CVE-2026-9080
説明
A flaw was found in libcurl. When curl_easy_pause() is called within the event-based CURLMOPT_SOCKETFUNCTION callback, a use-after-free vulnerability is triggered. This occurs because libcurl attempts to store a flag using a pointer to memory that has already been freed. An attacker could potentially exploit this to cause a denial of service or execute arbitrary code.
詳細
This Important flaw in libcurl stems from a use-after-free vulnerability when curl_easy_pause() is called within the CURLMOPT_SOCKETFUNCTION callback. This could allow an attacker to achieve denial of service or arbitrary code execution without requiring user interaction or elevated privileges. While dependent on a specific application implementation, the broad adoption of libcurl means Red Hat products leveraging this callback pattern could be affected.
軽減策
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
CVSS (Common Vulnerability Scoring System) のスコアの詳細
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 スコアの内訳
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| ベーススコア | 7.3 | N/A | 7.3 |
| 攻撃ベクトル | Network | N/A | Network |
| 攻撃の複雑さ | Low | N/A | Low |
| 必要な権限 | None | N/A | None |
| ユーザー関与レベル | None | N/A | None |
| 範囲 | Unchanged | N/A | Unchanged |
| 機密性 | Low | N/A | Low |
| 完全性への影響 | Low | N/A | Low |
| 可用性への影響 | Low | N/A | Low |
ベクトル
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
脆弱性の原因 (CWE) の理解
Confidentiality
Technical Impact: Read Memory
If the expired pointer is used in a read operation, an attacker might be able to control data read in by the application.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
If the expired pointer references a memory location that is not accessible to the product, or points to a location that is "malformed" (such as NULL) or larger than expected by a read or write operation, then a crash may occur.
Integrity,Confidentiality,Availability
Technical Impact: Execute Unauthorized Code or Commands
If the expired pointer is used in a function call, or points to unexpected data in a write operation, then code execution may be possible.
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