{"apiVersion":"1.0","identifier":"CVE-2026-80656","description":"In the Linux kernel, the following vulnerability has been resolved: hfsplus: Add a sanity check for btree node size Syzbot reported an uninit-value bug in [1] with a corrupted HFS+ image, during the file system mounting process, specifically while loading the catalog, a corrupted node_size value of 1 caused the rec_off argument passed to hfs_bnode_read_u16() (within hfs_bnode_find()) to be excessively large. Consequently, the function failed to return a valid value to initialize the off variable, triggering the bug [1]. Every node starts from BTree node descriptor: struct hfs_bnode_desc. So, the size of node cannot be lesser than that. However, technical specification declares that: -The node size (which is expressed in bytes) must be power of two, from 512 through 32,768, inclusive.- Add a check for btree node size base on technical specification. [1] BUG: KMSAN: uninit-value in hfsplus_bnode_find+0x141c/0x1600 fs/hfsplus/bnode.c:584 hfsplus_bnode_find+0x141c/0x1600 fs/hfsplus/bnode.c:584 hfsplus_btree_open+0x169a/0x1e40 fs/hfsplus/btree.c:382 hfsplus_fill_super+0x111f/0x2770 fs/hfsplus/super.c:553 get_tree_bdev_flags+0x6e6/0x920 fs/super.c:1694 get_tree_bdev+0x38/0x50 fs/super.c:1717 hfsplus_get_tree+0x35/0x40 fs/hfsplus/super.c:709 vfs_get_tree+0xb3/0x5d0 fs/super.c:1754 fc_mount fs/namespace.c:1193 [inline]","publishedAt":"2026-08-28T08:16:50","lastModifiedAt":"2026-08-28T08:16:50","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-80656","cvssScore":null,"cvssVector":"Pending","epssProbability":0.00155,"riskScore":0,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-80656","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-80656","en":"https://www.redsauce.net/en/cves/CVE-2026-80656","fr":"https://www.redsauce.net/fr/cves/CVE-2026-80656","pt":"https://www.redsauce.net/pt/cves/CVE-2026-80656","de":"https://www.redsauce.net/de/cves/CVE-2026-80656","sk":"https://www.redsauce.net/sk/cves/CVE-2026-80656","el":"https://www.redsauce.net/el/cves/CVE-2026-80656"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-80656"}}