CVE-2026-43114— 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nft_set_pipapo_avx2函数在过期条目匹配时掩码错误，可能导致返回不匹配条目。
影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 7400b063969bdca4a06cd97f1294d765c8eecbe1< f8c39983fc9c1a978c82e6f2df7bfba8a8561587 |
affected |
7400b063969bdca4a06cd97f1294d765c8eecbe1< c7babe2f28b507e17f28e9f753b7caec72d4857f |
affected | ||
7400b063969bdca4a06cd97f1294d765c8eecbe1< 1c43f0dd8691ddf8884793b481ddc7511cf593c3 |
affected | ||
7400b063969bdca4a06cd97f1294d765c8eecbe1< fa4f1f52528c73989d820f32bfca06bec5afeece |
affected | ||
7400b063969bdca4a06cd97f1294d765c8eecbe1< 3d53f9aafd469ae1ea27051e00f5b96ca1b55d52 |
affected | ||
7400b063969bdca4a06cd97f1294d765c8eecbe1< 07de44424bb7f17ef9357e8535df96d9e97c40cb |
affected | ||
7400b063969bdca4a06cd97f1294d765c8eecbe1< 0abbc43f71d99baadeeba6fa3fe1c80b676f57ed |
affected | ||
7400b063969bdca4a06cd97f1294d765c8eecbe1< d3c0037ffe1273fa1961e779ff6906234d6cf53c |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2026-43114 基础信息
漏洞信息
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Vulnerability Title
netfilter: nft_set_pipapo_avx2: don't return non-matching entry on expiry
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
netfilter: nft_set_pipapo_avx2: don't return non-matching entry on expiry
New test case fails unexpectedly when avx2 matching functions are used.
The test first loads a ranomly generated pipapo set
with 'ipv4 . port' key, i.e. nft -f foo.
This works. Then, it reloads the set after a flush:
(echo flush set t s; cat foo) | nft -f -
This is expected to work, because its the same set after all and it was
already loaded once.
But with avx2, this fails: nft reports a clashing element.
The reported clash is of following form:
We successfully re-inserted
a . b
c . d
Then we try to insert a . d
avx2 finds the already existing a . d, which (due to 'flush set') is marked
as invalid in the new generation. It skips the element and moves to next.
Due to incorrect masking, the skip-step finds the next matching
element *only considering the first field*,
i.e. we return the already reinserted "a . b", even though the
last field is different and the entry should not have been matched.
No such error is reported for the generic c implementation (no avx2) or when
the last field has to use the 'nft_pipapo_avx2_lookup_slow' fallback.
Bisection points to
7711f4bb4b36 ("netfilter: nft_set_pipapo: fix range overlap detection")
but that fix merely uncovers this bug.
Before this commit, the wrong element is returned, but erronously
reported as a full, identical duplicate.
The root-cause is too early return in the avx2 match functions.
When we process the last field, we should continue to process data
until the entire input size has been consumed to make sure no stale
bits remain in the map.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
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nft_set_pipapo_avx2函数在过期条目匹配时掩码错误，可能导致返回不匹配条目。
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-2026-43114 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-43114 补丁与修复 (8)
同批安全公告 · Linux · 2026-05-06 · 共 224 条
| CVE-2026-43208 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-43198 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-43125 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-43185 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-43186 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-43197 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-43117 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-43083 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-43172 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-43283 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-43176 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-43113 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-43112 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-43232 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-43215 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-43249 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-43239 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-43158 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-43187 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-43110 | 8.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 224 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-43114
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