In the Linux kernel, the following vulnerability has been resolved:
s390/mm: Fix in_atomic() handling in do_secure_storage_access()
Kernel user spaces accesses to not exported pages in atomic context incorrectly try to resolve the page fault. With debug options enabled call traces like this can be seen:
BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1523 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 419074, name: qemu-system-s39 preempt_count: 1, expected: 0 RCU nest depth: 0, expected: 0 INFO: lockdep is turned off. Preemption disabled at: [<00000383ea47cfa2>] copy_page_from_iter_atomic+0xa2/0x8a0 CPU: 12 UID: 0 PID: 419074 Comm: qemu-system-s39 Tainted: G W 6.16.0-20250531.rc0.git0.69b3a602feac.63.fc42.s390x+debug #1 PREEMPT Tainted: [W]=WARN Hardware name: IBM 3931 A01 703 (LPAR) Call Trace: [<00000383e990d282>] dump_stack_lvl+0xa2/0xe8 [<00000383e99bf152>] __might_resched+0x292/0x2d0 [<00000383eaa7c374>] down_read+0x34/0x2d0 [<00000383e99432f8>] do_secure_storage_access+0x108/0x360 [<00000383eaa724b0>] __do_pgm_check+0x130/0x220 [<00000383eaa842e4>] pgm_check_handler+0x114/0x160 [<00000383ea47d028>] copy_page_from_iter_atomic+0x128/0x8a0 ([<00000383ea47d016>] copy_page_from_iter_atomic+0x116/0x8a0) [<00000383e9c45eae>] generic_perform_write+0x16e/0x310 [<00000383e9eb87f4>] ext4_buffered_write_iter+0x84/0x160 [<00000383e9da0de4>] vfs_write+0x1c4/0x460 [<00000383e9da123c>] ksys_write+0x7c/0x100 [<00000383eaa7284e>] __do_syscall+0x15e/0x280 [<00000383eaa8417e>] system_call+0x6e/0x90 INFO: lockdep is turned off.
It is not allowed to take the mmap_lock while in atomic context. Therefore handle such a secure storage access fault as if the accessed page is not mapped: the uaccess function will return -EFAULT, and the caller has to deal with this. Usually this means that the access is retried in process context, which allows to resolve the page fault (or in this case export the page).
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 |
|---|---|---|---|---|
| Debian | — | No solution exists | Jul 28, 2025 | Jul 28, 2025 |
| Redhat_linux | — | No solution exists | Jul 31, 2025 | Jul 25, 2025 |
| Suse | — | Upgrade ocfs2-kmp-rtUpgrade kernel-default-livepatch-develUpgrade kernel-obs-qaUpgrade kernel-kvmsmall-develUpgrade kernel-obs-buildUpgrade dtb-amdUpgrade kernel-defaultUpgrade dtb-nvidiaUpgrade dtb-armUpgrade kselftests-kmp-rtUpgrade kernel-rt-optionalUpgrade kernel-docsUpgrade dtb-broadcomUpgrade kernel-64kb-optionalUpgrade kernel-kvmsmall-vdsoUpgrade kernel-docs-htmlUpgrade dtb-socionextUpgrade gfs2-kmp-rtUpgrade dlm-kmp-defaultUpgrade ocfs2-kmp-64kbUpgrade dtb-apmUpgrade dtb-appleUpgrade kernel-macrosUpgrade kernel-rt-livepatch-develUpgrade kselftests-kmp-defaultUpgrade cluster-md-kmp-defaultUpgrade kernel-rt-vdsoUpgrade gfs2-kmp-64kbUpgrade dtb-amlogicUpgrade kernel-zfcpdumpUpgrade kernel-default-extraUpgrade kernel-kvmsmallUpgrade dtb-marvellUpgrade ocfs2-kmp-defaultUpgrade dtb-alteraUpgrade cluster-md-kmp-rtUpgrade kernel-rtUpgrade kernel-64kbUpgrade dlm-kmp-64kbUpgrade kernel-symsUpgrade kernel-rt-livepatchUpgrade kernel-default-livepatchUpgrade dtb-freescaleUpgrade kernel-source-vanillaUpgrade kselftests-kmp-64kbUpgrade kernel-rt-extraUpgrade kernel-develUpgrade kernel-64kb-extraUpgrade dtb-mediatekUpgrade dtb-allwinnerUpgrade dtb-caviumUpgrade dlm-kmp-rtUpgrade dtb-xilinxUpgrade dtb-rockchipUpgrade dtb-renesasUpgrade kernel-default-vdsoUpgrade dtb-qcomUpgrade dtb-hisiliconUpgrade dtb-amazonUpgrade gfs2-kmp-defaultUpgrade cluster-md-kmp-64kbUpgrade dtb-sprdUpgrade kernel-sourceUpgrade kernel-64kb-develUpgrade dtb-lgUpgrade dtb-exynosUpgrade kernel-rt-develUpgrade kernel-default-optionalUpgrade kernel-default-devel | Dec 5, 2025 | Nov 6, 2025 |
| Ubuntu | — | Upgrade linux-image-oem-24.04bUpgrade linux-image-oem-24.04cUpgrade linux-image-6.14.0-1015-aws-64kUpgrade linux-image-aws-64k-6.14Upgrade linux-image-generic-64k-6.14Upgrade linux-image-6.14.0-1014-realtimeUpgrade linux-image-6.14.0-1007-azure-nvidiaUpgrade linux-image-realtimeUpgrade linux-image-aws-64kUpgrade linux-image-gcpUpgrade linux-image-6.14.0-1015-awsUpgrade linux-image-oem-24.04aUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-oem-24.04Upgrade linux-image-virtualUpgrade linux-image-oracle-64kUpgrade linux-image-generic-64kUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-oracleUpgrade linux-image-azure-nvidia-6.14Upgrade linux-image-6.14.0-1018-gcpUpgrade linux-image-genericUpgrade linux-image-oem-6.14Upgrade linux-image-virtual-6.14Upgrade linux-image-6.14.0-34-genericUpgrade linux-image-6.14.0-1015-oracle-64kUpgrade linux-image-oracle-64k-6.14Upgrade linux-image-6.14.0-1014-oemUpgrade linux-image-raspiUpgrade linux-image-6.14.0-1016-raspiUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-realtime-hwe-24.04Upgrade linux-image-raspi-6.14Upgrade linux-image-azureUpgrade linux-image-gcp-64k-6.14Upgrade linux-image-awsUpgrade linux-image-azure-nvidiaUpgrade linux-image-gcp-64kUpgrade linux-image-azure-6.14Upgrade linux-image-6.14.0-1018-gcp-64kUpgrade linux-image-oracle-6.14Upgrade linux-image-6.14.0-34-generic-64kUpgrade linux-image-gcp-6.14Upgrade linux-image-aws-6.14Upgrade linux-image-generic-6.14Upgrade linux-image-6.14.0-1015-oracleUpgrade linux-image-realtime-6.14Upgrade linux-image-6.14.0-1014-azure | Jul 31, 2025 | Jul 25, 2025 |
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