CVE-2024-44946

一、漏洞信息
 漏洞编号：[CVE-2024-44946](https://nvd.nist.gov/vuln/detail/CVE-2024-44946)
 漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)
 漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0,6.6.0
 CVSS V3.0分值：
  BaseScore：5.5 Medium
  Vector：CVSS：3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
 漏洞简述：
  In the Linux kernel, the following vulnerability has been resolved:kcm: Serialise kcm_sendmsg() for the same socket.syzkaller reported UAF in kcm_release(). [0]The scenario is  1. Thread A builds a skb with MSG_MORE and sets kcm->seq_skb.  2. Thread A resumes building skb from kcm->seq_skb but is blocked     by sk_stream_wait_memory()  3. Thread B calls sendmsg() concurrently, finishes building kcm->seq_skb     and puts the skb to the write queue  4. Thread A faces an error and finally frees skb that is already in the     write queue  5. kcm_release() does double-free the skb in the write queueWhen a thread is building a MSG_MORE skb, another thread must not touch it.Let s add a per-sk mutex and serialise kcm_sendmsg().[0]:BUG: KASAN: slab-use-after-free in __skb_unlink include/linux/skbuff.h:2366 [inline]BUG: KASAN: slab-use-after-free in __skb_dequeue include/linux/skbuff.h:2385 [inline]BUG: KASAN: slab-use-after-free in __skb_queue_purge_reason include/linux/skbuff.h:3175 [inline]BUG: KASAN: slab-use-after-free in __skb_queue_purge include/linux/skbuff.h:3181 [inline]BUG: KASAN: slab-use-after-free in kcm_release+0x170/0x4c8 net/kcm/kcmsock.c:1691Read of size 8 at addr ffff0000ced0fc80 by task syz-executor329/6167CPU: 1 PID: 6167 Comm: syz-executor329 Tainted: G    B              6.8.0-rc5-syzkaller-g9abbc24128bc #0Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:291 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:298 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:377 [inline] print_report+0x178/0x518 mm/kasan/report.c:488 kasan_report+0xd8/0x138 mm/kasan/report.c:601 __asan_report_load8_noabort+0x20/0x2c mm/kasan/report_generic.c:381 __skb_unlink include/linux/skbuff.h:2366 [inline] __skb_dequeue include/linux/skbuff.h:2385 [inline] __skb_queue_purge_reason include/linux/skbuff.h:3175 [inline] __skb_queue_purge include/linux/skbuff.h:3181 [inline] kcm_release+0x170/0x4c8 net/kcm/kcmsock.c:1691 __sock_release net/socket.c:659 [inline] sock_close+0xa4/0x1e8 net/socket.c:1421 __fput+0x30c/0x738 fs/file_table.c:376 ____fput+0x20/0x30 fs/file_table.c:404 task_work_run+0x230/0x2e0 kernel/task_work.c:180 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0x618/0x1f64 kernel/exit.c:871 do_group_exit+0x194/0x22c kernel/exit.c:1020 get_signal+0x1500/0x15ec kernel/signal.c:2893 do_signal+0x23c/0x3b44 arch/arm64/kernel/signal.c:1249 do_notify_resume+0x74/0x1f4 arch/arm64/kernel/entry-common.c:148 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:713 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598Allocated by task 6166: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:68 kasan_save_alloc_info+0x70/0x84 mm/kasan/generic.c:626 unpoison_slab_object mm/kasan/common.c:314 [inline] __kasan_slab_alloc+0x74/0x8c mm/kasan/common.c:340 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3813 [inline] slab_alloc_node mm/slub.c:3860 [inline] kmem_cache_alloc_node+0x204/0x4c0 mm/slub.c:3903 __alloc_skb+0x19c/0x3d8 net/core/skbuff.c:641 alloc_skb include/linux/skbuff.h:1296 [inline] kcm_sendmsg+0x1d3c/0x2124 net/kcm/kcmsock.c:783 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] sock_sendmsg+0x220/0x2c0 net/socket.c:768 splice_to_socket+0x7cc/0xd58 fs/splice.c:889 do_splice_from fs/splice.c:941 [inline] direct_splice_actor+0xec/0x1d8 fs/splice.c:1164 splice_direct_to_actor+0x438/0xa0c fs/splice.c:1108 do_splice_direct_actor ---truncated---
 漏洞公开时间：2024-08-31 22:15:04
 漏洞创建时间：2024-08-31 22:26:08
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2024-44946
<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/00425508f30baa5ab6449a1f478480ca7cffa6da |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/6633b17840bf828921254d788ccd15602843fe9b |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/72da240aafb142630cf16adc803ccdacb3780849 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/807067bf014d4a3ae2cc55bd3de16f22a01eb580 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/8c9cdbf600143bd6835c8b8351e5ac956da79aec |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9c8d544ed619f704e2b70e63e08ab75630c2ea23 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/eb06c8d3022ce6738711191c89f9b3e9cfb91914 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/fa6c23fe6dcac8c8bd63920ee8681292a2bd544e |  |
| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-44946 | https://bugzilla.suse.com/show_bug.cgi?id=1230015 |
| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-44946.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1230015 |
| suse_bugzilla | https://git.kernel.org/stable/c/72da240aafb142630cf16adc803ccdacb3780849 | https://bugzilla.suse.com/show_bug.cgi?id=1230015 |
| suse_bugzilla | https://git.kernel.org/stable/c/00425508f30baa5ab6449a1f478480ca7cffa6da | https://bugzilla.suse.com/show_bug.cgi?id=1230015 |
| suse_bugzilla | https://git.kernel.org/stable/c/9c8d544ed619f704e2b70e63e08ab75630c2ea23 | https://bugzilla.suse.com/show_bug.cgi?id=1230015 |
| suse_bugzilla | https://git.kernel.org/stable/c/807067bf014d4a3ae2cc55bd3de16f22a01eb580 | https://bugzilla.suse.com/show_bug.cgi?id=1230015 |
| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-44946 | https://bugzilla.suse.com/show_bug.cgi?id=1230015 |
| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2308807 | https://bugzilla.suse.com/show_bug.cgi?id=1230015 |
| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024083150-CVE-2024-44946-9cf1@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2308807 |
| debian |  | https://security-tracker.debian.org/tracker/CVE-2024-44946 |
| anolis |  | https://anas.openanolis.cn/cves/detail/CVE-2024-44946 |
| cve_search |  | https://git.kernel.org/stable/c/72da240aafb142630cf16adc803ccdacb3780849 |
| cve_search |  | https://git.kernel.org/stable/c/00425508f30baa5ab6449a1f478480ca7cffa6da |
| cve_search |  | https://git.kernel.org/stable/c/9c8d544ed619f704e2b70e63e08ab75630c2ea23 |
| cve_search |  | https://git.kernel.org/stable/c/807067bf014d4a3ae2cc55bd3de16f22a01eb580 |
| mageia |  | http://advisories.mageia.org/MGASA-2024-0309.html |

</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>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源  |
| ------- | -------- | ------- | -------- | --------- |
|  |  | https://git.kernel.org/stable/c/00425508f30baa5ab6449a1f478480ca7cffa6da |  | nvd |
|  |  | https://git.kernel.org/stable/c/72da240aafb142630cf16adc803ccdacb3780849 |  | nvd |
|  |  | https://git.kernel.org/stable/c/807067bf014d4a3ae2cc55bd3de16f22a01eb580 |  | nvd |
|  |  | https://git.kernel.org/stable/c/9c8d544ed619f704e2b70e63e08ab75630c2ea23 |  | nvd |

</details>

二、漏洞分析结构反馈
 影响性分析说明：
  Reserved.
 openEuler评分：
  5.5
 Vector：CVSS：3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
 受影响版本排查(受影响/不受影响)：
  1.openEuler-20.03-LTS-SP4(4.19.90):受影响
2.openEuler-22.03-LTS-SP3(5.10.0):受影响
3.openEuler-22.03-LTS-SP4(5.10.0):受影响
4.openEuler-24.03-LTS(6.6.0):受影响
5.master(6.6.0):不受影响
6.openEuler-24.03-LTS-Next(6.6.0):不受影响
7.openEuler-24.03-LTS-SP1(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-22.03-LTS-SP3(5.10.0):正常修复
2.openEuler-22.03-LTS-SP4(5.10.0):正常修复
3.openEuler-24.03-LTS(6.6.0):正常修复
4.openEuler-20.03-LTS-SP4(4.19.90):不修复-超出修复范围
5.master(6.6.0):不受影响-漏洞代码不能被攻击者触发
6.openEuler-24.03-LTS-Next(6.6.0):不受影响-漏洞代码不能被攻击者触发
7.openEuler-24.03-LTS-SP1(6.6.0):不受影响-漏洞代码不存在

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