{ "document":{ "aggregate_severity":{ "namespace":"https://nvd.nist.gov/vuln-metrics/cvss", "text":"HIGH" }, "category":"csaf_vex", "csaf_version":"2.0", "distribution":{ "tlp":{ "label":"WHITE", "url":"https:/www.first.org/tlp/" } }, "lang":"en", "notes":[ { "text":"In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: fix inline data read failure for ztailpacking pclusters\n\nCompressed folios for ztailpacking pclusters must be valid before adding\nthese pclusters to I/O chains. Otherwise, z_erofs_decompress_pcluster()\nmay assume they are already valid and then trigger a NULL pointer\ndereference.\n\nIt is somewhat hard to reproduce because the inline data is in the same\nblock as the tail of the compressed indexes, which are usually read just\nbefore. However, it may still happen if a fatal signal arrives while\nread_mapping_folio() is running, as shown below:\n\n erofs: (device dm-1): z_erofs_pcluster_begin: failed to get inline data -4\n Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008\n\n ...\n\n pc : z_erofs_decompress_queue+0x4c8/0xa14\n lr : z_erofs_decompress_queue+0x160/0xa14\n sp : ffffffc08b3eb3a0\n x29: ffffffc08b3eb570 x28: ffffffc08b3eb418 x27: 0000000000001000\n x26: ffffff8086ebdbb8 x25: ffffff8086ebdbb8 x24: 0000000000000001\n x23: 0000000000000008 x22: 00000000fffffffb x21: dead000000000700\n x20: 00000000000015e7 x19: ffffff808babb400 x18: ffffffc089edc098\n x17: 00000000c006287d x16: 00000000c006287d x15: 0000000000000004\n x14: ffffff80ba8f8000 x13: 0000000000000004 x12: 00000006589a77c9\n x11: 0000000000000015 x10: 0000000000000000 x9 : 0000000000000000\n x8 : 0000000000000000 x7 : 0000000000000000 x6 : 000000000000003f\n x5 : 0000000000000040 x4 : ffffffffffffffe0 x3 : 0000000000000020\n x2 : 0000000000000008 x1 : 0000000000000000 x0 : 0000000000000000\n Call trace:\n z_erofs_decompress_queue+0x4c8/0xa14\n z_erofs_runqueue+0x908/0x97c\n z_erofs_read_folio+0x128/0x228\n filemap_read_folio+0x68/0x128\n filemap_get_pages+0x44c/0x8b4\n filemap_read+0x12c/0x5b8\n generic_file_read_iter+0x4c/0x15c\n do_iter_readv_writev+0x188/0x1e0\n vfs_iter_read+0xac/0x1a4\n backing_file_read_iter+0x170/0x34c\n ovl_read_iter+0xf0/0x140\n vfs_read+0x28c/0x344\n ksys_read+0x80/0xf0\n __arm64_sys_read+0x24/0x34\n invoke_syscall+0x60/0x114\n el0_svc_common+0x88/0xe4\n do_el0_svc+0x24/0x30\n el0_svc+0x40/0xa8\n el0t_64_sync_handler+0x70/0xbc\n el0t_64_sync+0x1bc/0x1c0\n\nFix this by reading the inline data before allocating and adding\nthe pclusters to the I/O chains.", "category":"general", "title":"Synopsis" } ], "publisher":null, "references":[ { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45943" }, { "summary":"CVE-2026-45943 vex file", "category":"self", "url":"https://repo.openeuler.org/security/data/csaf/cve/2026/csaf-openeuler-cve-2026-45943.json" }, { "summary":"openEuler-SA-2026-2582", "category":"self", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2582" }, { "summary":"CVE-2026-45943", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-45943&packageName=kernel" } ], "title":"openEuler cve CVE-2026-45943", "tracking":{ "initial_release_date":"2026-06-08T15:17:18+08:00", "revision_history":[ { "date":"2026-06-08T15:17:18+08:00", "summary":"Initial", "number":"1.0.0" } ], "generator":{ "date":"2026-06-08T15:17:18+08:00", "engine":{ "name":"openEuler CSAF Tool V1.0" } }, "current_release_date":"2026-06-08T15:17:18+08:00", "id":"CVE-2026-45943", "version":"1.0.0", "status":"interim" } }, "product_tree":{ "branches":[ { "name":"openEuler", "category":"vendor", "branches":[ { "name":"openEuler", 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"category":"default_component_of" } ] }, "vulnerabilities":[ { "cve":"CVE-2026-45943", "notes":[ { "text":"In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: fix inline data read failure for ztailpacking pclusters\n\nCompressed folios for ztailpacking pclusters must be valid before adding\nthese pclusters to I/O chains. Otherwise, z_erofs_decompress_pcluster()\nmay assume they are already valid and then trigger a NULL pointer\ndereference.\n\nIt is somewhat hard to reproduce because the inline data is in the same\nblock as the tail of the compressed indexes, which are usually read just\nbefore. However, it may still happen if a fatal signal arrives while\nread_mapping_folio() is running, as shown below:\n\n erofs: (device dm-1): z_erofs_pcluster_begin: failed to get inline data -4\n Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008\n\n ...\n\n pc : z_erofs_decompress_queue+0x4c8/0xa14\n lr : z_erofs_decompress_queue+0x160/0xa14\n sp : ffffffc08b3eb3a0\n x29: ffffffc08b3eb570 x28: ffffffc08b3eb418 x27: 0000000000001000\n x26: ffffff8086ebdbb8 x25: ffffff8086ebdbb8 x24: 0000000000000001\n x23: 0000000000000008 x22: 00000000fffffffb x21: dead000000000700\n x20: 00000000000015e7 x19: ffffff808babb400 x18: ffffffc089edc098\n x17: 00000000c006287d x16: 00000000c006287d x15: 0000000000000004\n x14: ffffff80ba8f8000 x13: 0000000000000004 x12: 00000006589a77c9\n x11: 0000000000000015 x10: 0000000000000000 x9 : 0000000000000000\n x8 : 0000000000000000 x7 : 0000000000000000 x6 : 000000000000003f\n x5 : 0000000000000040 x4 : ffffffffffffffe0 x3 : 0000000000000020\n x2 : 0000000000000008 x1 : 0000000000000000 x0 : 0000000000000000\n Call trace:\n z_erofs_decompress_queue+0x4c8/0xa14\n z_erofs_runqueue+0x908/0x97c\n z_erofs_read_folio+0x128/0x228\n filemap_read_folio+0x68/0x128\n filemap_get_pages+0x44c/0x8b4\n filemap_read+0x12c/0x5b8\n generic_file_read_iter+0x4c/0x15c\n do_iter_readv_writev+0x188/0x1e0\n vfs_iter_read+0xac/0x1a4\n backing_file_read_iter+0x170/0x34c\n ovl_read_iter+0xf0/0x140\n vfs_read+0x28c/0x344\n ksys_read+0x80/0xf0\n __arm64_sys_read+0x24/0x34\n invoke_syscall+0x60/0x114\n el0_svc_common+0x88/0xe4\n do_el0_svc+0x24/0x30\n el0_svc+0x40/0xa8\n el0t_64_sync_handler+0x70/0xbc\n el0t_64_sync+0x1bc/0x1c0\n\nFix this by reading the inline data before allocating and adding\nthe pclusters to the I/O chains.", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":[ "openEuler-24.03-LTS-SP3:bpftool-6.6.0-145.3.14.145.oe2403sp3.aarch64", 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