{"id":"CVE-2023-53108","summary":"net/iucv: Fix size of interrupt data","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/iucv: Fix size of interrupt data\n\niucv_irq_data needs to be 4 bytes larger.\nThese bytes are not used by the iucv module, but written by\nthe z/VM hypervisor in case a CPU is deconfigured.\n\nReported as:\nBUG dma-kmalloc-64 (Not tainted): kmalloc Redzone overwritten\n-----------------------------------------------------------------------------\n0x0000000000400564-0x0000000000400567 @offset=1380. First byte 0x80 instead of 0xcc\nAllocated in iucv_cpu_prepare+0x44/0xd0 age=167839 cpu=2 pid=1\n__kmem_cache_alloc_node+0x166/0x450\nkmalloc_node_trace+0x3a/0x70\niucv_cpu_prepare+0x44/0xd0\ncpuhp_invoke_callback+0x156/0x2f0\ncpuhp_issue_call+0xf0/0x298\n__cpuhp_setup_state_cpuslocked+0x136/0x338\n__cpuhp_setup_state+0xf4/0x288\niucv_init+0xf4/0x280\ndo_one_initcall+0x78/0x390\ndo_initcalls+0x11a/0x140\nkernel_init_freeable+0x25e/0x2a0\nkernel_init+0x2e/0x170\n__ret_from_fork+0x3c/0x58\nret_from_fork+0xa/0x40\nFreed in iucv_init+0x92/0x280 age=167839 cpu=2 pid=1\n__kmem_cache_free+0x308/0x358\niucv_init+0x92/0x280\ndo_one_initcall+0x78/0x390\ndo_initcalls+0x11a/0x140\nkernel_init_freeable+0x25e/0x2a0\nkernel_init+0x2e/0x170\n__ret_from_fork+0x3c/0x58\nret_from_fork+0xa/0x40\nSlab 0x0000037200010000 objects=32 used=30 fp=0x0000000000400640 flags=0x1ffff00000010200(slab|head|node=0|zone=0|\nObject 0x0000000000400540 @offset=1344 fp=0x0000000000000000\nRedzone  0000000000400500: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................\nRedzone  0000000000400510: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................\nRedzone  0000000000400520: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................\nRedzone  0000000000400530: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................\nObject   0000000000400540: 00 01 00 03 00 00 00 00 00 00 00 00 00 00 00 00  ................\nObject   0000000000400550: f3 86 81 f2 f4 82 f8 82 f0 f0 f0 f0 f0 f0 f0 f2  ................\nObject   0000000000400560: 00 00 00 00 80 00 00 00 cc cc cc cc cc cc cc cc  ................\nObject   0000000000400570: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................\nRedzone  0000000000400580: cc cc cc cc cc cc cc cc                          ........\nPadding  00000000004005d4: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ\nPadding  00000000004005e4: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ\nPadding  00000000004005f4: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a              ZZZZZZZZZZZZ\nCPU: 6 PID: 121030 Comm: 116-pai-crypto. Not tainted 6.3.0-20230221.rc0.git4.99b8246b2d71.300.fc37.s390x+debug #1\nHardware name: IBM 3931 A01 704 (z/VM 7.3.0)\nCall Trace:\n[\u003c000000032aa034ec\u003e] dump_stack_lvl+0xac/0x100\n[\u003c0000000329f5a6cc\u003e] check_bytes_and_report+0x104/0x140\n[\u003c0000000329f5aa78\u003e] check_object+0x370/0x3c0\n[\u003c0000000329f5ede6\u003e] free_debug_processing+0x15e/0x348\n[\u003c0000000329f5f06a\u003e] free_to_partial_list+0x9a/0x2f0\n[\u003c0000000329f5f4a4\u003e] __slab_free+0x1e4/0x3a8\n[\u003c0000000329f61768\u003e] __kmem_cache_free+0x308/0x358\n[\u003c000000032a91465c\u003e] iucv_cpu_dead+0x6c/0x88\n[\u003c0000000329c2fc66\u003e] cpuhp_invoke_callback+0x156/0x2f0\n[\u003c000000032aa062da\u003e] _cpu_down.constprop.0+0x22a/0x5e0\n[\u003c0000000329c3243e\u003e] cpu_device_down+0x4e/0x78\n[\u003c000000032a61dee0\u003e] device_offline+0xc8/0x118\n[\u003c000000032a61e048\u003e] online_store+0x60/0xe0\n[\u003c000000032a08b6b0\u003e] kernfs_fop_write_iter+0x150/0x1e8\n[\u003c0000000329fab65c\u003e] vfs_write+0x174/0x360\n[\u003c0000000329fab9fc\u003e] ksys_write+0x74/0x100\n[\u003c000000032aa03a5a\u003e] __do_syscall+0x1da/0x208\n[\u003c000000032aa177b2\u003e] system_call+0x82/0xb0\nINFO: lockdep is turned off.\nFIX dma-kmalloc-64: Restoring kmalloc Redzone 0x0000000000400564-0x0000000000400567=0xcc\nFIX dma-kmalloc-64: Object at 0x0000000000400540 not freed","modified":"2026-04-03T13:14:37.648904Z","published":"2025-05-02T15:55:48.867Z","related":["SUSE-SU-2025:01918-1","SUSE-SU-2025:01966-1","SUSE-SU-2025:01983-1","SUSE-SU-2025:02173-1","SUSE-SU-2025:02262-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53108.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3cfdefdaaa4b2a77e84d0db5e0a47a7aa3bb615a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3d87debb8ed2649608ff432699e7c961c0c6f03b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/71da5991b6438ad6da13ceb25465ee2760a1c52f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/93a970494881004c348d8feb38463ee72496e99a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a908eae0f71811afee86be7088692f1aa5855c3b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b0d2bb5e31a693ebc8888eb407f8a257a3680efa"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bd2e78462ae18484e55ae4d285df2c86b86bdd12"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c78f1345db4e4b3b78f9b768f4074ebd60abe966"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53108.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-53108"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"2356f4cb191100a5e92d537f13e5efdbc697e9cb"},{"fixed":"a908eae0f71811afee86be7088692f1aa5855c3b"},{"fixed":"b0d2bb5e31a693ebc8888eb407f8a257a3680efa"},{"fixed":"71da5991b6438ad6da13ceb25465ee2760a1c52f"},{"fixed":"bd2e78462ae18484e55ae4d285df2c86b86bdd12"},{"fixed":"3cfdefdaaa4b2a77e84d0db5e0a47a7aa3bb615a"},{"fixed":"c78f1345db4e4b3b78f9b768f4074ebd60abe966"},{"fixed":"93a970494881004c348d8feb38463ee72496e99a"},{"fixed":"3d87debb8ed2649608ff432699e7c961c0c6f03b"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-53108.json"}}],"schema_version":"1.7.5"}