{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-90157",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-11T19:38:34.790Z",
        "datePublished": "2026-09-17T16:06:49.081Z",
        "dateUpdated": "2026-10-19T08:58:55.961Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T08:58:55.961Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject negative optlen in cgroup getsockopt hook\n\nA cgroup getsockopt BPF program can shrink ctx->optlen after the\nkernel getsockopt handler has run. The kernel-buffer variant, used by\nTCP_ZEROCOPY_RECEIVE, only rejects values larger than the original\nlength.\n\nIf BPF writes a negative optlen, that value is accepted and propagated\nback to the TCP getsockopt code. It can then be passed to\ncopy_to_sockptr() as a size_t and trigger the hardened usercopy\nbytes > INT_MAX warning.\n\nReject negative ctx.optlen in __cgroup_bpf_run_filter_getsockopt_kern(),\nmatching the lower-bound validation already present in the sockptr-based\ngetsockopt hook."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "kernel/bpf/cgroup.c"
                    ],
                    "versions": [
                        {
                            "version": "08f61a34913558e06576e7b6318bf583f273c1be",
                            "lessThan": "5b09d984b38b018b123c3a9e02a96bbc6468dbe5",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9cacf81f8161111db25f98e78a7a0e32ae142b3f",
                            "lessThan": "554ba7195c4108726450e24480c8449990c2268c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9cacf81f8161111db25f98e78a7a0e32ae142b3f",
                            "lessThan": "d02a12b4085ffe41ea750b1007f7a9c7aee2875a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9cacf81f8161111db25f98e78a7a0e32ae142b3f",
                            "lessThan": "e6fbf0eba87f50084d67508898f6ad6fc7ff1ba2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9cacf81f8161111db25f98e78a7a0e32ae142b3f",
                            "lessThan": "f68671b1a98d426c57864bd457c125fee14ac1a5",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9cacf81f8161111db25f98e78a7a0e32ae142b3f",
                            "lessThan": "2bdbe00454200fcb0110f31eeca8d906a3515e74",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9cacf81f8161111db25f98e78a7a0e32ae142b3f",
                            "lessThan": "31a89af4f513d750fec196e2bb6195a7d4473e9f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9cacf81f8161111db25f98e78a7a0e32ae142b3f",
                            "lessThan": "1b5aacd5b2419b0790e955e466d389a61c79b4b1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5.10.188",
                            "lessThan": "5.10.270",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "kernel/bpf/cgroup.c"
                    ],
                    "versions": [
                        {
                            "version": "5.12",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.12",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.270",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.221",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.188",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.157",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.110",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.52",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.6",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "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": "5.10.188",
                                    "versionEndExcluding": "5.10.270"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.12",
                                    "versionEndExcluding": "5.15.221"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.12",
                                    "versionEndExcluding": "6.1.188"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.12",
                                    "versionEndExcluding": "6.6.157"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.12",
                                    "versionEndExcluding": "6.12.110"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.12",
                                    "versionEndExcluding": "6.18.52"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.12",
                                    "versionEndExcluding": "7.2.6"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.12",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/5b09d984b38b018b123c3a9e02a96bbc6468dbe5"
                },
                {
                    "url": "https://git.kernel.org/stable/c/554ba7195c4108726450e24480c8449990c2268c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d02a12b4085ffe41ea750b1007f7a9c7aee2875a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e6fbf0eba87f50084d67508898f6ad6fc7ff1ba2"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f68671b1a98d426c57864bd457c125fee14ac1a5"
                },
                {
                    "url": "https://git.kernel.org/stable/c/2bdbe00454200fcb0110f31eeca8d906a3515e74"
                },
                {
                    "url": "https://git.kernel.org/stable/c/31a89af4f513d750fec196e2bb6195a7d4473e9f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1b5aacd5b2419b0790e955e466d389a61c79b4b1"
                }
            ],
            "title": "bpf: Reject negative optlen in cgroup getsockopt hook",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}