CVE-2024-26635

一、漏洞信息
 漏洞编号：[CVE-2024-26635](https://nvd.nist.gov/vuln/detail/CVE-2024-26635)
 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
 CVSS V2.0分值：
  BaseScore：0.0 Low
  Vector：CVSS：2.0/
 漏洞简述：
  In the Linux kernel, the following vulnerability has been resolved:llc: Drop support for ETH_P_TR_802_2.syzbot reported an uninit-value bug below. [0]llc supports ETH_P_802_2 (0x0004) and used to support ETH_P_TR_802_2(0x0011), and syzbot abused the latter to trigger the bug.  write$tun(r0, &(0x7f0000000040)={@val={0x0, 0x11}, @val, @mpls={[], @llc={@snap={0xaa, 0x1,  ) ,  90e5dd }}}}, 0x16)llc_conn_handler() initialises local variables {saddr,daddr}.macbased on skb in llc_pdu_decode_sa()/llc_pdu_decode_da() and passesthem to __llc_lookup().However, the initialisation is done only when skb->protocol ishtons(ETH_P_802_2), otherwise, __llc_lookup_established() and__llc_lookup_listener() will read garbage.The missing initialisation existed prior to commit 211ed865108e( net: delete all instances of special processing for token ring ).It removed the part to kick out the token ring stuff but forgot toclose the door allowing ETH_P_TR_802_2 packets to sneak into llc_rcv().Let s remove llc_tr_packet_type and complete the deprecation.[0]:BUG: KMSAN: uninit-value in __llc_lookup_established+0xe9d/0xf90 __llc_lookup_established+0xe9d/0xf90 __llc_lookup net/llc/llc_conn.c:611 [inline] llc_conn_handler+0x4bd/0x1360 net/llc/llc_conn.c:791 llc_rcv+0xfbb/0x14a0 net/llc/llc_input.c:206 __netif_receive_skb_one_core net/core/dev.c:5527 [inline] __netif_receive_skb+0x1a6/0x5a0 net/core/dev.c:5641 netif_receive_skb_internal net/core/dev.c:5727 [inline] netif_receive_skb+0x58/0x660 net/core/dev.c:5786 tun_rx_batched+0x3ee/0x980 drivers/net/tun.c:1555 tun_get_user+0x53af/0x66d0 drivers/net/tun.c:2002 tun_chr_write_iter+0x3af/0x5d0 drivers/net/tun.c:2048 call_write_iter include/linux/fs.h:2020 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x8ef/0x1490 fs/read_write.c:584 ksys_write+0x20f/0x4c0 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __x64_sys_write+0x93/0xd0 fs/read_write.c:646 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6bLocal variable daddr created at: llc_conn_handler+0x53/0x1360 net/llc/llc_conn.c:783 llc_rcv+0xfbb/0x14a0 net/llc/llc_input.c:206CPU: 1 PID: 5004 Comm: syz-executor994 Not tainted 6.6.0-syzkaller-14500-g1c41041124bd #0Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
 漏洞公开时间：2024-03-18 19:15:10
 漏洞创建时间：2024-03-18 19:59:15
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2024-26635
<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/165ad1e22779685c3ed3dd349c6c4c632309cc62 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/660c3053d992b68fee893a0e9ec9159228cffdc6 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9ccdef19cf9497c2803b005369668feb91cacdfd |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/b8e8838f82f332ae80c643dbb1ca4418d0628097 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/c0fe2fe7a5a291dfcf6dc64301732c8d3dc6a828 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/df57fc2f2abf548aa889a36ab0bdcc94a75399dc |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/e3f9bed9bee261e3347131764e42aeedf1ffea61 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/f1f34a515fb1e25e85dee94f781e7869ae351fb8 |  |
| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26635 | https://bugzilla.suse.com/show_bug.cgi?id=1221656 |
| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-26635 | https://bugzilla.suse.com/show_bug.cgi?id=1221656 |
| suse_bugzilla | https://git.kernel.org/stable/c/165ad1e22779685c3ed3dd349c6c4c632309cc62 | https://bugzilla.suse.com/show_bug.cgi?id=1221656 |
| suse_bugzilla | https://git.kernel.org/stable/c/660c3053d992b68fee893a0e9ec9159228cffdc6 | https://bugzilla.suse.com/show_bug.cgi?id=1221656 |
| suse_bugzilla | https://git.kernel.org/stable/c/9ccdef19cf9497c2803b005369668feb91cacdfd | https://bugzilla.suse.com/show_bug.cgi?id=1221656 |
| suse_bugzilla | https://git.kernel.org/stable/c/b8e8838f82f332ae80c643dbb1ca4418d0628097 | https://bugzilla.suse.com/show_bug.cgi?id=1221656 |
