{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-31660",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-03-09T15:48:24.129Z",
        "datePublished": "2026-04-24T14:45:11.039Z",
        "dateUpdated": "2026-05-11T22:13:07.366Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T22:13:07.366Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: pn533: allocate rx skb before consuming bytes\n\npn532_receive_buf() reports the number of accepted bytes to the serdev\ncore. The current code consumes bytes into recv_skb and may already hand\na complete frame to pn533_recv_frame() before allocating a fresh receive\nbuffer.\n\nIf that alloc_skb() fails, the callback returns 0 even though it has\nalready consumed bytes, and it leaves recv_skb as NULL for the next\nreceive callback. That breaks the receive_buf() accounting contract and\ncan also lead to a NULL dereference on the next skb_put_u8().\n\nAllocate the receive skb lazily before consuming the next byte instead.\nIf allocation fails, return the number of bytes already accepted."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/nfc/pn533/uart.c"
                    ],
                    "versions": [
                        {
                            "version": "c656aa4c27b17a8c70da223ed5ab42145800d6b5",
                            "lessThan": "2ca64fb7e2d2ae14619dd204d4f2f0a601f421fb",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c656aa4c27b17a8c70da223ed5ab42145800d6b5",
                            "lessThan": "8b71299d587d9e4c830c18afb884c80ddb30ad28",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c656aa4c27b17a8c70da223ed5ab42145800d6b5",
                            "lessThan": "16649adc2e19509104245ea1f349b629d858f11f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c656aa4c27b17a8c70da223ed5ab42145800d6b5",
                            "lessThan": "07cb6c72e66ba548679f22ac29ad588da8999279",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c656aa4c27b17a8c70da223ed5ab42145800d6b5",
                            "lessThan": "a9495069b43b8634c1ae0042e888766c34f66637",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c656aa4c27b17a8c70da223ed5ab42145800d6b5",
                            "lessThan": "21ae2cda66a55c759607bbf1d23cbaa42019d2de",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c656aa4c27b17a8c70da223ed5ab42145800d6b5",
                            "lessThan": "7e37da42eda45d7859d9273fc7e225d8df458038",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c656aa4c27b17a8c70da223ed5ab42145800d6b5",
                            "lessThan": "c71ba669b570c7b3f86ec875be222ea11dacb352",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/nfc/pn533/uart.c"
                    ],
                    "versions": [
                        {
                            "version": "5.5",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.5",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.253",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.203",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.169",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.135",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.82",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.23",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.13",
                            "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": "5.5",
                                    "versionEndExcluding": "5.10.253"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.5",
                                    "versionEndExcluding": "5.15.203"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.5",
                                    "versionEndExcluding": "6.1.169"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.5",
                                    "versionEndExcluding": "6.6.135"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.5",
                                    "versionEndExcluding": "6.12.82"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.5",
                                    "versionEndExcluding": "6.18.23"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.5",
                                    "versionEndExcluding": "6.19.13"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.5",
                                    "versionEndExcluding": "7.0"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/2ca64fb7e2d2ae14619dd204d4f2f0a601f421fb"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8b71299d587d9e4c830c18afb884c80ddb30ad28"
                },
                {
                    "url": "https://git.kernel.org/stable/c/16649adc2e19509104245ea1f349b629d858f11f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/07cb6c72e66ba548679f22ac29ad588da8999279"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a9495069b43b8634c1ae0042e888766c34f66637"
                },
                {
                    "url": "https://git.kernel.org/stable/c/21ae2cda66a55c759607bbf1d23cbaa42019d2de"
                },
                {
                    "url": "https://git.kernel.org/stable/c/7e37da42eda45d7859d9273fc7e225d8df458038"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c71ba669b570c7b3f86ec875be222ea11dacb352"
                }
            ],
            "title": "nfc: pn533: allocate rx skb before consuming bytes",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}