{ "data_version": "4.0", "data_type": "CVE", "data_format": "MITRE", "CVE_data_meta": { "ID": "CVE-2024-26957", "ASSIGNER": "cve@kernel.org", "STATE": "PUBLIC" }, "description": { "description_data": [ { "lang": "eng", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/zcrypt: fix reference counting on zcrypt card objects\n\nTests with hot-plugging crytpo cards on KVM guests with debug\nkernel build revealed an use after free for the load field of\nthe struct zcrypt_card. The reason was an incorrect reference\nhandling of the zcrypt card object which could lead to a free\nof the zcrypt card object while it was still in use.\n\nThis is an example of the slab message:\n\n kernel: 0x00000000885a7512-0x00000000885a7513 @offset=1298. First byte 0x68 instead of 0x6b\n kernel: Allocated in zcrypt_card_alloc+0x36/0x70 [zcrypt] age=18046 cpu=3 pid=43\n kernel: kmalloc_trace+0x3f2/0x470\n kernel: zcrypt_card_alloc+0x36/0x70 [zcrypt]\n kernel: zcrypt_cex4_card_probe+0x26/0x380 [zcrypt_cex4]\n kernel: ap_device_probe+0x15c/0x290\n kernel: really_probe+0xd2/0x468\n kernel: driver_probe_device+0x40/0xf0\n kernel: __device_attach_driver+0xc0/0x140\n kernel: bus_for_each_drv+0x8c/0xd0\n kernel: __device_attach+0x114/0x198\n kernel: bus_probe_device+0xb4/0xc8\n kernel: device_add+0x4d2/0x6e0\n kernel: ap_scan_adapter+0x3d0/0x7c0\n kernel: ap_scan_bus+0x5a/0x3b0\n kernel: ap_scan_bus_wq_callback+0x40/0x60\n kernel: process_one_work+0x26e/0x620\n kernel: worker_thread+0x21c/0x440\n kernel: Freed in zcrypt_card_put+0x54/0x80 [zcrypt] age=9024 cpu=3 pid=43\n kernel: kfree+0x37e/0x418\n kernel: zcrypt_card_put+0x54/0x80 [zcrypt]\n kernel: ap_device_remove+0x4c/0xe0\n kernel: device_release_driver_internal+0x1c4/0x270\n kernel: bus_remove_device+0x100/0x188\n kernel: device_del+0x164/0x3c0\n kernel: device_unregister+0x30/0x90\n kernel: ap_scan_adapter+0xc8/0x7c0\n kernel: ap_scan_bus+0x5a/0x3b0\n kernel: ap_scan_bus_wq_callback+0x40/0x60\n kernel: process_one_work+0x26e/0x620\n kernel: worker_thread+0x21c/0x440\n kernel: kthread+0x150/0x168\n kernel: __ret_from_fork+0x3c/0x58\n kernel: ret_from_fork+0xa/0x30\n kernel: Slab 0x00000372022169c0 objects=20 used=18 fp=0x00000000885a7c88 flags=0x3ffff00000000a00(workingset|slab|node=0|zone=1|lastcpupid=0x1ffff)\n kernel: Object 0x00000000885a74b8 @offset=1208 fp=0x00000000885a7c88\n kernel: Redzone 00000000885a74b0: bb bb bb bb bb bb bb bb ........\n kernel: Object 00000000885a74b8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk\n kernel: Object 00000000885a74c8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk\n kernel: Object 00000000885a74d8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk\n kernel: Object 00000000885a74e8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk\n kernel: Object 00000000885a74f8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk\n kernel: Object 00000000885a7508: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 68 4b 6b 6b 6b a5 kkkkkkkkkkhKkkk.\n kernel: Redzone 00000000885a7518: bb bb bb bb bb bb bb bb ........\n kernel: Padding 00000000885a756c: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZZZZZ\n kernel: CPU: 0 PID: 387 Comm: systemd-udevd Not tainted 6.8.0-HF #2\n kernel: Hardware name: IBM 3931 A01 704 (KVM/Linux)\n kernel: Call Trace:\n kernel: [<00000000ca5ab5b8>] dump_stack_lvl+0x90/0x120\n kernel: [<00000000c99d78bc>] check_bytes_and_report+0x114/0x140\n kernel: [<00000000c99d53cc>] check_object+0x334/0x3f8\n kernel: [<00000000c99d820c>] alloc_debug_processing+0xc4/0x1f8\n kernel: [<00000000c99d852e>] get_partial_node.part.0+0x1ee/0x3e0\n kernel: [<00000000c99d94ec>] ___slab_alloc+0xaf4/0x13c8\n kernel: [<00000000c99d9e38>] __slab_alloc.constprop.0+0x78/0xb8\n kernel: [<00000000c99dc8dc>] __kmalloc+0x434/0x590\n kernel: [<00000000c9b4c0ce>] ext4_htree_store_dirent+0x4e/0x1c0\n kernel: [<00000000c9b908a2>] htree_dirblock_to_tree+0x17a/0x3f0\n kernel: \n---truncated---" } ] }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "n/a" } ] } ] }, "affects": { "vendor": { "vendor_data": [ { "vendor_name": "Linux", "product": { "product_data": [ { "product_name": "Linux", "version": { "version_data": [ { "version_affected": "<", "version_name": "1da177e4c3f4", "version_value": "7e500849fa55" }, { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "4.19.312", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.4.274", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.10.215", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.15.154", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.1.84", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.6.24", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.7.12", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.8.3", "lessThanOrEqual": "6.8.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.9", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ], "defaultStatus": "affected" } } ] } } ] } } ] } }, "references": { "reference_data": [ { "url": "https://git.kernel.org/stable/c/7e500849fa558879a1cde43f80c7c048c2437058", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/7e500849fa558879a1cde43f80c7c048c2437058" }, { "url": "https://git.kernel.org/stable/c/9daddee03de3f231012014dab8ab2b277a116a55", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/9daddee03de3f231012014dab8ab2b277a116a55" }, { "url": "https://git.kernel.org/stable/c/6470078ab3d8f222115e11c4ec67351f3031b3dd", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/6470078ab3d8f222115e11c4ec67351f3031b3dd" }, { "url": "https://git.kernel.org/stable/c/a55677878b93e9ebc31f66d0e2fb93be5e7836a6", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/a55677878b93e9ebc31f66d0e2fb93be5e7836a6" }, { "url": "https://git.kernel.org/stable/c/b7f6c3630eb3f103115ab0d7613588064f665d0d", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/b7f6c3630eb3f103115ab0d7613588064f665d0d" }, { "url": "https://git.kernel.org/stable/c/a64ab862e84e3e698cd351a87cdb504c7fc575ca", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/a64ab862e84e3e698cd351a87cdb504c7fc575ca" }, { "url": "https://git.kernel.org/stable/c/befb7f889594d23e1b475720cf93efd2f77df000", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/befb7f889594d23e1b475720cf93efd2f77df000" }, { "url": "https://git.kernel.org/stable/c/394b6d8bbdf9ddee6d5bcf3e1f3e9f23eecd6484", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/394b6d8bbdf9ddee6d5bcf3e1f3e9f23eecd6484" }, { "url": "https://git.kernel.org/stable/c/50ed48c80fecbe17218afed4f8bed005c802976c", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/50ed48c80fecbe17218afed4f8bed005c802976c" }, { "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html", "refsource": "MISC", "name": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html" } ] }, "generator": { "engine": "bippy-a5840b7849dd" } }