{"id":"CVE-2025-38359","title":"s390/mm: Fix in_atomic() handling in do_secure_storage_access()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/mm: Fix in_atomic() handling in do_secure_storage_access()\n\nKernel user spaces accesses to not exported pages in atomic context\nincorrectly try to resolve the page…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 084ea4d611a3d00ee3930400b262240e10895900 < 9bcfbd58fc5a02777fed3e582f22503ef3289a43","Linux >= 084ea4d611a3d00ee3930400b262240e10895900 < 7aee3e5163cade3f4cf1cc0710dfbadb47f1ba84","Linux >= 084ea4d611a3d00ee3930400b262240e10895900 < d2e317dfd2d1fe416c77315d17c5d57dbe374915","Linux >= 084ea4d611a3d00ee3930400b262240e10895900 < 11709abccf93b08adde95ef313c300b0d4bc28f1","Linux 5.7"],"published":"2025-07-25","updated":"2026-10-21","sourceUpdated":"2026-10-21T12:37:01.290Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-38359","references":[{"url":"https://git.kernel.org/stable/c/9bcfbd58fc5a02777fed3e582f22503ef3289a43"},{"url":"https://git.kernel.org/stable/c/7aee3e5163cade3f4cf1cc0710dfbadb47f1ba84"},{"url":"https://git.kernel.org/stable/c/d2e317dfd2d1fe416c77315d17c5d57dbe374915"},{"url":"https://git.kernel.org/stable/c/11709abccf93b08adde95ef313c300b0d4bc28f1"}],"tags":["cve.org"],"epss":0.0017,"epssPercentile":0.06294,"ingestedAt":"2026-10-21T12:48:53.703Z","slug":"CVE-2025-38359","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ns390/mm: Fix in_atomic() handling in do_secure_storage_access()\n\nKernel user spaces accesses to not exported pages in atomic context\nincorrectly try to resolve the page fault.\nWith debug options enabled call traces like this can be seen:\n\nBUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1523\nin_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 419074, name: qemu-system-s39\npreempt_count: 1, expected: 0\nRCU nest depth: 0, expected: 0\nINFO: lockdep is turned off.\nPreemption disabled at:\n[<00000383ea47cfa2>] copy_page_from_iter_atomic+0xa2/0x8a0\nCPU: 12 UID: 0 PID: 419074 Comm: qemu-system-s39\nTainted: G        W           6.16.0-20250531.rc0.git0.69b3a602feac.63.fc42.s390x+debug #1 PREEMPT\nTainted: [W]=WARN\nHardware name: IBM 3931 A01 703 (LPAR)\nCall Trace:\n [<00000383e990d282>] dump_stack_lvl+0xa2/0xe8\n [<00000383e99bf152>] __might_resched+0x292/0x2d0\n [<00000383eaa7c374>] down_read+0x34/0x2d0\n [<00000383e99432f8>] do_secure_storage_access+0x108/0x360\n [<00000383eaa724b0>] __do_pgm_check+0x130/0x220\n [<00000383eaa842e4>] pgm_check_handler+0x114/0x160\n [<00000383ea47d028>] copy_page_from_iter_atomic+0x128/0x8a0\n([<00000383ea47d016>] copy_page_from_iter_atomic+0x116/0x8a0)\n [<00000383e9c45eae>] generic_perform_write+0x16e/0x310\n [<00000383e9eb87f4>] ext4_buffered_write_iter+0x84/0x160\n [<00000383e9da0de4>] vfs_write+0x1c4/0x460\n [<00000383e9da123c>] ksys_write+0x7c/0x100\n [<00000383eaa7284e>] __do_syscall+0x15e/0x280\n [<00000383eaa8417e>] system_call+0x6e/0x90\nINFO: lockdep is turned off.\n\nIt is not allowed to take the mmap_lock while in atomic context. Therefore\nhandle such a secure storage access fault as if the accessed page is not\nmapped: the uaccess function will return -EFAULT, and the caller has to\ndeal with this. Usually this means that the access is retried in process\ncontext, which allows to resolve the page fault (or in this case export the\npage).\n\n## Affected\n\n- `Linux >= 084ea4d611a3d00ee3930400b262240e10895900 < 9bcfbd58fc5a02777fed3e582f22503ef3289a43`\n- `Linux >= 084ea4d611a3d00ee3930400b262240e10895900 < 7aee3e5163cade3f4cf1cc0710dfbadb47f1ba84`\n- `Linux >= 084ea4d611a3d00ee3930400b262240e10895900 < d2e317dfd2d1fe416c77315d17c5d57dbe374915`\n- `Linux >= 084ea4d611a3d00ee3930400b262240e10895900 < 11709abccf93b08adde95ef313c300b0d4bc28f1`\n- `Linux 5.7`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}