CVE-2026-97942Medium· 5.5▾ SunlitIn 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]: > k…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · likelihood 0 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Exploit-prediction probability, daily snapshots since Sep 27.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.2%
— → 5.5
none → medium
0.2% → 0.2%
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]:
kernel BUG at arch/x86/kernel/alternative.c:2576! Oops: invalid opcode: 0000 [#1] SMP NOPTI CPU: 0 UID: 0 PID: 355 Comm: (udev-worker) Not tainted 7.1.3-1-default #1 PREEMPT(full) openSUSE Tumbleweed 8c1795b03ec64f997e57a8ad38b1161e3b98da64 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS unknown 02/02/2022 RIP: 0010:__text_poke+0x2aa/0x450 Call Trace: <TASK> smp_text_poke_batch_finish+0x2a7/0x320 __static_call_transform+0xb7/0x220 arch_static_call_transform+0x5b/0xb0 __static_call_init+0xe9/0x270 static_call_module_notify+0x11f/0x150 notifier_call_chain+0x61/0xe0 blocking_notifier_call_chain_robust+0x63/0xc0 load_module+0x1c92/0x20c0 init_module_from_file+0xd8/0x140 idempotent_init_module+0x100/0x2f0 __x64_sys_finit_module+0x71/0xe0 do_syscall_64+0xe1/0x610 entry_SYSCALL_64_after_hwframe+0x76/0x7e
which matches the following BUG_ON() in alternative.c:
/*
* If something went wrong, crash and burn since recovery paths are not
* implemented.
*/
BUG_ON(!pages[0] || (cross_page_boundary && !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'd 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: Pedro=>Lorenzo=>Mike=>Me which is reflected in the SoB chain now. I believe Mike simply picked up Lorenzo's update to Pedro's post from the Link ]
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
CVE-2024-57804High· 7.3scsi: mpi3mr: Fix corrupt config pages PHY state is switched in sysfs
CVE-2024-47794High· 7.8bpf: Prevent tailcall infinite loop caused by freplace
CVE-2022-41850Medium· 4.7roccat_report_event in drivers/hid/hid-roccat.c in the Linux kernel through 5.19.12 has a race condition and resultant use-after-free in certain situations where a report is received while copying a report->value is in progress.
CVE-2026-100070Medium· 5.5In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_nat_sip: rewind offset when NAT shrinks the packet sashiko says: If map_addr() changes the packet length, such as when the public NAT IP string is shor…
CVE-2026-100071Medium· 5.5In the Linux kernel, the following vulnerability has been resolved: net: hsr: free learned nodes on device setup failure hsr_dev_finalize() can fail after a lower-device RX handler has already been registered (slave A is added before t…
CVE-2025-39977High· 7.8In the Linux kernel, the following vulnerability has been resolved: futex: Prevent use-after-free during requeue-PI syzbot managed to trigger the following race: T1 T2 futex_wait_requeue_pi() fute…