CVE-2022-49872— Linux kernel 安全漏洞
一分钟漏洞结论
影响对象
Linux Linux
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
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，该漏洞源于网络GSO驱动中对混合头分配类型的frag_list处理不当，可能导致内核崩溃。
可能的 ATT&CK 技术 1 AI
T1059 · Command and Scripting Interpreter影响版本矩阵 23
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 162a5a8c3aff15c449e6b38355cdf80ab4f77a5a< 5876b7f249a1ecbbcc8e35072c3828d6526d1c3a |
affected |
55fb612bef7fd237fb70068e2b6ff1cd1543a8ef< 0a9f56e525ea871d3950b90076912f5c7494f00f |
affected | ||
821302dd0c51d29269ef73a595bdff294419e2cd< bd5362e58721e4d0d1a37796593bd6e51536ce7a |
affected | ||
3dcbdb134f329842a38f0e6797191b885ab00a00< 65ad047fd83502447269fda8fd26c99077a9af47 |
affected | ||
3dcbdb134f329842a38f0e6797191b885ab00a00< 50868de7dc4e7f0fcadd6029f32bf4387c102ee6 |
affected | ||
3dcbdb134f329842a38f0e6797191b885ab00a00< ad25a115f50800c6847e0d841c5c7992a9f7c1b3 |
affected | ||
3dcbdb134f329842a38f0e6797191b885ab00a00< 598d9e30927b15731e83797fbd700ecf399f42dd |
affected | ||
3dcbdb134f329842a38f0e6797191b885ab00a00< 9e4b7a99a03aefd37ba7bb1f022c8efab5019165 |
affected | ||
| … +15 条更多 | |||
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一、 漏洞 CVE-2022-49872 基础信息
漏洞信息
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Vulnerability Title
net: gso: fix panic on frag_list with mixed head alloc types
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
net: gso: fix panic on frag_list with mixed head alloc types
Since commit 3dcbdb134f32 ("net: gso: Fix skb_segment splat when
splitting gso_size mangled skb having linear-headed frag_list"), it is
allowed to change gso_size of a GRO packet. However, that commit assumes
that "checking the first list_skb member suffices; i.e if either of the
list_skb members have non head_frag head, then the first one has too".
It turns out this assumption does not hold. We've seen BUG_ON being hit
in skb_segment when skbs on the frag_list had differing head_frag with
the vmxnet3 driver. This happens because __netdev_alloc_skb and
__napi_alloc_skb can return a skb that is page backed or kmalloced
depending on the requested size. As the result, the last small skb in
the GRO packet can be kmalloced.
There are three different locations where this can be fixed:
(1) We could check head_frag in GRO and not allow GROing skbs with
different head_frag. However, that would lead to performance
regression on normal forward paths with unmodified gso_size, where
!head_frag in the last packet is not a problem.
(2) Set a flag in bpf_skb_net_grow and bpf_skb_net_shrink indicating
that NETIF_F_SG is undesirable. That would need to eat a bit in
sk_buff. Furthermore, that flag can be unset when all skbs on the
frag_list are page backed. To retain good performance,
bpf_skb_net_grow/shrink would have to walk the frag_list.
(3) Walk the frag_list in skb_segment when determining whether
NETIF_F_SG should be cleared. This of course slows things down.
This patch implements (3). To limit the performance impact in
skb_segment, the list is walked only for skbs with SKB_GSO_DODGY set
that have gso_size changed. Normal paths thus will not hit it.
We could check only the last skb but since we need to walk the whole
list anyway, let's stay on the safe side.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
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，该漏洞源于网络GSO驱动中对混合头分配类型的frag_list处理不当，可能导致内核崩溃。
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-2022-49872 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2022-49872 补丁与修复 (8)
同批安全公告 · Linux · 2025-05-01 · 共 245 条
| CVE-2025-37750 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-37778 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-49770 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-49931 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37776 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37777 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37790 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-49910 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-49886 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-23159 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37749 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37774 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37789 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37779 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-49920 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-49919 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37756 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37761 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37763 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-23141 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 245 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2022-49872
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