{"id":"CVE-2025-38337","summary":"jbd2: fix data-race and null-ptr-deref in jbd2_journal_dirty_metadata()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\njbd2: fix data-race and null-ptr-deref in jbd2_journal_dirty_metadata()\n\nSince handle-\u003eh_transaction may be a NULL pointer, so we should change it\nto call is_handle_aborted(handle) first before dereferencing it.\n\nAnd the following data-race was reported in my fuzzer:\n\n==================================================================\nBUG: KCSAN: data-race in jbd2_journal_dirty_metadata / jbd2_journal_dirty_metadata\n\nwrite to 0xffff888011024104 of 4 bytes by task 10881 on cpu 1:\n jbd2_journal_dirty_metadata+0x2a5/0x770 fs/jbd2/transaction.c:1556\n __ext4_handle_dirty_metadata+0xe7/0x4b0 fs/ext4/ext4_jbd2.c:358\n ext4_do_update_inode fs/ext4/inode.c:5220 [inline]\n ext4_mark_iloc_dirty+0x32c/0xd50 fs/ext4/inode.c:5869\n __ext4_mark_inode_dirty+0xe1/0x450 fs/ext4/inode.c:6074\n ext4_dirty_inode+0x98/0xc0 fs/ext4/inode.c:6103\n....\n\nread to 0xffff888011024104 of 4 bytes by task 10880 on cpu 0:\n jbd2_journal_dirty_metadata+0xf2/0x770 fs/jbd2/transaction.c:1512\n __ext4_handle_dirty_metadata+0xe7/0x4b0 fs/ext4/ext4_jbd2.c:358\n ext4_do_update_inode fs/ext4/inode.c:5220 [inline]\n ext4_mark_iloc_dirty+0x32c/0xd50 fs/ext4/inode.c:5869\n __ext4_mark_inode_dirty+0xe1/0x450 fs/ext4/inode.c:6074\n ext4_dirty_inode+0x98/0xc0 fs/ext4/inode.c:6103\n....\n\nvalue changed: 0x00000000 -\u003e 0x00000001\n==================================================================\n\nThis issue is caused by missing data-race annotation for jh-\u003eb_modified.\nTherefore, the missing annotation needs to be added.","modified":"2026-04-16T04:35:38.013304110Z","published":"2025-07-10T08:15:08.396Z","related":["SUSE-SU-2025:02846-1","SUSE-SU-2025:02853-1","SUSE-SU-2025:02923-1","SUSE-SU-2025:02969-1","SUSE-SU-2025:02996-1","SUSE-SU-2025:02997-1","SUSE-SU-2025:03011-1","SUSE-SU-2025:03023-1","SUSE-SU-2025:20577-1","SUSE-SU-2025:20586-1","SUSE-SU-2025:20601-1","SUSE-SU-2025:20602-1","SUSE-SU-2025:21074-1","SUSE-SU-2025:21139-1","SUSE-SU-2025:21179-1","openSUSE-SU-2025:20081-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38337.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/23361b479f2700c00960d3ae9cdc8ededa762d47"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2e7c64d7a92c031d016f11c8e8cb05131ab7b75a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/43d5e3bb5f1dcd91e30238ea0b59a5f77063f84e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5c1a34ff5b0bfdfd2f9343aa9b08d25df618bac5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a377996d714afb8d4d5f4906336f78510039da29"},{"type":"WEB","url":"https://git.kernel.org/stable/c/af98b0157adf6504fade79b3e6cb260c4ff68e37"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ec669e5bf409f16e464bfad75f0ba039a45de29a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f78b38af3540b4875147b7b884ee11a27b3dbf4c"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38337.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-38337"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6e06ae88edae77379bef7c0cb7d3c2dd88676867"},{"fixed":"5c1a34ff5b0bfdfd2f9343aa9b08d25df618bac5"},{"fixed":"ec669e5bf409f16e464bfad75f0ba039a45de29a"},{"fixed":"43d5e3bb5f1dcd91e30238ea0b59a5f77063f84e"},{"fixed":"23361b479f2700c00960d3ae9cdc8ededa762d47"},{"fixed":"2e7c64d7a92c031d016f11c8e8cb05131ab7b75a"},{"fixed":"f78b38af3540b4875147b7b884ee11a27b3dbf4c"},{"fixed":"a377996d714afb8d4d5f4906336f78510039da29"},{"fixed":"af98b0157adf6504fade79b3e6cb260c4ff68e37"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38337.json"}}],"schema_version":"1.7.5"}