{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-68772", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-24T10:30:51.035Z", "datePublished": "2026-01-13T15:28:49.924Z", "dateUpdated": "2026-05-11T21:53:03.304Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T21:53:03.304Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to avoid updating compression context during writeback\n\nBai, Shuangpeng <sjb7183@psu.edu> reported a bug as below:\n\nOops: divide error: 0000 [#1] SMP KASAN PTI\nCPU: 0 UID: 0 PID: 11441 Comm: syz.0.46 Not tainted 6.17.0 #1 PREEMPT(full)\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\nRIP: 0010:f2fs_all_cluster_page_ready+0x106/0x550 fs/f2fs/compress.c:857\nCall Trace:\n <TASK>\n f2fs_write_cache_pages fs/f2fs/data.c:3078 [inline]\n __f2fs_write_data_pages fs/f2fs/data.c:3290 [inline]\n f2fs_write_data_pages+0x1c19/0x3600 fs/f2fs/data.c:3317\n do_writepages+0x38e/0x640 mm/page-writeback.c:2634\n filemap_fdatawrite_wbc mm/filemap.c:386 [inline]\n __filemap_fdatawrite_range mm/filemap.c:419 [inline]\n file_write_and_wait_range+0x2ba/0x3e0 mm/filemap.c:794\n f2fs_do_sync_file+0x6e6/0x1b00 fs/f2fs/file.c:294\n generic_write_sync include/linux/fs.h:3043 [inline]\n f2fs_file_write_iter+0x76e/0x2700 fs/f2fs/file.c:5259\n new_sync_write fs/read_write.c:593 [inline]\n vfs_write+0x7e9/0xe00 fs/read_write.c:686\n ksys_write+0x19d/0x2d0 fs/read_write.c:738\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xf7/0x470 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nThe bug was triggered w/ below race condition:\n\nfsync\t\t\t\tsetattr\t\t\tioctl\n- f2fs_do_sync_file\n - file_write_and_wait_range\n - f2fs_write_cache_pages\n : inode is non-compressed\n : cc.cluster_size =\n F2FS_I(inode)->i_cluster_size = 0\n - tag_pages_for_writeback\n\t\t\t\t- f2fs_setattr\n\t\t\t\t - truncate_setsize\n\t\t\t\t - f2fs_truncate\n\t\t\t\t\t\t\t- f2fs_fileattr_set\n\t\t\t\t\t\t\t - f2fs_setflags_common\n\t\t\t\t\t\t\t - set_compress_context\n\t\t\t\t\t\t\t : F2FS_I(inode)->i_cluster_size = 4\n\t\t\t\t\t\t\t : set_inode_flag(inode, FI_COMPRESSED_FILE)\n - f2fs_compressed_file\n : return true\n - f2fs_all_cluster_page_ready\n : \"pgidx % cc->cluster_size\" trigger dividing 0 issue\n\nLet's change as below to fix this issue:\n- introduce a new atomic type variable .writeback in structure f2fs_inode_info\nto track the number of threads which calling f2fs_write_cache_pages().\n- use .i_sem lock to protect .writeback update.\n- check .writeback before update compression context in f2fs_setflags_common()\nto avoid race w/ ->writepages."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/f2fs/data.c", "fs/f2fs/f2fs.h", "fs/f2fs/file.c", "fs/f2fs/super.c"], "versions": [{"version": "4c8ff7095bef64fc47e996a938f7d57f9e077da3", "lessThan": "ad26bfbc085c939b5dca77ff8c14798c06d151c4", "status": "affected", "versionType": "git"}, {"version": "4c8ff7095bef64fc47e996a938f7d57f9e077da3", "lessThan": "bcd0086ee5a2e88c1224ff2ec1e4a43c83efe5a0", "status": "affected", "versionType": "git"}, {"version": "4c8ff7095bef64fc47e996a938f7d57f9e077da3", "lessThan": "0bf1a02494c7eb5bd43445de4c83c8592e02c4bf", "status": "affected", "versionType": "git"}, {"version": "4c8ff7095