the local sched variable after a successful\nbind.  ip_vs_unbind_scheduler() already detects whether a scheduler is\ninstalled via svc-\u003escheduler, and keeping sched non-NULL ensures the\nerror path passes the correct pointer to both ip_vs_unbind_scheduler()\nand ip_vs_scheduler_put().\n\nWhile the bug is older, the problem popups in more recent kernels (6.2),\nwhen the new error path is taken after the ip_vs_start_estimator() call.",
  "id": "CVE-2026-43086",
  "modified": "2026-07-15T01:48:50.871424709Z",
  "published": "2026-05-06T07:40:20.631Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4039959315008888dd53c37674d33351817a5166"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/730663352c9178f33fcf5929f4a37c1f1ca5a693"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9a91797e61d286805ae10a92cc48959c30800556"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a32dabacee111cea083ddd57a03635672e1bff29"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c2ddbe577e2ebf63f2d8fb15cdc7503af70f3e94"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43086.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43086"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "ipvs: fix NULL deref in ip_vs_add_service error path"
}