| suse_bugzilla | https://git.kernel.org/stable/c/c0fe2fe7a5a291dfcf6dc64301732c8d3dc6a828 | https://bugzilla.suse.com/show_bug.cgi?id=1221656 |
| suse_bugzilla | https://git.kernel.org/stable/c/df57fc2f2abf548aa889a36ab0bdcc94a75399dc | https://bugzilla.suse.com/show_bug.cgi?id=1221656 |
| suse_bugzilla | https://git.kernel.org/stable/c/e3f9bed9bee261e3347131764e42aeedf1ffea61 | https://bugzilla.suse.com/show_bug.cgi?id=1221656 |
| suse_bugzilla | https://git.kernel.org/stable/c/f1f34a515fb1e25e85dee94f781e7869ae351fb8 | https://bugzilla.suse.com/show_bug.cgi?id=1221656 |
| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2270113 | https://bugzilla.suse.com/show_bug.cgi?id=1221656 |
| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/20240318101458.2835626-13-lee@kernel.org/T | https://bugzilla.redhat.com/show_bug.cgi?id=2270113 |
| ubuntu | https://git.kernel.org/linus/e3f9bed9bee261e3347131764e42aeedf1ffea61 (6.8-rc2) | https://ubuntu.com/security/CVE-2024-26635 |
| ubuntu | https://git.kernel.org/stable/c/165ad1e22779685c3ed3dd349c6c4c632309cc62 | https://ubuntu.com/security/CVE-2024-26635 |
| ubuntu | https://git.kernel.org/stable/c/b8e8838f82f332ae80c643dbb1ca4418d0628097 | https://ubuntu.com/security/CVE-2024-26635 |
| ubuntu | https://git.kernel.org/stable/c/9ccdef19cf9497c2803b005369668feb91cacdfd | https://ubuntu.com/security/CVE-2024-26635 |
| ubuntu | https://git.kernel.org/stable/c/c0fe2fe7a5a291dfcf6dc64301732c8d3dc6a828 | https://ubuntu.com/security/CVE-2024-26635 |
| ubuntu | https://git.kernel.org/stable/c/660c3053d992b68fee893a0e9ec9159228cffdc6 | https://ubuntu.com/security/CVE-2024-26635 |
| ubuntu | https://git.kernel.org/stable/c/f1f34a515fb1e25e85dee94f781e7869ae351fb8 | https://ubuntu.com/security/CVE-2024-26635 |
| ubuntu | https://git.kernel.org/stable/c/df57fc2f2abf548aa889a36ab0bdcc94a75399dc | https://ubuntu.com/security/CVE-2024-26635 |
| ubuntu | https://git.kernel.org/stable/c/e3f9bed9bee261e3347131764e42aeedf1ffea61 | https://ubuntu.com/security/CVE-2024-26635 |
| ubuntu | https://www.cve.org/CVERecord?id=CVE-2024-26635 | https://ubuntu.com/security/CVE-2024-26635 |
| ubuntu | https://ubuntu.com/security/notices/USN-6765-1 | https://ubuntu.com/security/CVE-2024-26635 |
| ubuntu | https://ubuntu.com/security/notices/USN-6766-1 | https://ubuntu.com/security/CVE-2024-26635 |
| ubuntu | https://ubuntu.com/security/notices/USN-6767-1 | https://ubuntu.com/security/CVE-2024-26635 |
| ubuntu | https://ubuntu.com/security/notices/USN-6767-2 | https://ubuntu.com/security/CVE-2024-26635 |
| ubuntu | https://ubuntu.com/security/notices/USN-6766-2 | https://ubuntu.com/security/CVE-2024-26635 |
| ubuntu | https://ubuntu.com/security/notices/USN-6774-1 | https://ubuntu.com/security/CVE-2024-26635 |
| ubuntu | https://ubuntu.com/security/notices/USN-6777-1 | https://ubuntu.com/security/CVE-2024-26635 |
| ubuntu | https://ubuntu.com/security/notices/USN-6778-1 | https://ubuntu.com/security/CVE-2024-26635 |
| ubuntu | https://nvd.nist.gov/vuln/detail/CVE-2024-26635 | https://ubuntu.com/security/CVE-2024-26635 |
| ubuntu | https://launchpad.net/bugs/cve/CVE-2024-26635 | https://ubuntu.com/security/CVE-2024-26635 |
| ubuntu | https://security-tracker.debian.org/tracker/CVE-2024-26635 | https://ubuntu.com/security/CVE-2024-26635 |
| debian |  | https://security-tracker.debian.org/tracker/CVE-2024-26635 |
| cve_search |  | https://git.kernel.org/stable/c/165ad1e22779685c3ed3dd349c6c4c632309cc62 |
| cve_search |  | https://git.kernel.org/stable/c/b8e8838f82f332ae80c643dbb1ca4418d0628097 |
| cve_search |  | https://git.kernel.org/stable/c/9ccdef19cf9497c2803b005369668feb91cacdfd |
| cve_search |  | https://git.kernel.org/stable/c/c0fe2fe7a5a291dfcf6dc64301732c8d3dc6a828 |
| cve_search |  | https://git.kernel.org/stable/c/660c3053d992b68fee893a0e9ec9159228cffdc6 |
| cve_search |  | https://git.kernel.org/stable/c/f1f34a515fb1e25e85dee94f781e7869ae351fb8 |
| cve_search |  | https://git.kernel.org/stable/c/df57fc2f2abf548aa889a36ab0bdcc94a75399dc |
| cve_search |  | https://git.kernel.org/stable/c/e3f9bed9bee261e3347131764e42aeedf1ffea61 |
| ubuntu | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-26635 | https://ubuntu.com/security/CVE-2024-26635 |