bef64fc47e996a938f7d57f9e077da3", "lessThan": "0df713a9c082a474c8b0bcf670edc8e98461d5a0", "status": "affected", "versionType": "git"}, {"version": "4c8ff7095bef64fc47e996a938f7d57f9e077da3", "lessThan": "10b591e7fb7cdc8c1e53e9c000dc0ef7069aaa76", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/f2fs/data.c", "fs/f2fs/f2fs.h", "fs/f2fs/file.c", "fs/f2fs/super.c"], "versions": [{"version": "5.6", "status": "affected"}, {"version": "0", "lessThan": "5.6", "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": "6.12.64", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.3", "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": "5.6", "versionEndExcluding": "6.1.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.6.120"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.12.64"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.18.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.19"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ad26bfbc085c939b5dca77ff8c14798c06d151c4"}, {"url": "https://git.kernel.org/stable/c/bcd0086ee5a2e88c1224ff2ec1e4a43c83efe5a0"}, {"url": "https://git.kernel.org/stable/c/0bf1a02494c7eb5bd43445de4c83c8592e02c4bf"}, {"url": "https://git.kernel.org/stable/c/0df713a9c082a474c8b0bcf670edc8e98461d5a0"}, {"url": "https://git.kernel.org/stable/c/10b591e7fb7cdc8c1e53e9c000dc0ef7069aaa76"}], "title": "f2fs: fix to avoid updating compression context during writeback", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to avoid updating compression context during writeback\n\nBai, Shuangpeng <sjb7183@psu.edu> reported a bug as below:\n\nOops: divide error: 0000 [#1] SMP KASAN PTI\nCPU: 0 UID: 0 PID: 11441 Comm: syz.0.46 Not tainted 6.17.0 #1 PREEMPT(full)\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\nRIP: 0010:f2fs_all_cluster_page_ready+0x106/0x550 fs/f2fs/compress.c:857\nCall Trace:\n <TASK>\n f2fs_write_cache_pages fs/f2fs/data.c:3078 [inline]\n __f2fs_write_data_pages fs/f2fs/data.c:3290 [inline]\n f2fs_write_data_pages+0x1c19/0x3600 fs/f2fs/data.c:3317\n do_writepages+0x38e/0x640 mm/page-writeback.c:2634\n filemap_fdatawrite_wbc mm/filemap.c:386 [inline]\n __filemap_fdatawrite_range mm/filemap.c:419 [inline]\n file_write_and_wait_range+0x2ba/0x3e0 mm/filemap.c:794\n f2fs_do_sync_file+0x6e6/0x1b00 fs/f2fs/file.c:294\n generic_write_sync include/linux/fs.h:3043 [inline]\n f2fs_file_write_iter+0x76e/0x2700 fs/f2fs/file.c:5259\n new_sync_write fs/read_write.c:593 [inline]\n vfs_write+0x7e9/0xe00 fs/read_write.c:686\n ksys_write+0x19d/0x2d0 fs/read_write.c:738\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xf7/0x470 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nThe bug was triggered w/ below race condition:\n\nfsync\t\t\t\tsetattr\t\t\tioctl\n- f2fs_do_sync_file\n - file_write_and_wait_range\n - f2fs_write_cache_pages\n : inode is non-compressed\n : cc.cluster_size =\n F2FS_I(inode)->i_cluster_size = 0\n - tag_pages_for_writeback\n\t\t\t\t- f2fs_setattr\n\t\t\t\t - truncate_setsize\n\t\t\t\t - f2fs_truncate\n\t\t\t\t\t\t\t- f2fs_fileattr_set\n\t\t\t\t\t\t\t - f2fs_setflags_common\n\t\t\t\t\t\t\t - set_compress_context\n\t\t\t\t\t\t\t : F2FS_I(inode)->i_cluster_size = 4\n\t\t\t\t\t\t\t : set_inode_flag(inode, FI_COMPRESSED_FILE)\n - f2fs_compressed_file\n : return true\n - f2fs_all_cluster_page_ready\n : \"pgidx % cc->cluster_size\" trigger dividing 0 issue\n\nLet's change as below to fix this issue:\n- introduce a new atomic type variable .writeback in structure f2fs_inode_info\nto track the number of threads which calling f2fs_write_cache_pages().