CVE-2024-49950

一、漏洞信息
 漏洞编号：[CVE-2024-49950](https://nvd.nist.gov/vuln/detail/CVE-2024-49950)
 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.x分值：
  BaseScore：7.8 High
  Vector：CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
 漏洞简述：
  In the Linux kernel, the following vulnerability has been resolved:Bluetooth: L2CAP: Fix uaf in l2cap_connect[Syzbot reported]BUG: KASAN: slab-use-after-free in l2cap_connect.constprop.0+0x10d8/0x1270 net/bluetooth/l2cap_core.c:3949Read of size 8 at addr ffff8880241e9800 by task kworker/u9:0/54CPU: 0 UID: 0 PID: 54 Comm: kworker/u9:0 Not tainted 6.11.0-rc6-syzkaller-00268-g788220eee30d #0Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024Workqueue: hci2 hci_rx_workCall Trace: <TASK> __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 l2cap_connect.constprop.0+0x10d8/0x1270 net/bluetooth/l2cap_core.c:3949 l2cap_connect_req net/bluetooth/l2cap_core.c:4080 [inline] l2cap_bredr_sig_cmd net/bluetooth/l2cap_core.c:4772 [inline] l2cap_sig_channel net/bluetooth/l2cap_core.c:5543 [inline] l2cap_recv_frame+0xf0b/0x8eb0 net/bluetooth/l2cap_core.c:6825 l2cap_recv_acldata+0x9b4/0xb70 net/bluetooth/l2cap_core.c:7514 hci_acldata_packet net/bluetooth/hci_core.c:3791 [inline] hci_rx_work+0xaab/0x1610 net/bluetooth/hci_core.c:4028 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xed0 kernel/workqueue.c:3389 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244...Freed by task 5245: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240 __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2256 [inline] slab_free mm/slub.c:4477 [inline] kfree+0x12a/0x3b0 mm/slub.c:4598 l2cap_conn_free net/bluetooth/l2cap_core.c:1810 [inline] kref_put include/linux/kref.h:65 [inline] l2cap_conn_put net/bluetooth/l2cap_core.c:1822 [inline] l2cap_conn_del+0x59d/0x730 net/bluetooth/l2cap_core.c:1802 l2cap_connect_cfm+0x9e6/0xf80 net/bluetooth/l2cap_core.c:7241 hci_connect_cfm include/net/bluetooth/hci_core.h:1960 [inline] hci_conn_failed+0x1c3/0x370 net/bluetooth/hci_conn.c:1265 hci_abort_conn_sync+0x75a/0xb50 net/bluetooth/hci_sync.c:5583 abort_conn_sync+0x197/0x360 net/bluetooth/hci_conn.c:2917 hci_cmd_sync_work+0x1a4/0x410 net/bluetooth/hci_sync.c:328 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xed0 kernel/workqueue.c:3389 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 漏洞公开时间：2024-10-22 02:15:16
 漏洞创建时间：2024-10-22 03:00:24
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2024-49950
<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/333b4fd11e89b29c84c269123f871883a30be586 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/686e05c9dbd68766c6bda5f31f7e077f36a7fb29 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/78d30ce16fdf9c301bcd8b83ce613cea079cea83 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/a1c6174e23df10b8e5770e82d63bc6e2118a3dc7 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/b22346eec479a30bfa4a02ad2c551b54809694d0 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/b90907696c30172b809aa3dd2f0caffae761e4c6 |  |
| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-49950 | https://bugzilla.suse.com/show_bug.cgi?id=1232159 |
| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-49950 | https://bugzilla.suse.com/show_bug.cgi?id=1232159 |
| suse_bugzilla | https://git.kernel.org/stable/c/333b4fd11e89b29c84c269123f871883a30be586 | https://bugzilla.suse.com/show_bug.cgi?id=1232159 |
| suse_bugzilla | https://git.kernel.org/stable/c/78d30ce16fdf9c301bcd8b83ce613cea079cea83 | https://bugzilla.suse.com/show_bug.cgi?id=1232159 |
| suse_bugzilla | https://git.kernel.org/stable/c/a1c6174e23df10b8e5770e82d63bc6e2118a3dc7 | https://bugzilla.suse.com/show_bug.cgi?id=1232159 |
| suse_bugzilla | https://git.kernel.org/stable/c/b90907696c30172b809aa3dd2f0caffae761e4c6 | https://bugzilla.suse.com/show_bug.cgi?id=1232159 |
| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-49950.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1232159 |
| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2320459 | https://bugzilla.suse.com/show_bug.cgi?id=1232159 |
| debian |  | https://security-tracker.debian.org/tracker/CVE-2024-49950 |
| anolis |  | https://anas.openanolis.cn/cves/detail/CVE-2024-49950 |
| mageia |  | http://advisories.mageia.org/MGASA-2024-0345.html |
| osv | https://git.kernel.org/stable/c/333b4fd11e89b29c84c269123f871883a30be586 | https://osv.dev/vulnerability/CVE-2024-49950 |
| osv | https://git.kernel.org/stable/c/78d30ce16fdf9c301bcd8b83ce613cea079cea83 | https://osv.dev/vulnerability/CVE-2024-49950 |
| osv | https://git.kernel.org/stable/c/a1c6174e23df10b8e5770e82d63bc6e2118a3dc7 | https://osv.dev/vulnerability/CVE-2024-49950 |
| osv | https://git.kernel.org/stable/c/b90907696c30172b809aa3dd2f0caffae761e4c6 | https://osv.dev/vulnerability/CVE-2024-49950 |
| osv | https://git.kernel.org/stable/c/b22346eec479a30bfa4a02ad2c551b54809694d0 | https://osv.dev/vulnerability/CVE-2024-49950 |
| osv | https://security-tracker.debian.org/tracker/CVE-2024-49950 | https://osv.dev/vulnerability/CVE-2024-49950 |

