CVE-2026-80848
Vulnerability Scoring
Analysis In Progress
CVE-2026-80848 Vulnerability Analysis & Exploit Details
CVE-2026-80848
Attack Complexity Details
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Attack Complexity:
Attack Complexity Analysis In Progress
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Attack Vector:
Attack Vector Under Analysis
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Privileges Required:
None
No authentication is required for exploitation.
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Scope:
Impact is confined to the initially vulnerable component.
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User Interaction:
None
No user interaction is necessary for exploitation.
CVE-2026-80848 Details
Status: Received on 04 Sep 2026, 16:18 UTC
Published on: 04 Sep 2026, 16:18 UTC
CVSS Release:
CVE-2026-80848 Vulnerability Summary
CVE-2026-80848: In the Linux kernel, the following vulnerability has been resolved: xfrm: espintcp: fix UAF during close ZDI reported and analyzed a race condition during close for espintcp sockets: espintcp_close() frees emsg->skb via kfree_skb() without holding any socket lock. Concurrently, the xfrm_trans_reinject work queue invokes esp_output_tcp_finish() -> espintcp_push_skb() -> espintcp_push_msgs() -> skb_send_sock_locked(), which reads the same skb as a data source. Fix this by adding a synchronize_rcu() call after resetting sk_prot, since esp_output_tcp_finish() runs under RCU and won't use a socket with sk_prot == &tcp_prot. Simply taking the socket lock in espintcp_close() could lead to leaks, if esp_output_tcp_finish() re-adds an skb in the slot we just freed. After this, the existing barrier() is no longer needed.
Assessing the Risk of CVE-2026-80848
Access Complexity Graph
The exploitability of CVE-2026-80848 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).
Exploitability Analysis for CVE-2026-80848
No exploitability data is available for CVE-2026-80848.
Understanding AC and PR
A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.
Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.
Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.
CVSS Score Breakdown Chart
Above is the CVSS Sub-score Breakdown for CVE-2026-80848, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.
CIA Impact Analysis
Below is the Impact Analysis for CVE-2026-80848, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.
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Confidentiality:
None
CVE-2026-80848 does not compromise confidentiality.
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Integrity:
None
CVE-2026-80848 does not impact data integrity.
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Availability:
None
CVE-2026-80848 does not affect system availability.
CVE-2026-80848 References
External References
- https://git.kernel.org/stable/c/24efebecf415ba264adba0f0491cec436463a14f
- https://git.kernel.org/stable/c/29121c5e6591da527e8e36ddac7120dc527f574d
- https://git.kernel.org/stable/c/4b31a875693c480c611519faca46216514e3e052
- https://git.kernel.org/stable/c/4bc0dfa28dca6fc0084203732695968049c44072
- https://git.kernel.org/stable/c/54b41ad14da9a981131ab6e4d3f79321a503ea5d
- https://git.kernel.org/stable/c/deb232e884877bf10b4ce2580909eedec986c284
- https://git.kernel.org/stable/c/eb3bbf29c723fe75c0eb92be14f0ec92971fe272
- https://git.kernel.org/stable/c/ed5d9102190c45fc70121c036b0626b740040b75
- https://git.kernel.org/stable/c/ff8dd7a932f34409a56e1b91a1219340f17457e9
CWE Common Weakness Enumeration
Unknown
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