In the Linux kernel, the following vulnerability has been resolved:
mm/page_alloc: return NULL early from alloc_frozen_pages_nolock() in NMI on UP
On UP kernels (!CONFIG_SMP), spin_trylock() is a no-op that unconditionally succeeds even when the lock is already held. As a result, alloc_frozen_pages_nolock() called from NMI context can re-enter rmqueue() and acquire the zone lock that the interrupted context is already holding, corrupting the freelists.
With CONFIG_DEBUG_SPINLOCK on UP, the following BUG is triggered with the slub_kunit test module:
BUG: spinlock trylock failure on UP on CPU#0, kunit_try_catch/243 [...] Call Trace: <NMI> dump_stack_lvl+0x3f/0x60 do_raw_spin_trylock+0x41/0x50 _raw_spin_trylock+0x24/0x50 rmqueue.isra.0+0x2a9/0xa70 get_page_from_freelist+0xeb/0x450 alloc_frozen_pages_nolock_noprof+0x111/0x1e0 allocate_slab+0x42a/0x500 ___slab_alloc+0xa7/0x4c0 kmalloc_nolock_noprof+0x164/0x310 [...] </NMI>
Fix this by returning NULL early when invoked from NMI on a UP kernel.
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel6.18-debuginfo-common-x86_64Upgrade bpftool6.18-debuginfoUpgrade kernel-livepatch-6.18.30-61.116Upgrade kernel6.18-debuginfo-common-aarch64Upgrade bpftool6.18Upgrade kernel6.18-debuginfoUpgrade kernel6.18-develUpgrade perf6.18Upgrade kernel6.18Upgrade kernel6.18-headersUpgrade kernel6.18-tools-debuginfoUpgrade kernel6.18-toolsUpgrade kernel6.18-modules-extraUpgrade perf6.18-debuginfoUpgrade kernel6.18-modules-extra-commonUpgrade python3-perf6.18-debuginfoUpgrade python3-perf6.18Upgrade kernel6.18-tools-devel | Jun 23, 2026 | May 27, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | May 27, 2026 |
| Ubuntu | — | Upgrade linux-image-oem-24.04aUpgrade linux-image-oracle-7.0Upgrade linux-image-realtimeUpgrade linux-image-realtime-64k-hwe-26.04Upgrade linux-image-7.0.0-27-genericUpgrade linux-image-7.0.0-1008-oemUpgrade linux-image-virtual-hwe-26.04Upgrade linux-image-7.0.0-1007-oracle-64kUpgrade linux-image-awsUpgrade linux-image-7.0.0-1014-raspiUpgrade linux-image-azure-7.0Upgrade linux-image-nvidia-64k-7.0Upgrade linux-image-generic-64k-7.0Upgrade linux-image-ibmUpgrade linux-image-raspi-7.0Upgrade linux-image-oracle-64k-7.0Upgrade linux-image-generic-7.0Upgrade linux-image-nvidia-64kUpgrade linux-image-generic-hwe-26.04Upgrade linux-image-oracleUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-7.0.0-1007-oracleUpgrade linux-image-gcpUpgrade linux-image-7.0.0-1009-azure-fdeUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-oem-24.04dUpgrade linux-image-virtual-7.0Upgrade linux-image-realtime-hwe-26.04Upgrade linux-image-oem-26.04Upgrade linux-image-virtualUpgrade linux-image-azure-fdeUpgrade linux-image-realtime-64kUpgrade linux-image-nvidia-7.0Upgrade linux-image-7.0.0-1013-nvidiaUpgrade linux-image-oem-24.04cUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-oem-7.0Upgrade linux-image-oracle-64kUpgrade linux-image-raspi-realtimeUpgrade linux-image-gcp-7.0Upgrade linux-image-aws-7.0Upgrade linux-image-realtime-64k-7.0Upgrade linux-image-7.0.0-27-generic-64kUpgrade linux-image-7.0.0-1009-ibmUpgrade linux-image-7.0.0-27-realtime-64kUpgrade linux-image-7.0.0-1014-raspi-realtimeUpgrade linux-image-raspiUpgrade linux-image-nvidiaUpgrade linux-image-7.0.0-27-realtimeUpgrade linux-image-7.0.0-28-generic-64kUpgrade linux-image-oem-24.04bUpgrade linux-image-7.0.0-1008-aws-64kUpgrade linux-image-gcp-64k-7.0Upgrade linux-image-gcp-64kUpgrade linux-image-ibm-7.0Upgrade linux-image-generic-64kUpgrade linux-image-realtime-7.0Upgrade linux-image-raspi-realtime-7.0Upgrade linux-image-aws-64k-7.0Upgrade linux-image-7.0.0-1008-awsUpgrade linux-image-oem-24.04Upgrade linux-image-generic-64k-hwe-26.04Upgrade linux-image-azureUpgrade linux-image-7.0.0-1007-gcp-64kUpgrade linux-image-azure-fde-7.0Upgrade linux-image-oem-26.04aUpgrade linux-image-7.0.0-1013-nvidia-64kUpgrade linux-image-genericUpgrade linux-image-aws-64kUpgrade linux-image-7.0.0-28-genericUpgrade linux-image-7.0.0-1010-azureUpgrade linux-image-7.0.0-1007-gcp | Jul 1, 2026 | May 27, 2026 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub