{"id":"DEBIAN-CVE-2024-26608","details":"In the Linux kernel, the following vulnerability has been resolved:  ksmbd: fix global oob in ksmbd_nl_policy  Similar to a reported issue (check the commit b33fb5b801c6 (\"net: qualcomm: rmnet: fix global oob in rmnet_policy\"), my local fuzzer finds another global out-of-bounds read for policy ksmbd_nl_policy. See bug trace below:  ================================================================== BUG: KASAN: global-out-of-bounds in validate_nla lib/nlattr.c:386 [inline] BUG: KASAN: global-out-of-bounds in __nla_validate_parse+0x24af/0x2750 lib/nlattr.c:600 Read of size 1 at addr ffffffff8f24b100 by task syz-executor.1/62810  CPU: 0 PID: 62810 Comm: syz-executor.1 Tainted: G                 N 6.1.0 #3 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 Call Trace:  \u003cTASK\u003e  __dump_stack lib/dump_stack.c:88 [inline]  dump_stack_lvl+0x8b/0xb3 lib/dump_stack.c:106  print_address_description mm/kasan/report.c:284 [inline]  print_report+0x172/0x475 mm/kasan/report.c:395  kasan_report+0xbb/0x1c0 mm/kasan/report.c:495  validate_nla lib/nlattr.c:386 [inline]  __nla_validate_parse+0x24af/0x2750 lib/nlattr.c:600  __nla_parse+0x3e/0x50 lib/nlattr.c:697  __nlmsg_parse include/net/netlink.h:748 [inline]  genl_family_rcv_msg_attrs_parse.constprop.0+0x1b0/0x290 net/netlink/genetlink.c:565  genl_family_rcv_msg_doit+0xda/0x330 net/netlink/genetlink.c:734  genl_family_rcv_msg net/netlink/genetlink.c:833 [inline]  genl_rcv_msg+0x441/0x780 net/netlink/genetlink.c:850  netlink_rcv_skb+0x14f/0x410 net/netlink/af_netlink.c:2540  genl_rcv+0x24/0x40 net/netlink/genetlink.c:861  netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]  netlink_unicast+0x54e/0x800 net/netlink/af_netlink.c:1345  netlink_sendmsg+0x930/0xe50 net/netlink/af_netlink.c:1921  sock_sendmsg_nosec net/socket.c:714 [inline]  sock_sendmsg+0x154/0x190 net/socket.c:734  ____sys_sendmsg+0x6df/0x840 net/socket.c:2482  ___sys_sendmsg+0x110/0x1b0 net/socket.c:2536  __sys_sendmsg+0xf3/0x1c0 net/socket.c:2565  do_syscall_x64 arch/x86/entry/common.c:50 [inline]  do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80  entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fdd66a8f359 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fdd65e00168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fdd66bbcf80 RCX: 00007fdd66a8f359 RDX: 0000000000000000 RSI: 0000000020000500 RDI: 0000000000000003 RBP: 00007fdd66ada493 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc84b81aff R14: 00007fdd65e00300 R15: 0000000000022000  \u003c/TASK\u003e  The buggy address belongs to the variable:  ksmbd_nl_policy+0x100/0xa80  The buggy address belongs to the physical page: page:0000000034f47940 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1ccc4b flags: 0x200000000001000(reserved|node=0|zone=2) raw: 0200000000001000 ffffea00073312c8 ffffea00073312c8 0000000000000000 raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected  Memory state around the buggy address:  ffffffff8f24b000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ffffffff8f24b080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 \u003effffffff8f24b100: f9 f9 f9 f9 00 00 f9 f9 f9 f9 f9 f9 00 00 07 f9                    ^  ffffffff8f24b180: f9 f9 f9 f9 00 05 f9 f9 f9 f9 f9 f9 00 00 00 05  ffffffff8f24b200: f9 f9 f9 f9 00 00 03 f9 f9 f9 f9 f9 00 00 04 f9 ==================================================================  To fix it, add a placeholder named __KSMBD_EVENT_MAX and let KSMBD_EVENT_MAX to be its original value - 1 according to what other netlink families do. Also change two sites that refer the KSMBD_EVENT_MAX to correct value.","modified":"2026-09-15T09:03:04.785096384Z","published":"2024-03-11T18:15:18.953Z","upstream":["CVE-2024-26608"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2024-26608"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.76-1"}]}],"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~bpo11+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-26608.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.6.15-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-26608.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.6.15-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-26608.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"}]}