CVE-2026-35091
| Summary |
A flaw was found in Corosync. A remote unauthenticated attacker can exploit a wrong return value vulnerability in the Corosync membership commit token sanity check by sending a specially crafted User Datagram Protocol (UDP) packet. This can lead to an out-of-bounds read, causing a denial of service (DoS) and potentially disclosing limited memory contents. This vulnerability affects Corosync when running in totemudp/totemudpu mode, which is the default configuration.
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| Publication Date |
April 1, 2026, 11:16 p.m. |
| Registration Date |
April 15, 2026, 11:22 a.m. |
| Last Update |
April 8, 2026, 1:34 a.m. |
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CVSS3.1 : HIGH
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| スコア |
8.2
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| Vector |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H |
| 攻撃元区分(AV) |
ネットワーク |
| 攻撃条件の複雑さ(AC) |
低 |
| 攻撃に必要な特権レベル(PR) |
不要 |
| 利用者の関与(UI) |
不要 |
| 影響の想定範囲(S) |
変更なし |
| 機密性への影響(C) |
低 |
| 完全性への影響(I) |
なし |
| 可用性への影響(A) |
高 |
Affected software configurations
| Configuration1 |
or higher |
or less |
more than |
less than |
| cpe:2.3:a:corosync:corosync:-:*:*:*:*:*:*:* |
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| cpe:2.3:a:redhat:openshift:4.0:*:*:*:*:*:*:* |
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| cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* |
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| cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* |
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| cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* |
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| cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:* |
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Related information, measures and tools
Common Vulnerabilities List