{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-68261", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-16T13:41:40.267Z", "datePublished": "2025-12-16T14:45:03.252Z", "dateUpdated": "2026-08-05T12:10:33.475Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:10:33.475Z" }, "descriptions": [ { "lang": "en", "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 \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" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "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." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/ext4/inline.c" ], "versions": [ { "version": "c755e251357a0cee0679081f08c3f4ba797a8009", "lessThan": "b322bac9f01d03190b5abc52be5d9dd9f22a2b41", "status": "affected", "versionType": "git" }, { "version": "c755e251357a0cee0679081f08c3f4ba797a8009", "lessThan": "61e03dc3794ebf77a706b85e5a36c9c6d70be6de", "status": "affected", "versionType": "git" }, { "version": "c755e251357a0cee0679081f08c3f4ba797a8009", "lessThan": "5b266cf6851ce72b11b067fe02adf5a8687104ad", "status": "affected", "versionType": "git" }, { "version": "c755e251357a0cee0679081f08c3f4ba797a8009", "lessThan": "144c48da33a01d92995aeccd8208eb47d2a8e659", "status": "affected", "versionType": "git" }, { "version": "c755e251357a0cee0679081f08c3f4ba797a8009", "lessThan": "22a76b0861ae61a299c8e126c1aca8c4fda820fd", "status": "affected", "versionType": "git" }, { "version": "c755e251357a0cee0679081f08c3f4ba797a8009", "lessThan": "ba8aeff294ac7ff6dfe293663d815c54c5ee218c", "status": "affected", "versionType": "git" }, { "version": "c755e251357a0cee0679081f08c3f4ba797a8009", "lessThan": "5cad18e527ba8a9ca5463cc170073eeb5a4826f4", "status": "affected", "versionType": "git" }, { "version": "c755e251357a0cee0679081f08c3f4ba797a8009", "lessThan": "0cd8feea8777f8d9b9a862b89c688b049a5c8475", "status": "affected", "versionType": "git" }, { "version": "3e96c3fdcfccb321a9e1623f78cc71b44593e965", "status": "affected", "versionType": "git" }, { "version": "5781ac24bbd998ebb1ff30143bb06244d847af48", "status": "affected", "versionType": "git" }, { "version": "9b06cce3ca4d60d442c39bfa7c058b71b1cee6c2", "status": "affected", "versionType": "git" }, { "version": "da1e40237f8f3516581b534c484c236a79ccfd14", "status": "affected", "versionType": "git" }, { "version": "7cf6b709b6412afd1d93b2c4b37163c3602e3b95", "status": "affected", "versionType": "git" }, { "version": "3.16.44", "lessThan": "3.17", "status": "affected", "versionType": "semver" }, { "version": "3.18.107", "lessThan": "3.19", "status": "affected", "versionType": "semver" }, { "version": "4.4.129", "lessThan": "4.5", "status": "affected", "versionType": "semver" }, { "version": "4.9.14", "lessThan": "4.10", "status": "affected", "versionType": "semver" }, { "version": "4.10.2", "lessThan": "4.11", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/ext4/inline.c" ], "versions": [ { "version": "4.11", "status": "affected" }, { "version": "0", "lessThan": "4.11", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.248", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.198", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.160", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.120", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.62", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.17.12", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.1", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "5.10.248" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "5.15.198" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "6.1.160" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "6.6.120" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "6.12.62" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "6.17.12" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "6.18.1" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "6.19" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.16.44" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18.107" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4.129" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9.14" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/b322bac9f01d03190b5abc52be5d9dd9f22a2b41" }, { "url": "https://git.kernel.org/stable/c/61e03dc3794ebf77a706b85e5a36c9c6d70be6de" }, { "url": "https://git.kernel.org/stable/c/5b266cf6851ce72b11b067fe02adf5a8687104ad" }, { "url": "https://git.kernel.org/stable/c/144c48da33a01d92995aeccd8208eb47d2a8e659" }, { "url": "https://git.kernel.org/stable/c/22a76b0861ae61a299c8e126c1aca8c4fda820fd" }, { "url": "https://git.kernel.org/stable/c/ba8aeff294ac7ff6dfe293663d815c54c5ee218c" }, { "url": "https://git.kernel.org/stable/c/5cad18e527ba8a9ca5463cc170073eeb5a4826f4" }, { "url": "https://git.kernel.org/stable/c/0cd8feea8777f8d9b9a862b89c688b049a5c8475" } ], "title": "ext4: add i_data_sem protection in ext4_destroy_inline_data_nolock()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-06-16T16:25:03.765473Z", "id": "CVE-2025-68261", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-16T16:25:14.265Z" } }, { "x_adpType": "supplier", "providerMetadata": { "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "shortName": "siemens-SADP", "dateUpdated": "2026-07-14T12:43:53.716Z" }, "affected": [ { "vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP", "versions": [ { "status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP", "versions": [ { "status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP", "versions": [ { "status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP", "versions": [ { "status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP", "versions": [ { "status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" } ], "references": [ { "url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html" } ] } ] } }