</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/e3f9bed9bee261e3347131764e42aeedf1ffea61 | https://git.kernel.org/linus/211ed865108e24697b44bee5daac502ee6bdd4a4 | 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:llc: Drop support for ETH_P_TR_802_2.syzbot reported an uninit-value bug below. [0]llc supports ETH_P_802_2 (0x0004) and used to support ETH_P_TR_802_2(0x0011), and syzbot abused the latter to trigger the bug.  write$tun(r0, &(0x7f0000000040)={@val={0x0, 0x11}, @val, @mpls={[], @llc={@snap={0xaa, 0x1,  ) ,  90e5dd }}}}, 0x16)llc_conn_handler() initialises local variables {saddr,daddr}.macbased on skb in llc_pdu_decode_sa()/llc_pdu_decode_da() and passesthem to __llc_lookup().However, the initialisation is done only when skb->protocol ishtons(ETH_P_802_2), otherwise, __llc_lookup_established() and__llc_lookup_listener() will read garbage.The missing initialisation existed prior to commit 211ed865108e( net: delete all instances of special processing for token ring ).It removed the part to kick out the token ring stuff but forgot toclose the door allowing ETH_P_TR_802_2 packets to sneak into llc_rcv().Let s remove llc_tr_packet_type and complete the deprecation.[0]:BUG: KMSAN: uninit-value in __llc_lookup_established+0xe9d/0xf90 __llc_lookup_established+0xe9d/0xf90 __llc_lookup net/llc/llc_conn.c:611 [inline] llc_conn_handler+0x4bd/0x1360 net/llc/llc_conn.c:791 llc_rcv+0xfbb/0x14a0 net/llc/llc_input.c:206 __netif_receive_skb_one_core net/core/dev.c:5527 [inline] __netif_receive_skb+0x1a6/0x5a0 net/core/dev.c:5641 netif_receive_skb_internal net/core/dev.c:5727 [inline] netif_receive_skb+0x58/0x660 net/core/dev.c:5786 tun_rx_batched+0x3ee/0x980 drivers/net/tun.c:1555 tun_get_user+0x53af/0x66d0 drivers/net/tun.c:2002 tun_chr_write_iter+0x3af/0x5d0 drivers/net/tun.c:2048 call_write_iter include/linux/fs.h:2020 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x8ef/0x1490 fs/read_write.c:584 ksys_write+0x20f/0x4c0 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __x64_sys_write+0x93/0xd0 fs/read_write.c:646 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6bLocal variable daddr created at: llc_conn_handler+0x53/0x1360 net/llc/llc_conn.c:783 llc_rcv+0xfbb/0x14a0 net/llc/llc_input.c:206CPU: 1 PID: 5004 Comm: syz-executor994 Not tainted 6.6.0-syzkaller-14500-g1c41041124bd #0Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023  
 openEuler评分：
  6.1
 Vector：CVSS：2.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
 受影响版本排查(受影响/不受影响)：
  1.openEuler-20.03-LTS-SP1(4.19.90):受影响
2.openEuler-20.03-LTS-SP4(4.19.90):受影响
3.openEuler-22.03-LTS(5.10.0):受影响
4.openEuler-22.03-LTS-SP1(5.10.0):受影响
5.openEuler-22.03-LTS-SP2(5.10.0):受影响
6.openEuler-22.03-LTS-SP3(5.10.0):受影响
7.master(6.1.0):不受影响
8.openEuler-22.03-LTS-Next(5.10.0):不受影响
9.openEuler-24.03-LTS:不受影响
10.openEuler-24.03-LTS-Next:不受影响

修复是否涉及abi变化(是/否)：
  1.openEuler-20.03-LTS-SP1(4.19.90):否
2.openEuler-20.03-LTS-SP4(4.19.90):否
3.openEuler-22.03-LTS(5.10.0):否
4.openEuler-22.03-LTS-SP1(5.10.0):否
5.openEuler-22.03-LTS-SP2(5.10.0):否
6.openEuler-22.03-LTS-SP3(5.10.0):否
7.master(6.1.0):否
8.openEuler-22.03-LTS-Next(5.10.0):否
9.openEuler-24.03-LTS:否
10.openEuler-24.03-LTS-Next:否

三、漏洞修复
安全公告链接：https://www.openeuler.org/zh/security/safety-bulletin/detail/?id=openEuler-SA-2024-1649

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