526 lines
27 KiB
JSON
526 lines
27 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2025-68261",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2025-12-16T13:41:40.267Z",
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"datePublished": "2025-12-16T14:45:03.252Z",
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"dateUpdated": "2026-11-10T12:37:58.189Z"
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},
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"cna": {
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T12:10:33.475Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: add i_data_sem protection in ext4_destroy_inline_data_nolock()\n\nFix a race between inline data destruction and block mapping.\n\nThe function ext4_destroy_inline_data_nolock() changes the inode data\nlayout by clearing EXT4_INODE_INLINE_DATA and setting EXT4_INODE_EXTENTS.\nAt the same time, another thread may execute ext4_map_blocks(), which\ntests EXT4_INODE_EXTENTS to decide whether to call ext4_ext_map_blocks()\nor ext4_ind_map_blocks().\n\nWithout i_data_sem protection, ext4_ind_map_blocks() may receive inode\nwith EXT4_INODE_EXTENTS flag and triggering assert.\n\nkernel BUG at fs/ext4/indirect.c:546!\nEXT4-fs (loop2): unmounting filesystem.\ninvalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014\nRIP: 0010:ext4_ind_map_blocks.cold+0x2b/0x5a fs/ext4/indirect.c:546\n\nCall Trace:\n <TASK>\n ext4_map_blocks+0xb9b/0x16f0 fs/ext4/inode.c:681\n _ext4_get_block+0x242/0x590 fs/ext4/inode.c:822\n ext4_block_write_begin+0x48b/0x12c0 fs/ext4/inode.c:1124\n ext4_write_begin+0x598/0xef0 fs/ext4/inode.c:1255\n ext4_da_write_begin+0x21e/0x9c0 fs/ext4/inode.c:3000\n generic_perform_write+0x259/0x5d0 mm/filemap.c:3846\n ext4_buffered_write_iter+0x15b/0x470 fs/ext4/file.c:285\n ext4_file_write_iter+0x8e0/0x17f0 fs/ext4/file.c:679\n call_write_iter include/linux/fs.h:2271 [inline]\n do_iter_readv_writev+0x212/0x3c0 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+0x10f/0x170 fs/splice.c:950\n splice_direct_to_actor+0x33a/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"
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}
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],
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{
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"baseScore": 7.5,
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},
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{
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"lang": "en",
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"value": "AV:N - A remote client can reach the race through a ksmbd WRITE plus FLUSH/write-through request or an NFS WRITE plus COMMIT when an inline-data ext4 filesystem backs the exported share.\nAC:L - The attacker controls both sides by issuing concurrent writes and flushes or commits and can retry until the race succeeds; the inline-data filesystem feature is a deployment precondition rather than an uncontrollable race condition.\nPR:N - A guest-writable SMB share or anonymous writable NFS export permits the required file creation and write operations without authentication or prior privileges.\nUI:N - The attacker performs all required file operations directly, with no victim action needed after the filesystem and network share are available.\nS:U - The failure affects the host kernel and filesystem within their existing security authority and does not cross a virtualization, sandbox, or IOMMU boundary.\nC:N - The demonstrated failure is an assertion-triggered BUG with no information returned to the attacker, out-of-bounds read, use-after-free, or established disclosure primitive.\nI:N - The unconditional assertion occurs at the entry to ext4_ind_map_blocks() before that mapper modifies block mappings, and no arbitrary-write or memory-corruption primitive is established.\nA:H - The failed assertion executes BUG(), causing a kernel oops and potentially a full panic when panic-on-oops is enabled, allowing repeated denial of service."
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}
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"status": "affected",
|
|
"version": "V3.1.6",
|
|
"lessThan": "*",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
},
|
|
{
|
|
"vendor": "Siemens",
|
|
"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)",
|
|
"versions": [
|
|
{
|
|
"status": "affected",
|
|
"version": "V3.1.7",
|
|
"lessThan": "*",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
},
|
|
{
|
|
"vendor": "Siemens",
|
|
"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)",
|
|
"versions": [
|
|
{
|
|
"status": "affected",
|
|
"version": "V3.1.6",
|
|
"lessThan": "*",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
},
|
|
{
|
|
"vendor": "Siemens",
|
|
"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)",
|
|
"versions": [
|
|
{
|
|
"status": "affected",
|
|
"version": "V3.1.7",
|
|
"lessThan": "*",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
},
|
|
{
|
|
"vendor": "Siemens",
|
|
"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)",
|
|
"versions": [
|
|
{
|
|
"status": "affected",
|
|
"version": "V3.1.6",
|
|
"lessThan": "*",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
},
|
|
{
|
|
"vendor": "Siemens",
|
|
"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)",
|
|
"versions": [
|
|
{
|
|
"status": "affected",
|
|
"version": "V3.1.7",
|
|
"lessThan": "*",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
},
|
|
{
|
|
"vendor": "Siemens",
|
|
"product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)",
|
|
"versions": [
|
|
{
|
|
"status": "affected",
|
|
"version": "V3.1.6",
|
|
"lessThan": "*",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
},
|
|
{
|
|
"vendor": "Siemens",
|
|
"product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)",
|
|
"versions": [
|
|
{
|
|
"status": "affected",
|
|
"version": "V3.1.7",
|
|
"lessThan": "*",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
|
|
},
|
|
{
|
|
"url": "https://cert-portal.siemens.com/productcert/html/ssa-457936.html"
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
} |