{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-43086",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-05-01T14:12:55.983Z",
        "datePublished": "2026-05-06T07:40:20.631Z",
        "dateUpdated": "2026-05-11T22:17:27.288Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T22:17:27.288Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "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->scheduler was set by the successful bind) but then\ndereferences the NULL sched parameter at sched->done_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  <TASK>\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->scheduler, 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."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/netfilter/ipvs/ip_vs_ctl.c"
                    ],
                    "versions": [
                        {
                            "version": "705dd34440812735ece298eb5bc153fde9544d42",
                            "lessThan": "730663352c9178f33fcf5929f4a37c1f1ca5a693",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "705dd34440812735ece298eb5bc153fde9544d42",
                            "lessThan": "4039959315008888dd53c37674d33351817a5166",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "705dd34440812735ece298eb5bc153fde9544d42",
                            "lessThan": "a32dabacee111cea083ddd57a03635672e1bff29",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "705dd34440812735ece298eb5bc153fde9544d42",
                            "lessThan": "c2ddbe577e2ebf63f2d8fb15cdc7503af70f3e94",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "705dd34440812735ece298eb5bc153fde9544d42",
                            "lessThan": "9a91797e61d286805ae10a92cc48959c30800556",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/netfilter/ipvs/ip_vs_ctl.c"
                    ],
                    "versions": [
                        {
                            "version": "6.2",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.2",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.136",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.83",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.24",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.14",
                            "lessThanOrEqual": "6.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.2",
                                    "versionEndExcluding": "6.6.136"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.2",
                                    "versionEndExcluding": "6.12.83"
                                },
                                {
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.2",
                                    "versionEndExcluding": "6.18.24"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                                    "versionEndExcluding": "6.19.14"
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                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.2",
                                    "versionEndExcluding": "7.0"
                                }
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                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/730663352c9178f33fcf5929f4a37c1f1ca5a693"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4039959315008888dd53c37674d33351817a5166"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a32dabacee111cea083ddd57a03635672e1bff29"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c2ddbe577e2ebf63f2d8fb15cdc7503af70f3e94"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9a91797e61d286805ae10a92cc48959c30800556"
                }
            ],
            "title": "ipvs: fix NULL deref in ip_vs_add_service error path",
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}