{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-43481",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-05-01T14:12:56.012Z",
        "datePublished": "2026-05-13T15:08:29.116Z",
        "dateUpdated": "2026-08-05T12:28:12.884Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T12:28:12.884Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet-shapers: don't free reply skb after genlmsg_reply()\n\ngenlmsg_reply() hands the reply skb to netlink, and\nnetlink_unicast() consumes it on all return paths, whether the\nskb is queued successfully or freed on an error path.\n\nnet_shaper_nl_get_doit() and net_shaper_nl_cap_get_doit()\ncurrently jump to free_msg after genlmsg_reply() fails and call\nnlmsg_free(msg), which can hit the same skb twice.\n\nReturn the genlmsg_reply() error directly and keep free_msg\nonly for pre-reply failures."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "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"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:L - The vulnerable code is reached by local userspace through AF_NETLINK/NETLINK_GENERIC requests to the net-shaper family, not by received network packets. A plausible cloud/server deployment with a shaper-capable netdev such as MANA or iavf exposes this local control path.\nAC:L - The attacker can directly send the vulnerable GET or CAP_GET request and can make genlmsg_reply() fail by controlling the destination netlink socket state, such as filling its receive queue or closing it. No uncontrollable race or unusual memory-layout prerequisite is needed to trigger the double free.\nPR:L - The affected GET and CAP_GET operations do not have GENL_ADMIN_PERM or GENL_UNS_ADMIN_PERM; only the mutating operations require admin privileges. A basic unprivileged local user in a namespace containing a shaper-capable netdev can reach the vulnerable handlers.\nUI:N - Exploitation only requires the attacker to issue crafted netlink requests. No victim user action is required.\nS:U - The vulnerable component and impacted kernel resources are within the same local kernel security authority. This is standard local kernel compromise/DoS territory, not a VM, IOMMU, or other scope boundary escape.\nC:H - The bug double-frees a netlink reply sk_buff after netlink has already consumed it, creating kernel heap corruption/use-after-free potential. Under the required high-side scoring for memory corruption, this can be leveraged for high confidentiality impact.\nI:H - A double free of an skb is kernel heap memory corruption and can plausibly be shaped into write/control-flow primitives. Under the required high-side scoring for UAF-style corruption, integrity impact is high.\nA:H - Even without full exploitation, the double free can trigger allocator corruption, refcount faults, oopses, or panics. The attacker can repeatedly trigger the local netlink path, so availability impact is high."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/shaper/shaper.c"
                    ],
                    "versions": [
                        {
                            "version": "4b623f9f0f59652ea71fcb27d60b4c3b65126dbb",
                            "lessThan": "8738dcc844fff7d0157ee775230e95df3b1884d7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4b623f9f0f59652ea71fcb27d60b4c3b65126dbb",
                            "lessThan": "83f7b54242d0abbfce35a55c01322f50962ed3ee",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4b623f9f0f59652ea71fcb27d60b4c3b65126dbb",
                            "lessThan": "57885276cc16a2e2b76282c808a4e84cbecb3aae",
                            "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/shaper/shaper.c"
                    ],
                    "versions": [
                        {
                            "version": "6.13",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.13",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.19",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.9",
                            "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": "6.13",
                                    "versionEndExcluding": "6.18.19"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.13",
                                    "versionEndExcluding": "6.19.9"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.13",
                                    "versionEndExcluding": "7.0"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/8738dcc844fff7d0157ee775230e95df3b1884d7"
                },
                {
                    "url": "https://git.kernel.org/stable/c/83f7b54242d0abbfce35a55c01322f50962ed3ee"
                },
                {
                    "url": "https://git.kernel.org/stable/c/57885276cc16a2e2b76282c808a4e84cbecb3aae"
                }
            ],
            "title": "net-shapers: don't free reply skb after genlmsg_reply()",
            "x_generator": {
                "engine": "bippy-1.2.0"
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    }
}