원문 설명
In the Linux kernel, the following vulnerability has been resolved: tls: fix handling of zero-length records on the rx_list Each recvmsg() call must process either - only contiguous DATA records (any number of them) - one non-DATA record If the next record has different type than what has already been processed we break out of the main processing loop. If the record has already been decrypted (which may be the case for TLS 1.3 where we don't know type until decryption) we queue the pending record to the rx_list. Next recvmsg() will pick it up from there. Queuing the skb to rx_list after zero-copy decrypt is not possible, since in that case we decrypted directly to the user space buffer, and we don't have an skb to queue (darg.skb points to the ciphertext skb for access to metadata like length). Only data records are allowed zero-copy, and we break the processing loop after each non-data record. So we should never zero-copy and then find out that the record type has changed. The corner case we missed is when the initial record comes from rx_list, and it's zero length.
실제 악용 확인(CISA KEV)
- KEV 등재일
- 2026-09-18
- 조치 기한(미 연방기관)
- 2026-09-21
- 랜섬웨어 사용
- Unknown
- 요구 조치
- Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
상세
- 공개일
- 2025-09-06
- 최종 수정
- 2026-10-08
- CVSS 벡터
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- EPSS(30일 내 악용 확률)
- 3.31% (백분위 89)
참고 자료
- cve.org/CVE-2025-39682
- nvd.nist.gov/vuln/detail/CVE-2025-39682
- git.kernel.org/stable/c/2902c3ebcca52ca845c03182000e8d71d3a5196f
- git.kernel.org/stable/c/c09dd3773b5950e9cfb6c9b9a5f6e36d06c62677
- git.kernel.org/stable/c/3439c15ae91a517cf3c650ea15a8987699416ad9
- git.kernel.org/stable/c/29c0ce3c8cdb6dc5d61139c937f34cb888a6f42e
- git.kernel.org/stable/c/62708b9452f8eb77513115b17c4f8d1a22ebf843
내 서버의 버전을 직접 추적하세요
InfraGuard 는 모든 서버에 설치된 소프트웨어 버전을 수집하고, 알려진 취약점이 있는 버전을 알려 줍니다. 자체 호스팅이라 데이터가 내 네트워크를 벗어나지 않습니다.
이 제품은 NVD API 데이터를 사용하지만 NVD 의 보증이나 인증을 받은 것은 아닙니다. CVE® 는 The MITRE Corporation 의 등록 상표이며, CVE 레코드는 CVE Program 이용 약관에 따라 사용합니다.