CVE-2026-80844
Vulnerability Scoring
Analysis In Progress
CVE-2026-80844 Vulnerability Analysis & Exploit Details
CVE-2026-80844
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-2026-80844 Details
Status: Received on 04 Sep 2026, 16:18 UTC
Published on: 04 Sep 2026, 16:18 UTC
CVSS Release:
CVE-2026-80844 Vulnerability Summary
CVE-2026-80844: In the Linux kernel, the following vulnerability has been resolved: xfrm: ah6: validate routing header segments_left AH6 rearranges routing-header addresses before computing or verifying the ICV. ipv6_rearrange_rthdr() assumes that segments_left is not larger than the number of addresses described by the routing header's hdrlen field. That assumption does not hold for raw IPv6 HDRINCL packets. A packet with hdrlen equal to 2 describes one address, but can carry an arbitrary segments_left value. With segments_left equal to 255, the function moves its address pointer 4,064 bytes backwards and passes a 4,064-byte length to memmove(), resulting in an out-of-bounds access. Validate the invariant locally before modifying the routing header or performing any address-pointer arithmetic, and propagate malformed-header errors to the existing AH6 input and output error paths.
Assessing the Risk of CVE-2026-80844
Access Complexity Graph
The exploitability of CVE-2026-80844 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-2026-80844
No exploitability data is available for CVE-2026-80844.
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-2026-80844, 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-2026-80844, 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-2026-80844 does not compromise confidentiality.
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Integrity:
None
CVE-2026-80844 does not impact data integrity.
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Availability:
None
CVE-2026-80844 does not affect system availability.
CVE-2026-80844 References
External References
- https://git.kernel.org/stable/c/0bf11081ad3753938a2b48723ce6298dbac743a1
- https://git.kernel.org/stable/c/1516e31ac458a738be485620579d8f7fb2700fcb
- https://git.kernel.org/stable/c/1b7e066eabcc7d6d8f476c34739b45932f2f4c31
- https://git.kernel.org/stable/c/2dc650956e4e163b879b3fb1027f9557abc5c985
- https://git.kernel.org/stable/c/46640c814f25f096b0b0045ca50e1b7030cd8a30
- https://git.kernel.org/stable/c/48b0e36cf54358276ee7aa897034c973097d2bc9
- https://git.kernel.org/stable/c/6733ae71268a27d598cfb3f3339a3c950b9b656d
- https://git.kernel.org/stable/c/7bad4bda74dc4713f398d3b7624ff05478e3a568
- https://git.kernel.org/stable/c/f00df8500e5a36ba70d336fd34bd2152ea074e5f
CWE Common Weakness Enumeration
Unknown
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