CVE-2022-49196

一、漏洞信息
 漏洞编号：[CVE-2022-49196](https://nvd.nist.gov/vuln/detail/CVE-2022-49196)
 漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)
 漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.19,6.1.8,6.4.0,6.6.0
 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:powerpc/pseries: Fix use after free in remove_phb_dynamic()In remove_phb_dynamic() we use &phb->io_resource, after we ve calleddevice_unregister(&host_bridge->dev). But the unregister may have freedphb, because pcibios_free_controller_deferred() is the release functionfor the host_bridge.If there are no outstanding references when we call device_unregister()then phb will be freed out from under us.This has gone mainly unnoticed, but with slub_debug and page_poisonenabled it can lead to a crash:  PID: 7574   TASK: c0000000d492cb80  CPU: 13  COMMAND:  drmgr    #0 [c0000000e4f075a0] crash_kexec at c00000000027d7dc   #1 [c0000000e4f075d0] oops_end at c000000000029608   #2 [c0000000e4f07650] __bad_page_fault at c0000000000904b4   #3 [c0000000e4f076c0] do_bad_slb_fault at c00000000009a5a8   #4 [c0000000e4f076f0] data_access_slb_common_virt at c000000000008b30   Data SLB Access [380] exception frame:   R0:  c000000000167250    R1:  c0000000e4f07a00    R2:  c000000002a46100   R3:  c000000002b39ce8    R4:  00000000000000c0    R5:  00000000000000a9   R6:  3894674d000000c0    R7:  0000000000000000    R8:  00000000000000ff   R9:  0000000000000100    R10: 6b6b6b6b6b6b6b6b    R11: 0000000000008000   R12: c00000000023da80    R13: c0000009ffd38b00    R14: 0000000000000000   R15: 000000011c87f0f0    R16: 0000000000000006    R17: 0000000000000003   R18: 0000000000000002    R19: 0000000000000004    R20: 0000000000000005   R21: 000000011c87ede8    R22: 000000011c87c5a8    R23: 000000011c87d3a0   R24: 0000000000000000    R25: 0000000000000001    R26: c0000000e4f07cc8   R27: c00000004d1cc400    R28: c0080000031d00e8    R29: c00000004d23d800   R30: c00000004d1d2400    R31: c00000004d1d2540   NIP: c000000000167258    MSR: 8000000000009033    OR3: c000000000e9f474   CTR: 0000000000000000    LR:  c000000000167250    XER: 0000000020040003   CCR: 0000000024088420    MQ:  0000000000000000    DAR: 6b6b6b6b6b6b6ba3   DSISR: c0000000e4f07920     Syscall Result: fffffffffffffff2   [NIP  : release_resource+56]   [LR   : release_resource+48]   #5 [c0000000e4f07a00] release_resource at c000000000167258  (unreliable)   #6 [c0000000e4f07a30] remove_phb_dynamic at c000000000105648   #7 [c0000000e4f07ab0] dlpar_remove_slot at c0080000031a09e8 [rpadlpar_io]   #8 [c0000000e4f07b50] remove_slot_store at c0080000031a0b9c [rpadlpar_io]   #9 [c0000000e4f07be0] kobj_attr_store at c000000000817d8c  #10 [c0000000e4f07c00] sysfs_kf_write at c00000000063e504  #11 [c0000000e4f07c20] kernfs_fop_write_iter at c00000000063d868  #12 [c0000000e4f07c70] new_sync_write at c00000000054339c  #13 [c0000000e4f07d10] vfs_write at c000000000546624  #14 [c0000000e4f07d60] ksys_write at c0000000005469f4  #15 [c0000000e4f07db0] system_call_exception at c000000000030840  #16 [c0000000e4f07e10] system_call_vectored_common at c00000000000c168To avoid it, we can take a reference to the host_bridge->dev until we redone using phb. Then when we drop the reference the phb will be freed.
 漏洞公开时间：2025-02-26 15:00:56
 漏洞创建时间：2025-02-26 14:55:10
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2022-49196
<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/33d39efb61a84e055ca2386157d39ebbdf6b7d31 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/403f9e0bc5535a0a5184d1352fa3a70e6ffacb6f |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/895ca4ae1f72e0a0160ab162723e59c9f265ec93 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/fe2640bd7a62f1f7c3f55fbda31084085075bc30 |  |
| suse_bugzilla | https://www.kernel.org | https://bugzilla.suse.com/show_bug.cgi?id=1238274 |
| suse_bugzilla | https://cve.org/CVERecord/?id=CVE-2022-49196 | https://bugzilla.suse.com/show_bug.cgi?id=1238274 |
| suse_bugzilla | https://git.kernel.org/stable/c/33d39efb61a84e055ca2386157d39ebbdf6b7d31 | https://bugzilla.suse.com/show_bug.cgi?id=1238274 |
| suse_bugzilla | https://git.kernel.org/stable/c/403f9e0bc5535a0a5184d1352fa3a70e6ffacb6f | https://bugzilla.suse.com/show_bug.cgi?id=1238274 |
| suse_bugzilla | https://git.kernel.org/stable/c/895ca4ae1f72e0a0160ab162723e59c9f265ec93 | https://bugzilla.suse.com/show_bug.cgi?id=1238274 |
| suse_bugzilla | https://git.kernel.org/stable/c/fe2640bd7a62f1f7c3f55fbda31084085075bc30 | https://bugzilla.suse.com/show_bug.cgi?id=1238274 |
| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-49196 | https://bugzilla.suse.com/show_bug.cgi?id=1238274 |
| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2022/CVE-2022-49196.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1238274 |
| suse_bugzilla | https://git.kernel.org/stable/c/33d39efb61a84e055ca2386157d39ebbdf6b7d31 | https://bugzilla.suse.com/show_bug.cgi?id=1238274 |
| suse_bugzilla | https://git.kernel.org/stable/c/403f9e0bc5535a0a5184d1352fa3a70e6ffacb6f | https://bugzilla.suse.com/show_bug.cgi?id=1238274 |
| suse_bugzilla | https://git.kernel.org/stable/c/895ca4ae1f72e0a0160ab162723e59c9f265ec93 | https://bugzilla.suse.com/show_bug.cgi?id=1238274 |
| suse_bugzilla | https://git.kernel.org/stable/c/fe2640bd7a62f1f7c3f55fbda31084085075bc30 | https://bugzilla.suse.com/show_bug.cgi?id=1238274 |
| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2348173 | https://bugzilla.suse.com/show_bug.cgi?id=1238274 |
| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2025022617-CVE-2022-49196-978c@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2348173 |
| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2025022617-CVE-2022-49196-978c@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2348173 |
| amazon_linux_explore | https://access.redhat.com/security/cve/CVE-2022-49196 | https://explore.alas.aws.amazon.com/CVE-2022-49196.html |
| amazon_linux_explore | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-49196 | https://explore.alas.aws.amazon.com/CVE-2022-49196.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/33d39efb61a84e055ca2386157d39ebbdf6b7d31 |  | nvd |
|  |  | https://git.kernel.org/stable/c/403f9e0bc5535a0a5184d1352fa3a70e6ffacb6f |  | nvd |
|  |  | https://git.kernel.org/stable/c/895ca4ae1f72e0a0160ab162723e59c9f265ec93 |  | nvd |
|  |  | https://git.kernel.org/stable/c/fe2640bd7a62f1f7c3f55fbda31084085075bc30 |  | nvd |

</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:powerpc/pseries: Fix use after free in remove_phb_dynamic()In remove_phb_dynamic() we use &phb->io_resource, after we ve calleddevice_unregister(&host_bridge->dev). But the unregister may have freedphb, because pcibios_free_controller_deferred() is the release functionfor the host_bridge.If there are no outstanding references when we call device_unregister()then phb will be freed out from under us.This has gone mainly unnoticed, but with slub_debug and page_poisonenabled it can lead to a crash:PID: 7574 TASK: c0000000d492cb80 CPU: 13 COMMAND:  drmgr #0 [c0000000e4f075a0] crash_kexec at c00000000027d7dc#1 [c0000000e4f075d0] oops_end at c000000000029608#2 [c0000000e4f07650] __bad_page_fault at c0000000000904b4#3 [c0000000e4f076c0] do_bad_slb_fault at c00000000009a5a8#4 [c0000000e4f076f0] data_access_slb_common_virt at c000000000008b30Data SLB Access [380] exception frame:R0: c000000000167250 R1: c0000000e4f07a00 R2: c000000002a46100R3: c000000002b39ce8 R4: 00000000000000c0 R5: 00000000000000a9R6: 3894674d000000c0 R7: 0000000000000000 R8: 00000000000000ffR9: 0000000000000100 R10: 6b6b6b6b6b6b6b6b R11: 0000000000008000R12: c00000000023da80 R13: c0000009ffd38b00 R14: 0000000000000000R15: 000000011c87f0f0 R16: 0000000000000006 R17: 0000000000000003R18: 0000000000000002 R19: 0000000000000004 R20: 0000000000000005R21: 000000011c87ede8 R22: 000000011c87c5a8 R23: 000000011c87d3a0R24: 0000000000000000 R25: 0000000000000001 R26: c0000000e4f07cc8R27: c00000004d1cc400 R28: c0080000031d00e8 R29: c00000004d23d800R30: c00000004d1d2400 R31: c00000004d1d2540NIP: c000000000167258 MSR: 8000000000009033 OR3: c000000000e9f474CTR: 0000000000000000 LR: c000000000167250 XER: 0000000020040003CCR: 0000000024088420 MQ: 0000000000000000 DAR: 6b6b6b6b6b6b6ba3DSISR: c0000000e4f07920 Syscall Result: fffffffffffffff2[NIP : release_resource+56][LR : release_resource+48]#5 [c0000000e4f07a00] release_resource at c000000000167258 (unreliable)#6 [c0000000e4f07a30] remove_phb_dynamic at c000000000105648#7 [c0000000e4f07ab0] dlpar_remove_slot at c0080000031a09e8 [rpadlpar_io]#8 [c0000000e4f07b50] remove_slot_store at c0080000031a0b9c [rpadlpar_io]#9 [c0000000e4f07be0] kobj_attr_store at c000000000817d8c#10 [c0000000e4f07c00] sysfs_kf_write at c00000000063e504#11 [c0000000e4f07c20] kernfs_fop_write_iter at c00000000063d868#12 [c0000000e4f07c70] new_sync_write at c00000000054339c#13 [c0000000e4f07d10] vfs_write at c000000000546624#14 [c0000000e4f07d60] ksys_write at c0000000005469f4#15 [c0000000e4f07db0] system_call_exception at c000000000030840#16 [c0000000e4f07e10] system_call_vectored_common at c00000000000c168To avoid it, we can take a reference to the host_bridge->dev until we redone using phb. Then when we drop the reference the phb will be freed.
 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-SP3(5.10.0):不受影响
3.openEuler-22.03-LTS-SP4(5.10.0):不受影响
4.master(6.12.33):不受影响
5.openEuler-24.03-LTS(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
8.openEuler-24.03-LTS-SP2(6.6.0):不受影响
9.openEuler-24.03-LTS-SP3(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-SP3(5.10.0):否
3.master(6.12.33):否
4.openEuler-24.03-LTS(6.6.0):否
5.openEuler-24.03-LTS-Next(6.6.0):否
6.openEuler-22.03-LTS-SP4(5.10.0):否
7.openEuler-24.03-LTS-SP1(6.6.0):否
8.openEuler-24.03-LTS-SP2(6.6.0):否
9.openEuler-24.03-LTS-SP3(6.6.0):否

原因说明：
  1.openEuler-22.03-LTS-SP3(5.10.0):不受影响-组件不存在
2.openEuler-22.03-LTS-SP4(5.10.0):不受影响-组件不存在
3.openEuler-20.03-LTS-SP4(4.19.90):不修复-超出修复范围
4.master(6.12.33):不受影响-漏洞代码不能被攻击者触发
5.openEuler-24.03-LTS-Next(6.6.0):不受影响-漏洞代码不能被攻击者触发
6.openEuler-24.03-LTS(6.6.0):不受影响-漏洞代码不存在
7.openEuler-24.03-LTS-SP1(6.6.0):不受影响-漏洞代码不存在
8.openEuler-24.03-LTS-SP2(6.6.0):不受影响-漏洞代码不存在
9.openEuler-24.03-LTS-SP3(6.6.0):不受影响-漏洞代码不存在

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