{ "document":{ "aggregate_severity":{ "namespace":"https://nvd.nist.gov/vuln-metrics/cvss", "text":"MEDIUM" }, "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\njffs2: check that raw node were preallocated before writing summary\n\nSyzkaller detected a kernel bug in jffs2_link_node_ref, caused by fault\ninjection in jffs2_prealloc_raw_node_refs. jffs2_sum_write_sumnode doesn't\ncheck return value of jffs2_prealloc_raw_node_refs and simply lets any\nerror propagate into jffs2_sum_write_data, which eventually calls\njffs2_link_node_ref in order to link the summary to an expectedly allocated\nnode.\n\nkernel BUG at fs/jffs2/nodelist.c:592!\ninvalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI\nCPU: 1 PID: 31277 Comm: syz-executor.7 Not tainted 6.1.128-syzkaller-00139-ge10f83ca10a1 #0\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014\nRIP: 0010:jffs2_link_node_ref+0x570/0x690 fs/jffs2/nodelist.c:592\nCall Trace:\n \n jffs2_sum_write_data fs/jffs2/summary.c:841 [inline]\n jffs2_sum_write_sumnode+0xd1a/0x1da0 fs/jffs2/summary.c:874\n jffs2_do_reserve_space+0xa18/0xd60 fs/jffs2/nodemgmt.c:388\n jffs2_reserve_space+0x55f/0xaa0 fs/jffs2/nodemgmt.c:197\n jffs2_write_inode_range+0x246/0xb50 fs/jffs2/write.c:362\n jffs2_write_end+0x726/0x15d0 fs/jffs2/file.c:301\n generic_perform_write+0x314/0x5d0 mm/filemap.c:3856\n __generic_file_write_iter+0x2ae/0x4d0 mm/filemap.c:3973\n generic_file_write_iter+0xe3/0x350 mm/filemap.c:4005\n call_write_iter include/linux/fs.h:2265 [inline]\n do_iter_readv_writev+0x20f/0x3c0 fs/read_write.c:735\n do_iter_write+0x186/0x710 fs/read_write.c:861\n vfs_iter_write+0x70/0xa0 fs/read_write.c:902\n iter_file_splice_write+0x73b/0xc90 fs/splice.c:685\n do_splice_from fs/splice.c:763 [inline]\n direct_splice_actor+0x10c/0x170 fs/splice.c:950\n splice_direct_to_actor+0x337/0xa10 fs/splice.c:896\n do_splice_direct+0x1a9/0x280 fs/splice.c:1002\n do_sendfile+0xb13/0x12c0 fs/read_write.c:1255\n __do_sys_sendfile64 fs/read_write.c:1323 [inline]\n __se_sys_sendfile64 fs/read_write.c:1309 [inline]\n __x64_sys_sendfile64+0x1cf/0x210 fs/read_write.c:1309\n do_syscall_x64 arch/x86/entry/common.c:51 [inline]\n do_syscall_64+0x35/0x80 arch/x86/entry/common.c:81\n entry_SYSCALL_64_after_hwframe+0x6e/0xd8\n\nFix this issue by checking return value of jffs2_prealloc_raw_node_refs\nbefore calling jffs2_sum_write_data.\n\nFound by Linux Verification Center (linuxtesting.org) with Syzkaller.", "category":"general", "title":"Synopsis" } ], "publisher":null, "references":[ { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2025-38194" }, { "summary":"CVE-2025-38194 vex file", "category":"self", "url":"https://repo.openeuler.org/security/data/csaf/cve/2025/csaf-openeuler-cve-2025-38194.json" }, { "summary":"openEuler-SA-2026-2418", "category":"self", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2418" }, { "summary":"CVE-2025-38194", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2025-38194&packageName=kernel" } ], "title":"openEuler cve CVE-2025-38194", "tracking":{ "initial_release_date":"2026-05-25T10:43:01+08:00", "revision_history":[ { "date":"2026-05-25T10:43:01+08:00", "summary":"Initial", "number":"1.0.0" } ], "generator":{ "date":"2026-05-25T10:43:01+08:00", "engine":{ "name":"openEuler CSAF Tool V1.0" } }, "current_release_date":"2026-05-25T10:43:01+08:00", "id":"CVE-2025-38194", "version":"1.0.0", "status":"interim" } }, "product_tree":{ "branches":[ { "name":"openEuler", "category":"vendor", "branches":[ { "name":"openEuler", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:24.03-LTS-SP1" }, "product_id":"openEuler-24.03-LTS-SP1", 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fs/jffs2/nodelist.c:592!\ninvalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI\nCPU: 1 PID: 31277 Comm: syz-executor.7 Not tainted 6.1.128-syzkaller-00139-ge10f83ca10a1 #0\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014\nRIP: 0010:jffs2_link_node_ref+0x570/0x690 fs/jffs2/nodelist.c:592\nCall Trace:\n \n jffs2_sum_write_data fs/jffs2/summary.c:841 [inline]\n jffs2_sum_write_sumnode+0xd1a/0x1da0 fs/jffs2/summary.c:874\n jffs2_do_reserve_space+0xa18/0xd60 fs/jffs2/nodemgmt.c:388\n jffs2_reserve_space+0x55f/0xaa0 fs/jffs2/nodemgmt.c:197\n jffs2_write_inode_range+0x246/0xb50 fs/jffs2/write.c:362\n jffs2_write_end+0x726/0x15d0 fs/jffs2/file.c:301\n generic_perform_write+0x314/0x5d0 mm/filemap.c:3856\n __generic_file_write_iter+0x2ae/0x4d0 mm/filemap.c:3973\n generic_file_write_iter+0xe3/0x350 mm/filemap.c:4005\n call_write_iter include/linux/fs.h:2265 [inline]\n do_iter_readv_writev+0x20f/0x3c0 fs/read_write.c:735\n do_iter_write+0x186/0x710 fs/read_write.c:861\n vfs_iter_write+0x70/0xa0 fs/read_write.c:902\n iter_file_splice_write+0x73b/0xc90 fs/splice.c:685\n do_splice_from fs/splice.c:763 [inline]\n direct_splice_actor+0x10c/0x170 fs/splice.c:950\n splice_direct_to_actor+0x337/0xa10 fs/splice.c:896\n do_splice_direct+0x1a9/0x280 fs/splice.c:1002\n do_sendfile+0xb13/0x12c0 fs/read_write.c:1255\n __do_sys_sendfile64 fs/read_write.c:1323 [inline]\n __se_sys_sendfile64 fs/read_write.c:1309 [inline]\n __x64_sys_sendfile64+0x1cf/0x210 fs/read_write.c:1309\n do_syscall_x64 arch/x86/entry/common.c:51 [inline]\n do_syscall_64+0x35/0x80 arch/x86/entry/common.c:81\n entry_SYSCALL_64_after_hwframe+0x6e/0xd8\n\nFix this issue by checking return value of jffs2_prealloc_raw_node_refs\nbefore calling jffs2_sum_write_data.\n\nFound by Linux Verification Center (linuxtesting.org) with Syzkaller.", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":{ "$ref":"$.vulnerabilities[0].product_status.fixed" } }, "remediations":[ { "product_ids":{ "$ref":"$.vulnerabilities[0].product_status.fixed" }, "details":"kernel security update", "category":"vendor_fix", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2418" } ], "scores":[ { "cvss_v3":{ "baseSeverity":"MEDIUM", "baseScore":5.5, "vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version":"3.1" }, "products":{ "$ref":"$.vulnerabilities[0].product_status.fixed" } } ], "threats":[ { "details":"Medium", "category":"impact" } ], "title":"CVE-2025-38194" } ] }