</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/333b4fd11e89b29c84c269123f871883a30be586 |  | nvd |
|  |  | https://git.kernel.org/stable/c/78d30ce16fdf9c301bcd8b83ce613cea079cea83 |  | nvd |
|  |  | https://git.kernel.org/stable/c/a1c6174e23df10b8e5770e82d63bc6e2118a3dc7 |  | nvd |
|  |  | https://git.kernel.org/stable/c/b90907696c30172b809aa3dd2f0caffae761e4c6 |  | nvd |
| linux_kernel | 6.6.55 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=b90907696c30Issue | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=7b064edae38d | linuxkernelcves |
| linux_kernel | 6.10.14 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=78d30ce16fdfIssue | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=7b064edae38d | linuxkernelcves |
| linux_kernel | 6.11.3 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=a1c6174e23dfIssue | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=7b064edae38d | linuxkernelcves |
| linux_kernel | 6.12-rc2 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=333b4fd11e89Please | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=7b064edae38d | linuxkernelcves |

</details>

二、漏洞分析结构反馈
 影响性分析说明：
    In the Linux kernel, the following vulnerability has been resolved:Bluetooth: L2CAP: Fix uaf in l2cap_connect[Syzbot reported]BUG: KASAN: slab-use-after-free in l2cap_connect.constprop.0+0x10d8/0x1270 net/bluetooth/l2cap_core.c:3949Read of size 8 at addr ffff8880241e9800 by task kworker/u9:0/54CPU: 0 UID: 0 PID: 54 Comm: kworker/u9:0 Not tainted 6.11.0-rc6-syzkaller-00268-g788220eee30d #0Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024Workqueue: hci2 hci_rx_workCall Trace: <TASK> __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 l2cap_connect.constprop.0+0x10d8/0x1270 net/bluetooth/l2cap_core.c:3949 l2cap_connect_req net/bluetooth/l2cap_core.c:4080 [inline] l2cap_bredr_sig_cmd net/bluetooth/l2cap_core.c:4772 [inline] l2cap_sig_channel net/bluetooth/l2cap_core.c:5543 [inline] l2cap_recv_frame+0xf0b/0x8eb0 net/bluetooth/l2cap_core.c:6825 l2cap_recv_acldata+0x9b4/0xb70 net/bluetooth/l2cap_core.c:7514 hci_acldata_packet net/bluetooth/hci_core.c:3791 [inline] hci_rx_work+0xaab/0x1610 net/bluetooth/hci_core.c:4028 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xed0 kernel/workqueue.c:3389 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244...Freed by task 5245: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240 __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2256 [inline] slab_free mm/slub.c:4477 [inline] kfree+0x12a/0x3b0 mm/slub.c:4598 l2cap_conn_free net/bluetooth/l2cap_core.c:1810 [inline] kref_put include/linux/kref.h:65 [inline] l2cap_conn_put net/bluetooth/l2cap_core.c:1822 [inline] l2cap_conn_del+0x59d/0x730 net/bluetooth/l2cap_core.c:1802 l2cap_connect_cfm+0x9e6/0xf80 net/bluetooth/l2cap_core.c:7241 hci_connect_cfm include/net/bluetooth/hci_core.h:1960 [inline] hci_conn_failed+0x1c3/0x370 net/bluetooth/hci_conn.c:1265 hci_abort_conn_sync+0x75a/0xb50 net/bluetooth/hci_sync.c:5583 abort_conn_sync+0x197/0x360 net/bluetooth/hci_conn.c:2917 hci_cmd_sync_work+0x1a4/0x410 net/bluetooth/hci_sync.c:328 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xed0 kernel/workqueue.c:3389 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 
 openEuler评分：
  7.8
 Vector：CVSS:3.1/AV:L/AC:L/PR:L/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-20.03-LTS-SP4(4.19.90):受影响
2.openEuler-22.03-LTS-SP1(5.10.0):受影响
3.openEuler-22.03-LTS-SP3(5.10.0):受影响
4.openEuler-22.03-LTS-SP4(5.10.0):受影响
5.openEuler-24.03-LTS(6.6.0):受影响
6.master(6.12.33):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(6.12.33):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.master(6.12.33):
9.openEuler-20.03-LTS-SP4(4.19.90):
10.openEuler-22.03-LTS-SP1(5.10.0):
11.openEuler-22.03-LTS-SP3(5.10.0):
12.openEuler-22.03-LTS-SP4(5.10.0):
13.openEuler-24.03-LTS(6.6.0):
14.openEuler-24.03-LTS-Next(6.6.0):

原因说明：
  1.master(6.12.33):
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP3(5.10.0):
4.openEuler-22.03-LTS-SP4(5.10.0):
5.openEuler-24.03-LTS(6.6.0):
6.openEuler-24.03-LTS-Next(6.6.0):
7.openEuler-24.03-LTS-SP1(6.6.0):
8.openEuler-24.03-LTS-SP2(6.6.0):
9.openEuler-24.03-LTS-SP3(6.6.0):

三、漏洞修复
安全公告链接：https://www.openeuler.org/zh/security/safety-bulletin/detail/?id=openEuler-SA-2025-2802

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