{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-97942",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:18:58.204Z",
        "datePublished": "2026-09-25T10:22:54.188Z",
        "dateUpdated": "2026-10-19T09:11:08.757Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T09:11:08.757Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/alternatives: Exclude text poking against change_page_attr()\n\nFrom time to time, the following BUG can be observed\nin the x86 alternatives patching code [0]:\n\n  > kernel BUG at arch/x86/kernel/alternative.c:2576!\n  > Oops: invalid opcode: 0000 [#1] SMP NOPTI\n  > CPU: 0 UID: 0 PID: 355 Comm: (udev-worker) Not tainted 7.1.3-1-default #1 PREEMPT(full) openSUSE Tumbleweed  8c1795b03ec64f997e57a8ad38b1161e3b98da64\n  > Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS unknown 02/02/2022\n  > RIP: 0010:__text_poke+0x2aa/0x450\n  > Call Trace:\n  >  <TASK>\n  >  smp_text_poke_batch_finish+0x2a7/0x320\n  >  __static_call_transform+0xb7/0x220\n  >  arch_static_call_transform+0x5b/0xb0\n  >  __static_call_init+0xe9/0x270\n  >  static_call_module_notify+0x11f/0x150\n  >  notifier_call_chain+0x61/0xe0\n  >  blocking_notifier_call_chain_robust+0x63/0xc0\n  >  load_module+0x1c92/0x20c0\n  >  init_module_from_file+0xd8/0x140\n  >  idempotent_init_module+0x100/0x2f0\n  >  __x64_sys_finit_module+0x71/0xe0\n  >  do_syscall_64+0xe1/0x610\n  >  entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nwhich matches the following BUG_ON() in alternative.c:\n\n\t/*\n\t * If something went wrong, crash and burn since recovery paths are not\n\t * implemented.\n\t */\n\tBUG_ON(!pages[0] || (cross_page_boundary && !pages[1]));\n\nThis can happen if vmalloc_to_page() fails, for any reason. Such can happen\nif text poking races with CPA, which can possibly result in the collapsing\nof page tables (or breaking of PMD hugepages). It is not a problem for most\nusers of vmalloc_to_page() (they solely own the vmalloc'd range) but, when\nCONFIG_ARCH_HAS_EXECMEM_ROX=y, various modules own a single execmem vmalloc\nrange, and can call set_memory_*() in parallel on it. This can happen to\nrace against __text_poke and cause havoc in vmalloc_to_page().\n\nFix it by excluding against CPA using the init_mm mmap read lock.\n\n[ dhansen: Fix up SoB ordering. The actual code flow here was:\n\t   Pedro=>Lorenzo=>Mike=>Me which is reflected in the SoB chain\n\t   now. I *believe* Mike simply picked up Lorenzo's update to\n\t   Pedro's post from the Link ]"
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/x86/kernel/alternative.c"
                    ],
                    "versions": [
                        {
                            "version": "64f6a4e10c05ed527f0f24b7954964255e0d3535",
                            "lessThan": "281e6f536f2f3f95d91938c5bd7ba9bcb4c1049d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "64f6a4e10c05ed527f0f24b7954964255e0d3535",
                            "lessThan": "89c60435b90d32ab5e3a39da3ae73d463d07debe",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "64f6a4e10c05ed527f0f24b7954964255e0d3535",
                            "lessThan": "1587d3394e254639cc36516256031334095e6ef3",
                            "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/x86/kernel/alternative.c"
                    ],
                    "versions": [
                        {
                            "version": "6.15",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.15",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.53",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.7",
                            "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": "6.15",
                                    "versionEndExcluding": "6.18.53"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.15",
                                    "versionEndExcluding": "7.2.7"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.15",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/281e6f536f2f3f95d91938c5bd7ba9bcb4c1049d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/89c60435b90d32ab5e3a39da3ae73d463d07debe"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1587d3394e254639cc36516256031334095e6ef3"
                }
            ],
            "title": "x86/alternatives: Exclude text poking against change_page_attr()",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}