CVE-2024-38596

一、漏洞信息
 漏洞编号：[CVE-2024-38596](https://nvd.nist.gov/vuln/detail/CVE-2024-38596)
 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 V2.0分值：
  BaseScore：0.0 None
  Vector：CVSS：2.0/
 漏洞简述：
  In the Linux kernel, the following vulnerability has been resolved:af_unix: Fix data races in unix_release_sock/unix_stream_sendmsgA data-race condition has been identified in af_unix. In one data path,the write function unix_release_sock() atomically writes tosk->sk_shutdown using WRITE_ONCE. However, on the reader side,unix_stream_sendmsg() does not read it atomically. Consequently, thisissue is causing the following KCSAN splat to occur:	BUG: KCSAN: data-race in unix_release_sock / unix_stream_sendmsg	write (marked) to 0xffff88867256ddbb of 1 bytes by task 7270 on cpu 28:	unix_release_sock (net/unix/af_unix.c:640)	unix_release (net/unix/af_unix.c:1050)	sock_close (net/socket.c:659 net/socket.c:1421)	__fput (fs/file_table.c:422)	__fput_sync (fs/file_table.c:508)	__se_sys_close (fs/open.c:1559 fs/open.c:1541)	__x64_sys_close (fs/open.c:1541)	x64_sys_call (arch/x86/entry/syscall_64.c:33)	do_syscall_64 (arch/x86/entry/common.c:?)	entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)	read to 0xffff88867256ddbb of 1 bytes by task 989 on cpu 14:	unix_stream_sendmsg (net/unix/af_unix.c:2273)	__sock_sendmsg (net/socket.c:730 net/socket.c:745)	____sys_sendmsg (net/socket.c:2584)	__sys_sendmmsg (net/socket.c:2638 net/socket.c:2724)	__x64_sys_sendmmsg (net/socket.c:2753 net/socket.c:2750 net/socket.c:2750)	x64_sys_call (arch/x86/entry/syscall_64.c:33)	do_syscall_64 (arch/x86/entry/common.c:?)	entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)	value changed: 0x01 -> 0x03The line numbers are related to commit dd5a440a31fa ( Linux 6.9-rc7 ).Commit e1d09c2c2f57 ( af_unix: Fix data races around sk->sk_shutdown. )addressed a comparable issue in the past regarding sk->sk_shutdown.However, it overlooked resolving this particular data path.This patch only offending unix_stream_sendmsg() function, since theother reads seem to be protected by unix_state_lock() as discussed in
 漏洞公开时间：2024-06-19 22:15:19
 漏洞创建时间：2024-06-19 23:52:42
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2024-38596
<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/0688d4e499bee3f2749bca27329bd128686230cb |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/4d51845d734a4c5d079e56e0916f936a55e15055 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/540bf24fba16b88c1b3b9353927204b4f1074e25 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/8299e4d778f664b31b67cf4cf3d5409de2ecb92c |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9aa8773abfa0e954136875b4cbf2df4cf638e8a5 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/a4c88072abcaca593cefe70f90e9d3707526e8f9 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/a52fa2addfcccc2c5a0217fd45562605088c018b |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/de6641d213373fbde9bbdd7c4b552254bc9f82fe |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/fca6072e1a7b1e709ada5604b951513b89b4bd0a |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html |  |
| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-38596 | https://bugzilla.suse.com/show_bug.cgi?id=1226846 |
| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-38596.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1226846 |
| suse_bugzilla | https://git.kernel.org/stable/c/fca6072e1a7b1e709ada5604b951513b89b4bd0a | https://bugzilla.suse.com/show_bug.cgi?id=1226846 |
| suse_bugzilla | https://git.kernel.org/stable/c/de6641d213373fbde9bbdd7c4b552254bc9f82fe | https://bugzilla.suse.com/show_bug.cgi?id=1226846 |
| suse_bugzilla | https://git.kernel.org/stable/c/4d51845d734a4c5d079e56e0916f936a55e15055 | https://bugzilla.suse.com/show_bug.cgi?id=1226846 |
| suse_bugzilla | https://git.kernel.org/stable/c/9aa8773abfa0e954136875b4cbf2df4cf638e8a5 | https://bugzilla.suse.com/show_bug.cgi?id=1226846 |
| suse_bugzilla | https://git.kernel.org/stable/c/8299e4d778f664b31b67cf4cf3d5409de2ecb92c | https://bugzilla.suse.com/show_bug.cgi?id=1226846 |
| suse_bugzilla | https://git.kernel.org/stable/c/0688d4e499bee3f2749bca27329bd128686230cb | https://bugzilla.suse.com/show_bug.cgi?id=1226846 |
| suse_bugzilla | https://git.kernel.org/stable/c/a4c88072abcaca593cefe70f90e9d3707526e8f9 | https://bugzilla.suse.com/show_bug.cgi?id=1226846 |
| suse_bugzilla | https://git.kernel.org/stable/c/a52fa2addfcccc2c5a0217fd45562605088c018b | https://bugzilla.suse.com/show_bug.cgi?id=1226846 |
| suse_bugzilla | https://git.kernel.org/stable/c/540bf24fba16b88c1b3b9353927204b4f1074e25 | https://bugzilla.suse.com/show_bug.cgi?id=1226846 |
| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-38596 | https://bugzilla.suse.com/show_bug.cgi?id=1226846 |
| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2293371 | https://bugzilla.suse.com/show_bug.cgi?id=1226846 |
| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024061956-CVE-2024-38596-f660@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2293371 |
| ubuntu | https://www.cve.org/CVERecord?id=CVE-2024-38596 | https://ubuntu.com/security/CVE-2024-38596 |
| ubuntu | https://git.kernel.org/linus/540bf24fba16b88c1b3b9353927204b4f1074e25 (6.10-rc1) | https://ubuntu.com/security/CVE-2024-38596 |
| ubuntu | https://git.kernel.org/stable/c/fca6072e1a7b1e709ada5604b951513b89b4bd0a | https://ubuntu.com/security/CVE-2024-38596 |
| ubuntu | https://git.kernel.org/stable/c/de6641d213373fbde9bbdd7c4b552254bc9f82fe | https://ubuntu.com/security/CVE-2024-38596 |
| ubuntu | https://git.kernel.org/stable/c/4d51845d734a4c5d079e56e0916f936a55e15055 | https://ubuntu.com/security/CVE-2024-38596 |
| ubuntu | https://git.kernel.org/stable/c/9aa8773abfa0e954136875b4cbf2df4cf638e8a5 | https://ubuntu.com/security/CVE-2024-38596 |
| ubuntu | https://git.kernel.org/stable/c/8299e4d778f664b31b67cf4cf3d5409de2ecb92c | https://ubuntu.com/security/CVE-2024-38596 |
| ubuntu | https://git.kernel.org/stable/c/0688d4e499bee3f2749bca27329bd128686230cb | https://ubuntu.com/security/CVE-2024-38596 |
| ubuntu | https://git.kernel.org/stable/c/a4c88072abcaca593cefe70f90e9d3707526e8f9 | https://ubuntu.com/security/CVE-2024-38596 |
| ubuntu | https://git.kernel.org/stable/c/a52fa2addfcccc2c5a0217fd45562605088c018b | https://ubuntu.com/security/CVE-2024-38596 |
| ubuntu | https://git.kernel.org/stable/c/540bf24fba16b88c1b3b9353927204b4f1074e25 | https://ubuntu.com/security/CVE-2024-38596 |
| ubuntu | https://nvd.nist.gov/vuln/detail/CVE-2024-38596 | https://ubuntu.com/security/CVE-2024-38596 |
| ubuntu | https://launchpad.net/bugs/cve/CVE-2024-38596 | https://ubuntu.com/security/CVE-2024-38596 |
| ubuntu | https://security-tracker.debian.org/tracker/CVE-2024-38596 | https://ubuntu.com/security/CVE-2024-38596 |
| debian |  | https://security-tracker.debian.org/tracker/CVE-2024-38596 |

