{"id":"DEBIAN-CVE-2023-52434","details":"In the Linux kernel, the following vulnerability has been resolved:  smb: client: fix potential OOBs in smb2_parse_contexts()  Validate offsets and lengths before dereferencing create contexts in smb2_parse_contexts().  This fixes following oops when accessing invalid create contexts from server:    BUG: unable to handle page fault for address: ffff8881178d8cc3   #PF: supervisor read access in kernel mode   #PF: error_code(0x0000) - not-present page   PGD 4a01067 P4D 4a01067 PUD 0   Oops: 0000 [#1] PREEMPT SMP NOPTI   CPU: 3 PID: 1736 Comm: mount.cifs Not tainted 6.7.0-rc4 #1   Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS   rel-1.16.2-3-gd478f380-rebuilt.opensuse.org 04/01/2014   RIP: 0010:smb2_parse_contexts+0xa0/0x3a0 [cifs]   Code: f8 10 75 13 48 b8 93 ad 25 50 9c b4 11 e7 49 39 06 0f 84 d2 00   00 00 8b 45 00 85 c0 74 61 41 29 c5 48 01 c5 41 83 fd 0f 76 55 \u003c0f\u003e b7   7d 04 0f b7 45 06 4c 8d 74 3d 00 66 83 f8 04 75 bc ba 04 00   RSP: 0018:ffffc900007939e0 EFLAGS: 00010216   RAX: ffffc90000793c78 RBX: ffff8880180cc000 RCX: ffffc90000793c90   RDX: ffffc90000793cc0 RSI: ffff8880178d8cc0 RDI: ffff8880180cc000   RBP: ffff8881178d8cbf R08: ffffc90000793c22 R09: 0000000000000000   R10: ffff8880180cc000 R11: 0000000000000024 R12: 0000000000000000   R13: 0000000000000020 R14: 0000000000000000 R15: ffffc90000793c22   FS: 00007f873753cbc0(0000) GS:ffff88806bc00000(0000)   knlGS:0000000000000000   CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033   CR2: ffff8881178d8cc3 CR3: 00000000181ca000 CR4: 0000000000750ef0   PKRU: 55555554   Call Trace:    \u003cTASK\u003e    ? __die+0x23/0x70    ? page_fault_oops+0x181/0x480    ? search_module_extables+0x19/0x60    ? srso_alias_return_thunk+0x5/0xfbef5    ? exc_page_fault+0x1b6/0x1c0    ? asm_exc_page_fault+0x26/0x30    ? smb2_parse_contexts+0xa0/0x3a0 [cifs]    SMB2_open+0x38d/0x5f0 [cifs]    ? smb2_is_path_accessible+0x138/0x260 [cifs]    smb2_is_path_accessible+0x138/0x260 [cifs]    cifs_is_path_remote+0x8d/0x230 [cifs]    cifs_mount+0x7e/0x350 [cifs]    cifs_smb3_do_mount+0x128/0x780 [cifs]    smb3_get_tree+0xd9/0x290 [cifs]    vfs_get_tree+0x2c/0x100    ? capable+0x37/0x70    path_mount+0x2d7/0xb80    ? srso_alias_return_thunk+0x5/0xfbef5    ? _raw_spin_unlock_irqrestore+0x44/0x60    __x64_sys_mount+0x11a/0x150    do_syscall_64+0x47/0xf0    entry_SYSCALL_64_after_hwframe+0x6f/0x77   RIP: 0033:0x7f8737657b1e","modified":"2026-09-15T09:02:47.480631823Z","published":"2024-02-20T18:15:50.790Z","upstream":["CVE-2023-52434"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2023-52434"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.82-1"}]}],"versions":["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"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-52434.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.6.8-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-52434.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.6.8-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-52434.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}