{
  "cveId": "CVE-2026-97942",
  "url": "https://patchblox.com/security/cve/CVE-2026-97942",
  "summary": "CVE-2026-97942 is fixed in 33 products on 1 platform, first by DEBIAN-CVE-2026-97942, released October 2, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  x86/alternatives: Exclude text poking against ch...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  x86/alternatives: Exclude text poking against change_page_attr()  From time to time, the following BUG can be observed in the x86 alternatives patching code [0]:    \u003E kernel BUG at arch/x86/kernel/alternative.c:2576!   \u003E Oops: invalid opcode: 0000 [#1] SMP NOPTI   \u003E CPU: 0 UID: 0 PID: 355 Comm: (udev-worker) Not tainted 7.1.3-1-default #1 PREEMPT(full) openSUSE Tumbleweed  8c1795b03ec64f997e57a8ad38b1161e3b98da64   \u003E Hardware name: QEMU Standard PC (i440FX \u002B PIIX, 1996), BIOS unknown 02/02/2022   \u003E RIP: 0010:__text_poke\u002B0x2aa/0x450   \u003E Call Trace:   \u003E  \u003CTASK\u003E   \u003E  smp_text_poke_batch_finish\u002B0x2a7/0x320   \u003E  __static_call_transform\u002B0xb7/0x220   \u003E  arch_static_call_transform\u002B0x5b/0xb0   \u003E  __static_call_init\u002B0xe9/0x270   \u003E  static_call_module_notify\u002B0x11f/0x150   \u003E  notifier_call_chain\u002B0x61/0xe0   \u003E  blocking_notifier_call_chain_robust\u002B0x63/0xc0   \u003E  load_module\u002B0x1c92/0x20c0   \u003E  init_module_from_file\u002B0xd8/0x140   \u003E  idempotent_init_module\u002B0x100/0x2f0   \u003E  __x64_sys_finit_module\u002B0x71/0xe0   \u003E  do_syscall_64\u002B0xe1/0x610   \u003E  entry_SYSCALL_64_after_hwframe\u002B0x76/0x7e  which matches the following BUG_ON() in alternative.c:  \t/* \t * If something went wrong, crash and burn since recovery paths are not \t * implemented. \t */ \tBUG_ON(!pages[0] || (cross_page_boundary \u0026\u0026 !pages[1]));  This can happen if vmalloc_to_page() fails, for any reason. Such can happen if text poking races with CPA, which can possibly result in the collapsing of page tables (or breaking of PMD hugepages). It is not a problem for most users of vmalloc_to_page() (they solely own the vmalloc\u0027d range) but, when CONFIG_ARCH_HAS_EXECMEM_ROX=y, various modules own a single execmem vmalloc range, and can call set_memory_*() in parallel on it. This can happen to race against __text_poke and cause havoc in vmalloc_to_page().  Fix it by excluding against CPA using the init_mm mmap read lock.  [ dhansen: Fix up SoB ordering. The actual code flow here was: \t   Pedro=\u003ELorenzo=\u003EMike=\u003EMe which is reflected in the SoB chain \t   now. I *believe* Mike simply picked up Lorenzo\u0027s update to \t   Pedro\u0027s post from the Link ]",
  "published": "2026-09-25T11:17:21Z",
  "severity": "important",
  "epss": 0.00203,
  "epssPercentile": 0.10353,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
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  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
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}