{"id":"AZL-54165","summary":"CVE-2024-53139 affecting package kernel for versions less than 6.6.64.2-1","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: fix possible UAF in sctp_v6_available()\n\nA lockdep report [1] with CONFIG_PROVE_RCU_LIST=y hints\nthat sctp_v6_available() is calling dev_get_by_index_rcu()\nand ipv6_chk_addr() without holding rcu.\n\n[1]\n =============================\n WARNING: suspicious RCU usage\n 6.12.0-rc5-virtme #1216 Tainted: G        W\n -----------------------------\n net/core/dev.c:876 RCU-list traversed in non-reader section!!\n\nother info that might help us debug this:\n\nrcu_scheduler_active = 2, debug_locks = 1\n 1 lock held by sctp_hello/31495:\n #0: ffff9f1ebbdb7418 (sk_lock-AF_INET6){+.+.}-{0:0}, at: sctp_bind (./arch/x86/include/asm/jump_label.h:27 net/sctp/socket.c:315) sctp\n\nstack backtrace:\n CPU: 7 UID: 0 PID: 31495 Comm: sctp_hello Tainted: G        W          6.12.0-rc5-virtme #1216\n Tainted: [W]=WARN\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n Call Trace:\n  \u003cTASK\u003e\n dump_stack_lvl (lib/dump_stack.c:123)\n lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822)\n dev_get_by_index_rcu (net/core/dev.c:876 (discriminator 7))\n sctp_v6_available (net/sctp/ipv6.c:701) sctp\n sctp_do_bind (net/sctp/socket.c:400 (discriminator 1)) sctp\n sctp_bind (net/sctp/socket.c:320) sctp\n inet6_bind_sk (net/ipv6/af_inet6.c:465)\n ? security_socket_bind (security/security.c:4581 (discriminator 1))\n __sys_bind (net/socket.c:1848 net/socket.c:1869)\n ? do_user_addr_fault (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 ./include/linux/mm.h:729 arch/x86/mm/fault.c:1340)\n ? do_user_addr_fault (./arch/x86/include/asm/preempt.h:84 (discriminator 13) ./include/linux/rcupdate.h:98 (discriminator 13) ./include/linux/rcupdate.h:882 (discriminator 13) ./include/linux/mm.h:729 (discriminator 13) arch/x86/mm/fault.c:1340 (discriminator 13))\n __x64_sys_bind (net/socket.c:1877 (discriminator 1) net/socket.c:1875 (discriminator 1) net/socket.c:1875 (discriminator 1))\n do_syscall_64 (arch/x86/entry/common.c:52 (discriminator 1) arch/x86/entry/common.c:83 (discriminator 1))\n entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)\n RIP: 0033:0x7f59b934a1e7\n Code: 44 00 00 48 8b 15 39 8c 0c 00 f7 d8 64 89 02 b8 ff ff ff ff eb bd 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 b8 31 00 00 00 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 8b 0d 09 8c 0c 00 f7 d8 64 89 01 48\nAll code\n========\n   0:\t44 00 00             \tadd    %r8b,(%rax)\n   3:\t48 8b 15 39 8c 0c 00 \tmov    0xc8c39(%rip),%rdx        # 0xc8c43\n   a:\tf7 d8                \tneg    %eax\n   c:\t64 89 02             \tmov    %eax,%fs:(%rdx)\n   f:\tb8 ff ff ff ff       \tmov    $0xffffffff,%eax\n  14:\teb bd                \tjmp    0xffffffffffffffd3\n  16:\t66 2e 0f 1f 84 00 00 \tcs nopw 0x0(%rax,%rax,1)\n  1d:\t00 00 00\n  20:\t0f 1f 00             \tnopl   (%rax)\n  23:\tb8 31 00 00 00       \tmov    $0x31,%eax\n  28:\t0f 05                \tsyscall\n  2a:*\t48 3d 01 f0 ff ff    \tcmp    $0xfffffffffffff001,%rax\t\t\u003c-- trapping instruction\n  30:\t73 01                \tjae    0x33\n  32:\tc3                   \tret\n  33:\t48 8b 0d 09 8c 0c 00 \tmov    0xc8c09(%rip),%rcx        # 0xc8c43\n  3a:\tf7 d8                \tneg    %eax\n  3c:\t64 89 01             \tmov    %eax,%fs:(%rcx)\n  3f:\t48                   \trex.W\n\nCode starting with the faulting instruction\n===========================================\n   0:\t48 3d 01 f0 ff ff    \tcmp    $0xfffffffffffff001,%rax\n   6:\t73 01                \tjae    0x9\n   8:\tc3                   \tret\n   9:\t48 8b 0d 09 8c 0c 00 \tmov    0xc8c09(%rip),%rcx        # 0xc8c19\n  10:\tf7 d8                \tneg    %eax\n  12:\t64 89 01             \tmov    %eax,%fs:(%rcx)\n  15:\t48                   \trex.W\n RSP: 002b:00007ffe2d0ad398 EFLAGS: 00000202 ORIG_RAX: 0000000000000031\n RAX: ffffffffffffffda RBX: 00007ffe2d0ad3d0 RCX: 00007f59b934a1e7\n RDX: 000000000000001c RSI: 00007ffe2d0ad3d0 RDI: 0000000000000005\n RBP: 0000000000000005 R08: 1999999999999999 R09: 0000000000000000\n R10: 00007f59b9253298 R11: 000000000000\n---truncated---","modified":"2026-04-01T05:18:12.849329Z","published":"2024-12-04T15:15:15Z","upstream":["CVE-2024-53139"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-53139"}],"affected":[{"package":{"name":"kernel","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.6.64.2-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-54165.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}