\n- use .i_sem lock to protect .writeback update.\n- check .writeback before update compression context in f2fs_setflags_common()\nto avoid race w/ ->writepages."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nf2fs: correcci\u00f3n para evitar actualizar el contexto de compresi\u00f3n durante la escritura de retorno\n\nBai, Shuangpeng inform\u00f3 de un error como se detalla a continuaci\u00f3n:\n\nOops: divide error: 0000 [#1] SMP KASAN PTI\nCPU: 0 UID: 0 PID: 11441 Comm: syz.0.46 Not tainted 6.17.0 #1 PREEMPT(full)\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\nRIP: 0010:f2fs_all_cluster_page_ready+0x106/0x550 fs/f2fs/compress.c:857\nCall Trace:\n \n f2fs_write_cache_pages fs/f2fs/data.c:3078 [inline]\n __f2fs_write_data_pages fs/f2fs/data.c:3290 [inline]\n f2fs_write_data_pages+0x1c19/0x3600 fs/f2fs/data.c:3317\n do_writepages+0x38e/0x640 mm/page-writeback.c:2634\n filemap_fdatawrite_wbc mm/filemap.c:386 [inline]\n __filemap_fdatawrite_range mm/filemap.c:419 [inline]\n file_write_and_wait_range+0x2ba/0x3e0 mm/filemap.c:794\n f2fs_do_sync_file+0x6e6/0x1b00 fs/f2fs/file.c:294\n generic_write_sync include/linux/fs.h:3043 [inline]\n f2fs_file_write_iter+0x76e/0x2700 fs/f2fs/file.c:5259\n new_sync_write fs/read_write.c:593 [inline]\n vfs_write+0x7e9/0xe00 fs/read_write.c:686\n ksys_write+0x19d/0x2d0 fs/read_write.c:738\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xf7/0x470 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nEl error se activ\u00f3 con la siguiente condici\u00f3n de carrera:\n\nfsync\t\t\t\tsetattr\t\t\tioctl\n- f2fs_do_sync_file\n - file_write_and_wait_range\n - f2fs_write_cache_pages\n : el inodo no est\u00e1 comprimido\n : cc.cluster_size =\n F2FS_I(inode)-&gt;i_cluster_size = 0\n - tag_pages_for_writeback\n\t\t\t\t- f2fs_setattr\n\t\t\t\t - truncate_setsize\n\t\t\t\t - f2fs_truncate\n\t\t\t\t\t\t\t- f2fs_fileattr_set\n\t\t\t\t\t\t\t - f2fs_setflags_common\n\t\t\t\t\t\t\t - set_compress_context\n\t\t\t\t\t\t\t : F2FS_I(inode)-&gt;i_cluster_size = 4\n\t\t\t\t\t\t\t : set_inode_flag(inode, FI_COMPRESSED_FILE)\n - f2fs_compressed_file\n : return true\n - f2fs_all_cluster_page_ready\n : \"pgidx % cc-&gt;cluster_size\" desencadena el problema de divisi\u00f3n por 0\n\nRealicemos los siguientes cambios para solucionar este problema:\n- introducir una nueva variable de tipo at\u00f3mico .writeback en la estructura f2fs_inode_info para rastrear el n\u00famero de hilos que llaman a f2fs_write_cache_pages().\n- usar el bloqueo .i_sem para proteger la actualizaci\u00f3n de .writeback.\n- verificar .writeback antes de actualizar el contexto de compresi\u00f3n en f2fs_setflags_common() para evitar una condici\u00f3n de carrera con -&gt;writepages."