{"id":"AZL-102530","summary":"CVE-2026-90321 affecting package kernel 6.6.150.1-1","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: validate inline xattrs during inode block validation\n\nPatch series \"ocfs2: validate xattr entry bounds\", v7.\n\nThis series validates OCFS2 xattr entry name/value bounds when xattr\nmetadata is read and validated, before getxattr() or listxattr() can walk\nout-of-range entry arrays or offsets from corrupted metadata.\n\n\nThis patch (of 2):\n\nocfs2_validate_inode_block() verifies a dinode before OCFS2 users walk\nmetadata from it, but inline xattr metadata is still checked only in\noperation-specific consumers.  The existing ibody lookup helper validates\ninline header placement and entry count, but inode block validation does\nnot reject entry name/value bounds.\n\nAdd a flat xattr entry validator and call it from inode block validation\nfor inline xattrs.  Keep the operation paths on their existing\nheader/count lookup checks; the full entry bounds check now runs when the\ninode block is validated at read time.\n\nReject corrupted inline xattr metadata before ocfs2_xattr_ibody_get() or\nlistxattr() can walk past the inline storage.\n\nValidation reproduced this kernel report:\nBUG: KASAN: use-after-free in ocfs2_xattr_find_entry+0x5a/0x170\nRead of size 2 at addr ffff8881242a2000 by task python3/529\nCall Trace:\n  dump_stack_lvl+0x66/0xa0\n  print_report+0xce/0x630\n  kasan_report+0xe0/0x110\n  ocfs2_xattr_find_entry+0x5a/0x170\n  ocfs2_xattr_get_nolock+0x20a/0x820\n  ocfs2_xattr_get+0x10c/0x1e0\n  __vfs_getxattr+0xe2/0x130\n  vfs_getxattr+0x185/0x1b0","modified":"2026-09-18T14:17:50.552549911Z","published":"2026-09-17T17:17:30Z","upstream":["CVE-2026-90321"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90321"}],"affected":[{"package":{"name":"kernel","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"6.6.150.1-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-102530.json"}}],"schema_version":"1.9.0"}