{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-68322",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-12-16T14:48:05.296Z",
        "datePublished": "2025-12-16T15:44:19.850Z",
        "dateUpdated": "2026-05-11T21:50:55.903Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T21:50:55.903Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nparisc: Avoid crash due to unaligned access in unwinder\n\nGuenter Roeck reported this kernel crash on his emulated B160L machine:\n\nStarting network: udhcpc: started, v1.36.1\n Backtrace:\n  [<104320d4>] unwind_once+0x1c/0x5c\n  [<10434a00>] walk_stackframe.isra.0+0x74/0xb8\n  [<10434a6c>] arch_stack_walk+0x28/0x38\n  [<104e5efc>] stack_trace_save+0x48/0x5c\n  [<105d1bdc>] set_track_prepare+0x44/0x6c\n  [<105d9c80>] ___slab_alloc+0xfc4/0x1024\n  [<105d9d38>] __slab_alloc.isra.0+0x58/0x90\n  [<105dc80c>] kmem_cache_alloc_noprof+0x2ac/0x4a0\n  [<105b8e54>] __anon_vma_prepare+0x60/0x280\n  [<105a823c>] __vmf_anon_prepare+0x68/0x94\n  [<105a8b34>] do_wp_page+0x8cc/0xf10\n  [<105aad88>] handle_mm_fault+0x6c0/0xf08\n  [<10425568>] do_page_fault+0x110/0x440\n  [<10427938>] handle_interruption+0x184/0x748\n  [<11178398>] schedule+0x4c/0x190\n  BUG: spinlock recursion on CPU#0, ifconfig/2420\n  lock: terminate_lock.2+0x0/0x1c, .magic: dead4ead, .owner: ifconfig/2420, .owner_cpu: 0\n\nWhile creating the stack trace, the unwinder uses the stack pointer to guess\nthe previous frame to read the previous stack pointer from memory.  The crash\nhappens, because the unwinder tries to read from unaligned memory and as such\ntriggers the unalignment trap handler which then leads to the spinlock\nrecursion and finally to a deadlock.\n\nFix it by checking the alignment before accessing the memory."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/parisc/kernel/unwind.c"
                    ],
                    "versions": [
                        {
                            "version": "c8921d72e390cb6fca3fb2b0c2badfda851647eb",
                            "lessThan": "9ac1f44723f26881b9fe7e69c7bc25397b879155",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c8921d72e390cb6fca3fb2b0c2badfda851647eb",
                            "lessThan": "009270208f76456c2cefcd565da263b90bb2eadb",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c8921d72e390cb6fca3fb2b0c2badfda851647eb",
                            "lessThan": "fd9f30d1038ee1624baa17a6ff11effe5f7617cb",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/parisc/kernel/unwind.c"
                    ],
                    "versions": [
                        {
                            "version": "4.19",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.19",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.58",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.17.8",
                            "lessThanOrEqual": "6.17.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18",
                            "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": "4.19",
                                    "versionEndExcluding": "6.12.58"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.19",
                                    "versionEndExcluding": "6.17.8"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.19",
                                    "versionEndExcluding": "6.18"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/9ac1f44723f26881b9fe7e69c7bc25397b879155"
                },
                {
                    "url": "https://git.kernel.org/stable/c/009270208f76456c2cefcd565da263b90bb2eadb"
                },
                {
                    "url": "https://git.kernel.org/stable/c/fd9f30d1038ee1624baa17a6ff11effe5f7617cb"
                }
            ],
            "title": "parisc: Avoid crash due to unaligned access in unwinder",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}