}], "id": "CVE-2025-68772", "lastModified": "2026-04-15T00:35:42.020", "metrics": {}, "published": "2026-01-13T16:15:56.707", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0bf1a02494c7eb5bd43445de4c83c8592e02c4bf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0df713a9c082a474c8b0bcf670edc8e98461d5a0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/10b591e7fb7cdc8c1e53e9c000dc0ef7069aaa76"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ad26bfbc085c939b5dca77ff8c14798c06d151c4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bcd0086ee5a2e88c1224ff2ec1e4a43c83efe5a0"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Deferred"}

{"bugzilla": {"description": "kernel: f2fs: fix to avoid updating compression context during writeback", "id": "2429093", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2429093"}, "csaw": false, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nf2fs: fix to avoid updating compression context during writeback\nBai, Shuangpeng <sjb7183@psu.edu> reported a bug as below:\nOops: divide error: 0000 [#1] SMP KASAN PTI\nCPU: 0 UID: 0 PID: 11441 Comm: syz.0.46 Not tainted 6.17.0 #1 PREEMPT(full)\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\nRIP: 0010:f2fs_all_cluster_page_ready+0x106/0x550 fs/f2fs/compress.c:857\nCall Trace:\n<TASK>\nf2fs_write_cache_pages fs/f2fs/data.c:3078 [inline]\n__f2fs_write_data_pages fs/f2fs/data.c:3290 [inline]\nf2fs_write_data_pages+0x1c19/0x3600 fs/f2fs/data.c:3317\ndo_writepages+0x38e/0x640 mm/page-writeback.c:2634\nfilemap_fdatawrite_wbc mm/filemap.c:386 [inline]\n__filemap_fdatawrite_range mm/filemap.c:419 [inline]\nfile_write_and_wait_range+0x2ba/0x3e0 mm/filemap.c:794\nf2fs_do_sync_file+0x6e6/0x1b00 fs/f2fs/file.c:294\ngeneric_write_sync include/linux/fs.h:3043 [inline]\nf2fs_file_write_iter+0x76e/0x2700 fs/f2fs/file.c:5259\nnew_sync_write fs/read_write.c:593 [inline]\nvfs_write+0x7e9/0xe00 fs/read_write.c:686\nksys_write+0x19d/0x2d0 fs/read_write.c:738\ndo_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\ndo_syscall_64+0xf7/0x470 arch/x86/entry/syscall_64.c:94\nentry_SYSCALL_64_after_hwframe+0x77/0x7f\nThe bug was triggered w/ below race condition:\nfsyncsetattrioctl\n- f2fs_do_sync_file\n- file_write_and_wait_range\n- f2fs_write_cache_pages\n: inode is non-compressed\n: cc.cluster_size =\nF2FS_I(inode)->i_cluster_size = 0\n- tag_pages_for_writeback\n- f2fs_setattr\n- truncate_setsize\n- f2fs_truncate\n- f2fs_fileattr_set\n- f2fs_setflags_common\n- set_compress_context\n: F2FS_I(inode)->i_cluster_size = 4\n: set_inode_flag(inode, FI_COMPRESSED_FILE)\n- f2fs_compressed_file\n: return true\n- f2fs_all_cluster_page_ready\n: \"pgidx % cc->cluster_size\" trigger dividing 0 issue\nLet's change as below to fix this issue:\n- introduce a new atomic type variable .writeback in structure f2fs_inode_info\nto track the number of threads which calling f2fs_write_cache_pages().\n- use .i_sem lock to protect .writeback update.\n- check .writeback before update compression context in f2fs_setflags_common()\nto avoid race w/ ->writepages."], "name": "CVE-2025-68772", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-01-13T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-68772\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-68772\nhttps://lore.kernel.org/linux-cve-announce/2026011358-CVE-2025-68772-9d70@gregkh/T"]}

{}