CVE-2024-56635

一、漏洞信息
 漏洞编号：[CVE-2024-56635](https://nvd.nist.gov/vuln/detail/CVE-2024-56635)
 漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)
 漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.19,6.4.0,6.6.0
 CVSS V3.0分值：
  BaseScore：0.0 None
  Vector：CVSS：3.0/
 漏洞简述：
  In the Linux kernel, the following vulnerability has been resolved:net: avoid potential UAF in default_operstate()syzbot reported an UAF in default_operstate() [1]Issue is a race between device and netns dismantles.After calling __rtnl_unlock() from netdev_run_todo(),we can not assume the netns of each device is still alive.Make sure the device is not in NETREG_UNREGISTERED state,and add an ASSERT_RTNL() before the call to__dev_get_by_index().We might move this ASSERT_RTNL() in __dev_get_by_index()in the future.[1]BUG: KASAN: slab-use-after-free in __dev_get_by_index+0x5d/0x110 net/core/dev.c:852Read of size 8 at addr ffff888043eba1b0 by task syz.0.0/5339CPU: 0 UID: 0 PID: 5339 Comm: syz.0.0 Not tainted 6.12.0-syzkaller-10296-gaaf20f870da0 #0Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014Call Trace: <TASK>  __dump_stack lib/dump_stack.c:94 [inline]  dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120  print_address_description mm/kasan/report.c:378 [inline]  print_report+0x169/0x550 mm/kasan/report.c:489  kasan_report+0x143/0x180 mm/kasan/report.c:602  __dev_get_by_index+0x5d/0x110 net/core/dev.c:852  default_operstate net/core/link_watch.c:51 [inline]  rfc2863_policy+0x224/0x300 net/core/link_watch.c:67  linkwatch_do_dev+0x3e/0x170 net/core/link_watch.c:170  netdev_run_todo+0x461/0x1000 net/core/dev.c:10894  rtnl_unlock net/core/rtnetlink.c:152 [inline]  rtnl_net_unlock include/linux/rtnetlink.h:133 [inline]  rtnl_dellink+0x760/0x8d0 net/core/rtnetlink.c:3520  rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6911  netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2541  netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline]  netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1347  netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1891  sock_sendmsg_nosec net/socket.c:711 [inline]  __sock_sendmsg+0x221/0x270 net/socket.c:726  ____sys_sendmsg+0x52a/0x7e0 net/socket.c:2583  ___sys_sendmsg net/socket.c:2637 [inline]  __sys_sendmsg+0x269/0x350 net/socket.c:2669  do_syscall_x64 arch/x86/entry/common.c:52 [inline]  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7fRIP: 0033:0x7f2a3cb80809Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48RSP: 002b:00007f2a3d9cd058 EFLAGS: 00000246 ORIG_RAX: 000000000000002eRAX: ffffffffffffffda RBX: 00007f2a3cd45fa0 RCX: 00007f2a3cb80809RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000008RBP: 00007f2a3cbf393e R08: 0000000000000000 R09: 0000000000000000R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000R13: 0000000000000000 R14: 00007f2a3cd45fa0 R15: 00007ffd03bc65c8 </TASK>Allocated by task 5339:  kasan_save_stack mm/kasan/common.c:47 [inline]  kasan_save_track+0x3f/0x80 mm/kasan/common.c:68  poison_kmalloc_redzone mm/kasan/common.c:377 [inline]  __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394  kasan_kmalloc include/linux/kasan.h:260 [inline]  __kmalloc_cache_noprof+0x243/0x390 mm/slub.c:4314  kmalloc_noprof include/linux/slab.h:901 [inline]  kmalloc_array_noprof include/linux/slab.h:945 [inline]  netdev_create_hash net/core/dev.c:11870 [inline]  netdev_init+0x10c/0x250 net/core/dev.c:11890  ops_init+0x31e/0x590 net/core/net_namespace.c:138  setup_net+0x287/0x9e0 net/core/net_namespace.c:362  copy_net_ns+0x33f/0x570 net/core/net_namespace.c:500  create_new_namespaces+0x425/0x7b0 kernel/nsproxy.c:110  unshare_nsproxy_namespaces+0x124/0x180 kernel/nsproxy.c:228  ksys_unshare+0x57d/0xa70 kernel/fork.c:3314  __do_sys_unshare kernel/fork.c:3385 [inline]  __se_sys_unshare kernel/fork.c:3383 [inline]  __x64_sys_unshare+0x38/0x40 kernel/fork.c:3383  do_syscall_x64 arch/x86/entry/common.c:52 [inline]  do_syscall_64+0xf3/0x230 arch/x8---truncated---
 漏洞公开时间：2024-12-27 23:15:23
 漏洞创建时间：2024-12-27 23:59:20
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2024-56635
<details>
<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |
| ------- | -------- | -------- |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/316183d58319f191e16503bc2dffa156c4442df2 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/3265aab0736f78bb218200b06b1abb525c316269 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/750e51603395e755537da08f745864c93e3ce741 |  |
| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024122734-CVE-2024-56635-3014@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2334570 |
| debian |  | https://security-tracker.debian.org/tracker/CVE-2024-56635 |

</details>

漏洞分析指导链接：
  https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md
 漏洞数据来源:
  openBrain开源漏洞感知系统
 漏洞补丁信息：
  <details>
<summary>详情(点击展开)</summary>

无
</details>

二、漏洞分析结构反馈
 影响性分析说明：
  Reserved.
 openEuler评分：
  6.4
 Vector：CVSS：3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
 受影响版本排查(受影响/不受影响)：
  1.openEuler-24.03-LTS(6.6.0):受影响
2.openEuler-24.03-LTS-SP1(6.6.0):受影响
3.openEuler-20.03-LTS-SP4(4.19.90):不受影响
4.openEuler-22.03-LTS-SP3(5.10.0):不受影响
5.openEuler-22.03-LTS-SP4(5.10.0):不受影响
6.master(6.6.0):不受影响
7.openEuler-24.03-LTS-Next(6.6.0):不受影响

修复是否涉及abi变化(是/否)：
  1.openEuler-20.03-LTS-SP4(4.19.90):否
2.openEuler-22.03-LTS-SP1(5.10.0):否
3.openEuler-22.03-LTS-SP3(5.10.0):否
4.master(6.6.0):否
5.openEuler-24.03-LTS(6.6.0):否
6.openEuler-24.03-LTS-Next(6.6.0):否
7.openEuler-22.03-LTS-SP4(5.10.0):否
8.openEuler-24.03-LTS-SP1(6.6.0):否

原因说明：
  1.openEuler-24.03-LTS(6.6.0):正常修复
2.openEuler-24.03-LTS-SP1(6.6.0):正常修复
3.master(6.6.0):不受影响-漏洞代码不能被攻击者触发
4.openEuler-24.03-LTS-Next(6.6.0):不受影响-漏洞代码不能被攻击者触发
5.openEuler-20.03-LTS-SP4(4.19.90):不受影响-漏洞代码不存在
6.openEuler-22.03-LTS-SP3(5.10.0):不受影响-漏洞代码不存在
7.openEuler-22.03-LTS-SP4(5.10.0):不受影响-漏洞代码不存在

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