{ "schema_version": "1.6.1", "id": "RPI-CVE-2024-53139", "modified": "2026-10-09T11:39:44Z", "upstream": [ "CVE-2024-53139" ], "published": "2024-12-04T14:29:17Z", "summary": "sctp: fix possible UAF in sctp_v6_available()", "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 \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 <48> 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<-- 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---", "severity": [ { "type": "CVSS_V3", "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H" } ], "affected": [ { "package": { "ecosystem": "Raspberry Pi OS:12", "name": "linux" }, "versions": [ "1:6.6.20-1+rpt1", "1:6.6.28-1+rpt1", "1:6.6.31-1+rpt1", "1:6.6.47-1+rpt1", "1:6.6.51-1+rpt1", "1:6.6.51-1+rpt2", "1:6.6.51-1+rpt3", "1:6.6.62-1+rpt1" ], "ecosystem_specific": { "binaries": [ { "binary_name": "linux-image-6.6.20+rpt-rpi-2712", "binary_version": "1:6.6.20-1+rpt1" }, { "binary_name": "linux-image-6.6.20+rpt-rpi-v6", "binary_version": "1:6.6.20-1+rpt1" }, { "binary_name": "linux-image-6.6.20+rpt-rpi-v7", "binary_version": "1:6.6.20-1+rpt1" }, { "binary_name": "linux-image-6.6.20+rpt-rpi-v7l", "binary_version": "1:6.6.20-1+rpt1" }, { "binary_name": "linux-image-6.6.20+rpt-rpi-v8", "binary_version": "1:6.6.20-1+rpt1" }, { "binary_name": "linux-image-6.6.28+rpt-rpi-2712", "binary_version": "1:6.6.28-1+rpt1" }, { "binary_name": "linux-image-6.6.28+rpt-rpi-v6", "binary_version": "1:6.6.28-1+rpt1" }, { "binary_name": "linux-image-6.6.28+rpt-rpi-v7", "binary_version": "1:6.6.28-1+rpt1" }, { "binary_name": "linux-image-6.6.28+rpt-rpi-v7l", "binary_version": "1:6.6.28-1+rpt1" }, { "binary_name": "linux-image-6.6.28+rpt-rpi-v8", "binary_version": "1:6.6.28-1+rpt1" }, { "binary_name": "linux-image-6.6.31+rpt-rpi-2712", "binary_version": "1:6.6.31-1+rpt1" }, { "binary_name": "linux-image-6.6.31+rpt-rpi-v6", "binary_version": "1:6.6.31-1+rpt1" }, { "binary_name": "linux-image-6.6.31+rpt-rpi-v7", "binary_version": "1:6.6.31-1+rpt1" }, { "binary_name": "linux-image-6.6.31+rpt-rpi-v7l", "binary_version": "1:6.6.31-1+rpt1" }, { "binary_name": "linux-image-6.6.31+rpt-rpi-v8", "binary_version": "1:6.6.31-1+rpt1" }, { "binary_name": "linux-image-6.6.47+rpt-rpi-2712", "binary_version": "1:6.6.47-1+rpt1" }, { "binary_name": "linux-image-6.6.47+rpt-rpi-v6", "binary_version": "1:6.6.47-1+rpt1" }, { "binary_name": "linux-image-6.6.47+rpt-rpi-v7", "binary_version": "1:6.6.47-1+rpt1" }, { "binary_name": "linux-image-6.6.47+rpt-rpi-v7l", "binary_version": "1:6.6.47-1+rpt1" }, { "binary_name": "linux-image-6.6.47+rpt-rpi-v8", "binary_version": "1:6.6.47-1+rpt1" }, { "binary_name": "linux-image-6.6.51+rpt-rpi-2712", "binary_version": "1:6.6.51-1+rpt1" }, { "binary_name": "linux-image-6.6.51+rpt-rpi-v6", "binary_version": "1:6.6.51-1+rpt1" }, { "binary_name": "linux-image-6.6.51+rpt-rpi-v7", "binary_version": "1:6.6.51-1+rpt1" }, { "binary_name": "linux-image-6.6.51+rpt-rpi-v7l", "binary_version": "1:6.6.51-1+rpt1" }, { "binary_name": "linux-image-6.6.51+rpt-rpi-v8", "binary_version": "1:6.6.51-1+rpt1" }, { "binary_name": "linux-image-6.6.51+rpt-rpi-2712", "binary_version": "1:6.6.51-1+rpt2" }, { "binary_name": "linux-image-6.6.51+rpt-rpi-v6", "binary_version": "1:6.6.51-1+rpt2" }, { "binary_name": "linux-image-6.6.51+rpt-rpi-v7", "binary_version": "1:6.6.51-1+rpt2" }, { "binary_name": "linux-image-6.6.51+rpt-rpi-v7l", "binary_version": "1:6.6.51-1+rpt2" }, { "binary_name": "linux-image-6.6.51+rpt-rpi-v8", "binary_version": "1:6.6.51-1+rpt2" }, { "binary_name": "linux-image-6.6.51+rpt-rpi-2712", "binary_version": "1:6.6.51-1+rpt3" }, { "binary_name": "linux-image-6.6.51+rpt-rpi-v6", "binary_version": "1:6.6.51-1+rpt3" }, { "binary_name": "linux-image-6.6.51+rpt-rpi-v7", "binary_version": "1:6.6.51-1+rpt3" }, { "binary_name": "linux-image-6.6.51+rpt-rpi-v7l", "binary_version": "1:6.6.51-1+rpt3" }, { "binary_name": "linux-image-6.6.51+rpt-rpi-v8", "binary_version": "1:6.6.51-1+rpt3" }, { "binary_name": "linux-image-6.6.62+rpt-rpi-2712", "binary_version": "1:6.6.62-1+rpt1" }, { "binary_name": "linux-image-6.6.62+rpt-rpi-v6", "binary_version": "1:6.6.62-1+rpt1" }, { "binary_name": "linux-image-6.6.62+rpt-rpi-v7", "binary_version": "1:6.6.62-1+rpt1" }, { "binary_name": "linux-image-6.6.62+rpt-rpi-v7l", "binary_version": "1:6.6.62-1+rpt1" }, { "binary_name": "linux-image-6.6.62+rpt-rpi-v8", "binary_version": "1:6.6.62-1+rpt1" } ] }, "database_specific": { "per_version": { "1:6.6.20-1+rpt1": { "linux_commit": "6f16847710cc0502450788b9f12f0a14d3429668", "upstream_version": "6.6.20", "assessment": "commit