</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  |
| ------- | -------- | ------- | -------- | --------- |
| linux |  | https://git.kernel.org/linus/540bf24fba16b88c1b3b9353927204b4f1074e25 | https://git.kernel.org/linus/1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 | ubuntu |

</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:af_unix: Fix data races in unix_release_sock/unix_stream_sendmsgA data-race condition has been identified in af_unix. In one data path,the write function unix_release_sock() atomically writes tosk->sk_shutdown using WRITE_ONCE. However, on the reader side,unix_stream_sendmsg() does not read it atomically. Consequently, thisissue is causing the following KCSAN splat to occur:BUG: KCSAN: data-race in unix_release_sock / unix_stream_sendmsgwrite (marked) to 0xffff88867256ddbb of 1 bytes by task 7270 on cpu 28:unix_release_sock (net/unix/af_unix.c:640)unix_release (net/unix/af_unix.c:1050)sock_close (net/socket.c:659 net/socket.c:1421)__fput (fs/file_table.c:422)__fput_sync (fs/file_table.c:508)__se_sys_close (fs/open.c:1559 fs/open.c:1541)__x64_sys_close (fs/open.c:1541)x64_sys_call (arch/x86/entry/syscall_64.c:33)do_syscall_64 (arch/x86/entry/common.c:?)entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)read to 0xffff88867256ddbb of 1 bytes by task 989 on cpu 14:unix_stream_sendmsg (net/unix/af_unix.c:2273)__sock_sendmsg (net/socket.c:730 net/socket.c:745)____sys_sendmsg (net/socket.c:2584)__sys_sendmmsg (net/socket.c:2638 net/socket.c:2724)__x64_sys_sendmmsg (net/socket.c:2753 net/socket.c:2750 net/socket.c:2750)x64_sys_call (arch/x86/entry/syscall_64.c:33)do_syscall_64 (arch/x86/entry/common.c:?)entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)value changed: 0x01 -> 0x03The line numbers are related to commit dd5a440a31fa ( Linux 6.9-rc7 ).Commit e1d09c2c2f57 ( af_unix: Fix data races around sk->sk_shutdown. )addressed a comparable issue in the past regarding sk->sk_shutdown.However, it overlooked resolving this particular data path.This patch only offending unix_stream_sendmsg() function, since theother reads seem to be protected by unix_state_lock() as discussed in 
 openEuler评分：
  2.5
 Vector：CVSS：2.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
 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-24.03-LTS(6.6.0):受影响
5.openEuler-22.03-LTS-SP4(5.10.0):不受影响
6.master(6.1.0):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(6.1.0):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

三、漏洞修复
安全公告链接：https://www.openeuler.org/zh/security/safety-bulletin/detail/?id=openEuler-SA-2024-1838

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