{"id":"AZL-64986","summary":"CVE-2025-38337 affecting package kernel for versions less than 6.6.96.1-1","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":"2026-04-01T05:20:27.151582Z","published":"2025-07-10T09:15:28Z","upstream":["CVE-2025-38337"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-38337"}],"affected":[{"package":{"name":"kernel","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.6.96.1-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-64986.json"}}],"schema_version":"1.7.5"}