CVE-2025-39797— 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，该漏洞源于未正确处理安全参数索引重复问题，可能导致数据包处理失败。
可能的 ATT&CK 技术 1 AI
T1498 · Network Denial of Service影响版本矩阵 12
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 3d8090bb53424432fa788fe9a49e8ceca74f0544 |
affected |
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 2fc5b54368a1bf1d2d74b4d3b8eea5309a653e38 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< c67d4e7a8f90fb6361ca89d4d5c9a28f4e935e47 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 29e9158f91f99057dbd35db5e8674d93b38549fe |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 94f39804d891cffe4ce17737d295f3b195bc7299 |
affected | ||
2.6.12 |
affected | ||
< 2.6.12 |
unaffected | ||
6.6.103≤ 6.6.* |
unaffected | ||
| … +4 条更多 | |||
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一、 漏洞 CVE-2025-39797 基础信息
漏洞信息
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Vulnerability Title
xfrm: Duplicate SPI Handling
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
xfrm: Duplicate SPI Handling
The issue originates when Strongswan initiates an XFRM_MSG_ALLOCSPI
Netlink message, which triggers the kernel function xfrm_alloc_spi().
This function is expected to ensure uniqueness of the Security Parameter
Index (SPI) for inbound Security Associations (SAs). However, it can
return success even when the requested SPI is already in use, leading
to duplicate SPIs assigned to multiple inbound SAs, differentiated
only by their destination addresses.
This behavior causes inconsistencies during SPI lookups for inbound packets.
Since the lookup may return an arbitrary SA among those with the same SPI,
packet processing can fail, resulting in packet drops.
According to RFC 4301 section 4.4.2 , for inbound processing a unicast SA
is uniquely identified by the SPI and optionally protocol.
Reproducing the Issue Reliably:
To consistently reproduce the problem, restrict the available SPI range in
charon.conf : spi_min = 0x10000000 spi_max = 0x10000002
This limits the system to only 2 usable SPI values.
Next, create more than 2 Child SA. each using unique pair of src/dst address.
As soon as the 3rd Child SA is initiated, it will be assigned a duplicate
SPI, since the SPI pool is already exhausted.
With a narrow SPI range, the issue is consistently reproducible.
With a broader/default range, it becomes rare and unpredictable.
Current implementation:
xfrm_spi_hash() lookup function computes hash using daddr, proto, and family.
So if two SAs have the same SPI but different destination addresses, then
they will:
a. Hash into different buckets
b. Be stored in different linked lists (byspi + h)
c. Not be seen in the same hlist_for_each_entry_rcu() iteration.
As a result, the lookup will result in NULL and kernel allows that Duplicate SPI
Proposed Change:
xfrm_state_lookup_spi_proto() does a truly global search - across all states,
regardless of hash bucket and matches SPI and proto.
来源: CVE Program / CVE List V5
CVSS Information
N/A
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，该漏洞源于未正确处理安全参数索引重复问题，可能导致数据包处理失败。
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-2025-39797 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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同批安全公告 · Linux · 2025-09-12 · 共 7 条
| CVE-2025-39792 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-39793 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-39798 | 7.3 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-39794 | Linux kernel 安全漏洞 | |
| CVE-2025-39795 | Linux kernel 安全漏洞 | |
| CVE-2025-39796 | Linux kernel 安全漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2025-39797
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