{"id":"CVE-2025-68261","title":"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_da…","summary":"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_da…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= c755e251357a0cee0679081f08c3f4ba797a8009 < b322bac9f01d03190b5abc52be5d9dd9f22a2b41","Linux >= c755e251357a0cee0679081f08c3f4ba797a8009 < 61e03dc3794ebf77a706b85e5a36c9c6d70be6de","Linux >= c755e251357a0cee0679081f08c3f4ba797a8009 < 5b266cf6851ce72b11b067fe02adf5a8687104ad","Linux >= c755e251357a0cee0679081f08c3f4ba797a8009 < 144c48da33a01d92995aeccd8208eb47d2a8e659","Linux >= c755e251357a0cee0679081f08c3f4ba797a8009 < 22a76b0861ae61a299c8e126c1aca8c4fda820fd","Linux >= c755e251357a0cee0679081f08c3f4ba797a8009 < ba8aeff294ac7ff6dfe293663d815c54c5ee218c","Linux >= c755e251357a0cee0679081f08c3f4ba797a8009 < 5cad18e527ba8a9ca5463cc170073eeb5a4826f4","Linux >= c755e251357a0cee0679081f08c3f4ba797a8009 < 0cd8feea8777f8d9b9a862b89c688b049a5c8475","Linux 3e96c3fdcfccb321a9e1623f78cc71b44593e965","Linux 5781ac24bbd998ebb1ff30143bb06244d847af48","Linux 9b06cce3ca4d60d442c39bfa7c058b71b1cee6c2","Linux da1e40237f8f3516581b534c484c236a79ccfd14","Linux 7cf6b709b6412afd1d93b2c4b37163c3602e3b95","Linux >= 3.16.44 < 3.17","Linux >= 3.18.107 < 3.19","Linux >= 4.4.129 < 4.5","Linux >= 4.9.14 < 4.10","Linux >= 4.10.2 < 4.11","Linux 4.11"],"published":"2025-12-16","updated":"2026-10-15","sourceUpdated":"2026-10-15T02:18:10.843","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-68261","references":[{"url":"https://git.kernel.org/stable/c/0cd8feea8777f8d9b9a862b89c688b049a5c8475","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/144c48da33a01d92995aeccd8208eb47d2a8e659","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/22a76b0861ae61a299c8e126c1aca8c4fda820fd","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5b266cf6851ce72b11b067fe02adf5a8687104ad","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5cad18e527ba8a9ca5463cc170073eeb5a4826f4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/61e03dc3794ebf77a706b85e5a36c9c6d70be6de","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b322bac9f01d03190b5abc52be5d9dd9f22a2b41","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ba8aeff294ac7ff6dfe293663d815c54c5ee218c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-019113.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-457936.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-68261.json"},{"url":"https://access.redhat.com/security/cve/CVE-2025-68261"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2422772"},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-68261"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-68261"},{"url":"https://lore.kernel.org/linux-cve-announce/2025121614-CVE-2025-68261-4e23@gregkh/T"}],"tags":["nvd","cve.org","csaf","vex","red-hat","score-dispute"],"epss":0.00552,"epssPercentile":0.45937,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-06-16T16:25:03.765473Z"},"ingestedAt":"2026-09-08T15:33:26.996Z","cwe":["CWE-367"],"scores":{"nvd":7.5,"vendor":5.5},"slug":"CVE-2025-68261","body":"## Overview\n\nIn 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\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-68261.json)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}