{"id":"DEBIAN-CVE-2024-50151","details":"In the Linux kernel, the following vulnerability has been resolved:  smb: client: fix OOBs when building SMB2_IOCTL request  When using encryption, either enforced by the server or when using 'seal' mount option, the client will squash all compound request buffers down for encryption into a single iov in smb2_set_next_command().  SMB2_ioctl_init() allocates a small buffer (448 bytes) to hold the SMB2_IOCTL request in the first iov, and if the user passes an input buffer that is greater than 328 bytes, smb2_set_next_command() will end up writing off the end of @rqst-\u003eiov[0].iov_base as shown below:    mount.cifs //srv/share /mnt -o ...,seal   ln -s $(perl -e \"print('a')for 1..1024\") /mnt/link    BUG: KASAN: slab-out-of-bounds in   smb2_set_next_command.cold+0x1d6/0x24c [cifs]   Write of size 4116 at addr ffff8881148fcab8 by task ln/859    CPU: 1 UID: 0 PID: 859 Comm: ln Not tainted 6.12.0-rc3 #1   Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS   1.16.3-2.fc40 04/01/2014   Call Trace:    \u003cTASK\u003e    dump_stack_lvl+0x5d/0x80    ? smb2_set_next_command.cold+0x1d6/0x24c [cifs]    print_report+0x156/0x4d9    ? smb2_set_next_command.cold+0x1d6/0x24c [cifs]    ? __virt_addr_valid+0x145/0x310    ? __phys_addr+0x46/0x90    ? smb2_set_next_command.cold+0x1d6/0x24c [cifs]    kasan_report+0xda/0x110    ? smb2_set_next_command.cold+0x1d6/0x24c [cifs]    kasan_check_range+0x10f/0x1f0    __asan_memcpy+0x3c/0x60    smb2_set_next_command.cold+0x1d6/0x24c [cifs]    smb2_compound_op+0x238c/0x3840 [cifs]    ? kasan_save_track+0x14/0x30    ? kasan_save_free_info+0x3b/0x70    ? vfs_symlink+0x1a1/0x2c0    ? do_symlinkat+0x108/0x1c0    ? __pfx_smb2_compound_op+0x10/0x10 [cifs]    ? kmem_cache_free+0x118/0x3e0    ? cifs_get_writable_path+0xeb/0x1a0 [cifs]    smb2_get_reparse_inode+0x423/0x540 [cifs]    ? __pfx_smb2_get_reparse_inode+0x10/0x10 [cifs]    ? rcu_is_watching+0x20/0x50    ? __kmalloc_noprof+0x37c/0x480    ? smb2_create_reparse_symlink+0x257/0x490 [cifs]    ? smb2_create_reparse_symlink+0x38f/0x490 [cifs]    smb2_create_reparse_symlink+0x38f/0x490 [cifs]    ? __pfx_smb2_create_reparse_symlink+0x10/0x10 [cifs]    ? find_held_lock+0x8a/0xa0    ? hlock_class+0x32/0xb0    ? __build_path_from_dentry_optional_prefix+0x19d/0x2e0 [cifs]    cifs_symlink+0x24f/0x960 [cifs]    ? __pfx_make_vfsuid+0x10/0x10    ? __pfx_cifs_symlink+0x10/0x10 [cifs]    ? make_vfsgid+0x6b/0xc0    ? generic_permission+0x96/0x2d0    vfs_symlink+0x1a1/0x2c0    do_symlinkat+0x108/0x1c0    ? __pfx_do_symlinkat+0x10/0x10    ? strncpy_from_user+0xaa/0x160    __x64_sys_symlinkat+0xb9/0xf0    do_syscall_64+0xbb/0x1d0    entry_SYSCALL_64_after_hwframe+0x77/0x7f   RIP: 0033:0x7f08d75c13bb","modified":"2026-09-15T09:02:59.265836318Z","published":"2024-11-07T10:15:06.780Z","upstream":["CVE-2024-50151"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2024-50151"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.115-1"}]}],"versions":["6.1.106-1","6.1.106-2","6.1.106-3","6.1.112-1","6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1","6.1.94-1~bpo11+1","6.1.98-1","6.1.99-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-50151.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.11.6-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-50151.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.11.6-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-50151.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}