{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2025-38194", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-38194", "idYear": 2025, "status": "PUBLISHED", "publishedAt": "2025-07-04T13:37:17.922Z", "updatedAt": "2026-05-11T21:23:04.119Z", "importedAt": "2026-10-24T01:57:34.152Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "jffs2: check that raw node were preallocated before writing summary", "summary": "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.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "2f785402f39b96a077b6e62bf26164bfb8e0c980", "status": "affected", "versionType": "git", "lessThan": "337f80f3d546e131c7aa90b61d8cde051ae858c7" }, { "version": "2f785402f39b96a077b6e62bf26164bfb8e0c980", "status": "affected", "versionType": "git", "lessThan": "8ce46dc5b10b0b6f67663202a4921b0e11ad7367" }, { "version": "2f785402f39b96a077b6e62bf26164bfb8e0c980", "status": "affected", "versionType": "git", "lessThan": "4adee34098a6ee86a54bf3ec885eab620c126a6b" }, { "version": "2f785402f39b96a077b6e62bf26164bfb8e0c980", "status": "affected", "versionType": "git", "lessThan": "c0edcdb4fc106d69a2d1a0ce4868193511c389f3" }, { "version": "2f785402f39b96a077b6e62bf26164bfb8e0c980", "status": "affected", "versionType": "git", "lessThan": "3f46644a5131a4793fc95c32a7d0a769745b06e7" }, { "version": "2f785402f39b96a077b6e62bf26164bfb8e0c980", "status": "affected", "versionType": "git", "lessThan": "da12ef7e19048dc5714032c2db587a215852b200" }, { "version": "2f785402f39b96a077b6e62bf26164bfb8e0c980", "status": "affected", "versionType": "git", "lessThan": "346cfb9d19ea7feb6fb57917b21c4797fb444dab" }, { "version": "2f785402f39b96a077b6e62bf26164bfb8e0c980", "status": "affected", "versionType": "git", "lessThan": "ec9e6f22bce433b260ea226de127ec68042849b0" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "2.6.18", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "2.6.18" }, { "version": "5.4.295", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.239", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.186", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.142", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.95", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.35", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.15.4", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.15.*" }, { "version": "6.16", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }