CVE-2022-49623— Linux kernel 安全漏洞
可能的 ATT&CK 技术 1AI
T1068 · Exploitation for Privilege Escalation影响版本矩阵 8
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | eac1e731b59ee3b5f5e641a7765c7ed41ed26226< 10f2cd373e65bcd3be8f3cdc71c330c25763dfd8 | affected |
eac1e731b59ee3b5f5e641a7765c7ed41ed26226< 99d1c36bddd93919072b5a51a89297bbb5ad6a6f | affected | ||
eac1e731b59ee3b5f5e641a7765c7ed41ed26226< 19fc5bb93c6bbdce8292b4d7eed04e2fa118d2fe | affected | ||
4.14 | affected | ||
< 4.14 | unaffected | ||
5.15.56≤ 5.15.* | unaffected | ||
5.18.13≤ 5.18.* | unaffected | ||
5.19≤ * | unaffected |
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一、 漏洞 CVE-2022-49623 基础信息
漏洞信息
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Vulnerability Title
powerpc/xive/spapr: correct bitmap allocation size
来源: 美国国家漏洞数据库 NVD
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: powerpc/xive/spapr: correct bitmap allocation size kasan detects access beyond the end of the xibm->bitmap allocation: BUG: KASAN: slab-out-of-bounds in _find_first_zero_bit+0x40/0x140 Read of size 8 at addr c00000001d1d0118 by task swapper/0/1 CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.19.0-rc2-00001-g90df023b36dd #28 Call Trace: [c00000001d98f770] [c0000000012baab8] dump_stack_lvl+0xac/0x108 (unreliable) [c00000001d98f7b0] [c00000000068faac] print_report+0x37c/0x710 [c00000001d98f880] [c0000000006902c0] kasan_report+0x110/0x354 [c00000001d98f950] [c000000000692324] __asan_load8+0xa4/0xe0 [c00000001d98f970] [c0000000011c6ed0] _find_first_zero_bit+0x40/0x140 [c00000001d98f9b0] [c0000000000dbfbc] xive_spapr_get_ipi+0xcc/0x260 [c00000001d98fa70] [c0000000000d6d28] xive_setup_cpu_ipi+0x1e8/0x450 [c00000001d98fb30] [c000000004032a20] pSeries_smp_probe+0x5c/0x118 [c00000001d98fb60] [c000000004018b44] smp_prepare_cpus+0x944/0x9ac [c00000001d98fc90] [c000000004009f9c] kernel_init_freeable+0x2d4/0x640 [c00000001d98fd90] [c0000000000131e8] kernel_init+0x28/0x1d0 [c00000001d98fe10] [c00000000000cd54] ret_from_kernel_thread+0x5c/0x64 Allocated by task 0: kasan_save_stack+0x34/0x70 __kasan_kmalloc+0xb4/0xf0 __kmalloc+0x268/0x540 xive_spapr_init+0x4d0/0x77c pseries_init_irq+0x40/0x27c init_IRQ+0x44/0x84 start_kernel+0x2a4/0x538 start_here_common+0x1c/0x20 The buggy address belongs to the object at c00000001d1d0118 which belongs to the cache kmalloc-8 of size 8 The buggy address is located 0 bytes inside of 8-byte region [c00000001d1d0118, c00000001d1d0120) The buggy address belongs to the physical page: page:c00c000000074740 refcount:1 mapcount:0 mapping:0000000000000000 index:0xc00000001d1d0558 pfn:0x1d1d flags: 0x7ffff000000200(slab|node=0|zone=0|lastcpupid=0x7ffff) raw: 007ffff000000200 c00000001d0003c8 c00000001d0003c8 c00000001d010480 raw: c00000001d1d0558 0000000001e1000a 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: c00000001d1d0000: fc 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc c00000001d1d0080: fc fc 00 fc fc fc fc fc fc fc fc fc fc fc fc fc >c00000001d1d0100: fc fc fc 02 fc fc fc fc fc fc fc fc fc fc fc fc ^ c00000001d1d0180: fc fc fc fc 04 fc fc fc fc fc fc fc fc fc fc fc c00000001d1d0200: fc fc fc fc fc 04 fc fc fc fc fc fc fc fc fc fc This happens because the allocation uses the wrong unit (bits) when it should pass (BITS_TO_LONGS(count) * sizeof(long)) or equivalent. With small numbers of bits, the allocated object can be smaller than sizeof(long), which results in invalid accesses. Use bitmap_zalloc() to allocate and initialize the irq bitmap, paired with bitmap_free() for consistency.
来源: 美国国家漏洞数据库 NVD
CVSS Information
N/A
来源: 美国国家漏洞数据库 NVD
Vulnerability Type
N/A
来源: 美国国家漏洞数据库 NVD
Vulnerability Title
Linux kernel 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于xive_spapr_get_ipi函数访问超出xibm->bitmap分配范围，导致越界读取。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2022-49623 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2022-49623 补丁与修复 (3)
同批安全公告 · Linux · 2025-02-26 · 共 706 条
| CVE-2022-49496 | Linux kernel 安全漏洞 | |
| CVE-2022-49487 | Linux kernel 安全漏洞 | |
| CVE-2022-49486 | Linux kernel 安全漏洞 | |
| CVE-2022-49488 | Linux kernel 安全漏洞 | |
| CVE-2022-49489 | Linux kernel 安全漏洞 | |
| CVE-2022-49490 | Linux kernel 安全漏洞 | |
| CVE-2022-49491 | Linux kernel 安全漏洞 | |
| CVE-2022-49492 | Linux kernel 安全漏洞 | |
| CVE-2022-49493 | Linux kernel 安全漏洞 | |
| CVE-2022-49494 | Linux kernel 安全漏洞 | |
| CVE-2022-49495 | Linux kernel 安全漏洞 | |
| CVE-2022-49497 | Linux kernel 安全漏洞 | |
| CVE-2022-49503 | Linux kernel 安全漏洞 | |
| CVE-2022-49508 | Linux kernel 安全漏洞 | |
| CVE-2022-49506 | Linux kernel 安全漏洞 | |
| CVE-2022-49504 | Linux kernel 安全漏洞 | |
| CVE-2022-49505 | Linux kernel 安全漏洞 | |
| CVE-2022-49502 | Linux kernel 安全漏洞 | |
| CVE-2022-49499 | Linux kernel 安全漏洞 | |
| CVE-2022-49498 | Linux kernel 安全漏洞 |
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IV. Related Vulnerabilities
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