{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-53158",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-06-09T07:44:35.388Z",
        "datePublished": "2026-06-25T08:38:40.818Z",
        "dateUpdated": "2026-07-04T11:50:56.161Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-07-04T11:50:56.161Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: fastrpc: Fix NULL pointer dereference in rpmsg callback\n\nA NULL pointer dereference was observed on Hawi at boot when the DSP\nsends a glink message before fastrpc_rpmsg_probe() has completed\ninitialization:\n\n  Unable to handle kernel NULL pointer dereference at virtual address 0000000000000178\n  pc : _raw_spin_lock_irqsave+0x34/0x8c\n  lr : fastrpc_rpmsg_callback+0x3c/0xcc [fastrpc]\n  ...\n  Call trace:\n   _raw_spin_lock_irqsave+0x34/0x8c (P)\n   fastrpc_rpmsg_callback+0x3c/0xcc [fastrpc]\n   qcom_glink_native_rx+0x538/0x6a4\n   qcom_glink_smem_intr+0x14/0x24 [qcom_glink_smem]\n\nThe faulting address 0x178 corresponds to the lock variable inside\nstruct fastrpc_channel_ctx, confirming that cctx is NULL when\nfastrpc_rpmsg_callback() attempts to take the spinlock.\n\nThere are two issues here. First, dev_set_drvdata() is called before\nspin_lock_init() and idr_init(), leaving a window where the callback\ncan retrieve a valid cctx pointer but operate on an uninitialized\nspinlock. Second, the rpmsg channel becomes live as soon as the driver\nis bound, so fastrpc_rpmsg_callback() can fire before dev_set_drvdata()\nis called at all, resulting in dev_get_drvdata() returning NULL.\n\nFix both issues by moving all cctx initialization ahead of\ndev_set_drvdata() so the structure is fully initialized before it\nbecomes visible to the callback, and add a NULL check in\nfastrpc_rpmsg_callback() as a guard against any remaining window."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/misc/fastrpc.c"
                    ],
                    "versions": [
                        {
                            "version": "f6f9279f2bf0e37e2f1fb119d8832b8568536a04",
                            "lessThan": "a3d91218ccca1e990bfb737b5a6da23f0afba22b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f6f9279f2bf0e37e2f1fb119d8832b8568536a04",
                            "lessThan": "0d8c64511fd45690c5326f013710efcb4f73a97e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f6f9279f2bf0e37e2f1fb119d8832b8568536a04",
                            "lessThan": "150bf6f1193c69252580c19d3b3cd631ddce61d7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f6f9279f2bf0e37e2f1fb119d8832b8568536a04",
                            "lessThan": "8fb4a23df5b7c02929b62e5dbc270ec7c42b8134",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f6f9279f2bf0e37e2f1fb119d8832b8568536a04",
                            "lessThan": "4bfdf0a9855df55e9e031ca6a25b855820590c70",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f6f9279f2bf0e37e2f1fb119d8832b8568536a04",
                            "lessThan": "d5de9cb5355db36438edc621dde3673e3f235767",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f6f9279f2bf0e37e2f1fb119d8832b8568536a04",
                            "lessThan": "d77583ca33299fede0c194744ef2284e7ba5b763",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f6f9279f2bf0e37e2f1fb119d8832b8568536a04",
                            "lessThan": "5401fb4fe10fac6134c308495df18ed74aebb9c4",
                            "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/misc/fastrpc.c"
                    ],
                    "versions": [
                        {
                            "version": "5.1",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.1",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.260",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.211",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.177",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.143",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.94",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.36",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.13",
                            "lessThanOrEqual": "7.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1",
                            "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": "5.1",
                                    "versionEndExcluding": "5.10.260"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.1",
                                    "versionEndExcluding": "5.15.211"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.1",
                                    "versionEndExcluding": "6.1.177"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.1",
                                    "versionEndExcluding": "6.6.143"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.1",
                                    "versionEndExcluding": "6.12.94"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.1",
                                    "versionEndExcluding": "6.18.36"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.1",
                                    "versionEndExcluding": "7.0.13"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.1",
                                    "versionEndExcluding": "7.1"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/a3d91218ccca1e990bfb737b5a6da23f0afba22b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/0d8c64511fd45690c5326f013710efcb4f73a97e"
                },
                {
                    "url": "https://git.kernel.org/stable/c/150bf6f1193c69252580c19d3b3cd631ddce61d7"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8fb4a23df5b7c02929b62e5dbc270ec7c42b8134"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4bfdf0a9855df55e9e031ca6a25b855820590c70"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d5de9cb5355db36438edc621dde3673e3f235767"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d77583ca33299fede0c194744ef2284e7ba5b763"
                },
                {
                    "url": "https://git.kernel.org/stable/c/5401fb4fe10fac6134c308495df18ed74aebb9c4"
                }
            ],
            "title": "misc: fastrpc: Fix NULL pointer dereference in rpmsg callback",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}