ancestry (strak rule)", "upstream_fixed": "6.6.63" }, "1:6.6.28-1+rpt1": { "linux_commit": "0c341f47adc3578cd5f817aa20ee2b7f9ae6b23e", "upstream_version": "6.6.28", "assessment": "commit ancestry (strak rule)", "upstream_fixed": "6.6.63" }, "1:6.6.31-1+rpt1": { "linux_commit": "c1432b4bae5b6582f4d32ba381459f33c34d1424", "upstream_version": "6.6.31", "assessment": "commit ancestry (strak rule)", "upstream_fixed": "6.6.63" }, "1:6.6.47-1+rpt1": { "linux_commit": "cf64a1dfecc2dc418efdd61701c1a4b185ab4761", "upstream_version": "6.6.47", "assessment": "commit ancestry (strak rule)", "upstream_fixed": "6.6.63" }, "1:6.6.51-1+rpt1": { "linux_commit": "0094eba3f2a4338cfa6854b0b5104d02ba0fa01f", "upstream_version": "6.6.51", "assessment": "commit ancestry (strak rule)", "upstream_fixed": "6.6.63" }, "1:6.6.51-1+rpt2": { "linux_commit": "82a50e430ef1d6eb37d78e25aa572c1f6ea56160", "upstream_version": "6.6.51", "assessment": "commit ancestry (strak rule)", "upstream_fixed": "6.6.63" }, "1:6.6.51-1+rpt3": { "linux_commit": "5aeecea9f4a45248bcf564dec924965e066a7bfd", "upstream_version": "6.6.51", "assessment": "commit ancestry (strak rule)", "upstream_fixed": "6.6.63" }, "1:6.6.62-1+rpt1": { "linux_commit": "dd2394360860d15146c96635796a75b05bb32b61", "upstream_version": "6.6.62", "assessment": "commit ancestry (strak rule)", "upstream_fixed": "6.6.63" } } } } ], "references": [ { "type": "ADVISORY", "url": "https://www.cve.org/CVERecord?id=CVE-2024-53139" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/ad975697211f4f2c4ce61c3ba524fd14d88ceab8" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/05656a66592759242c74063616291b7274d11b2f" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/eb72e7fcc83987d5d5595b43222f23b295d5de7f" } ], "database_specific": { "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git", "upstream_modified": "2026-08-05T11:52:36Z", "severity": { "source": "kernel CNA", "cvss_v3_score": 7.8, "cvss_v3_severity": "High", "scenario": "AV:L - The vulnerable function is only reachable through the local `bind(2)` syscall or `SCTP_SOCKOPT_BINDX_ADD` setsockopt on an AF_INET6 SCTP socket; `available()` is not invoked from any packet-receive path, so no remote peer can trigger it.\nAC:L - The attacker controls both sides of the race \u2014 one thread spins on retryable failing `bind()` calls while another deletes/recreates the bound netdev in its own netns \u2014 and because no RCU read lock or preempt-disable is held, the task can be preempted inside the lookup-to-dereference window, widening it arbitrarily.\nPR:L - An unprivileged local user can obtain everything required via `unshare -Urn`, which grants CAP_NET_RAW for `SO_BINDTODEVICE` (to set `sk_bound_dev_if`) and CAP_NET_ADMIN to create and destroy the raced network device; no real root in the init namespace is needed.\nUI:N - The attacker drives the entire sequence \u2014 socket creation, device binding, bind loop and netdev teardown \u2014 from its own processes with no action by any other user.\nS:U - The use-after-free occurs in kernel memory and its impact stays within the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The freed `net_device` is dereferenced (`dev->ifindex`, `dev->priv_flags`, `dev->adj_list.upper` \u2192 `upper->master`/`upper->dev`), and reallocating that slab slot with attacker-groomed data yields a controlled pointer dereference usable as a kernel memory read primitive.\nI:H - Use-after-free of a large, heap-sprayable `net_device` allocation lets the attacker place controlled data under the dangling pointer and steer subsequent kernel pointer chases, which is the standard basis for escalating to control-flow/data corruption; it also lets the bind-permission decision itself be falsified.\nA:H - Following a dangling `index_hlist.next` or dereferencing a stale `net_device`/`netdev_adjacent` pointer produces a wild read and kernel oops or panic, and the attacker can retrigger it in a loop." } } }