CVE-2026-43289
Vulnerability Scoring
Analysis In Progress
CVE-2026-43289 Vulnerability Analysis & Exploit Details
CVE-2026-43289
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-2026-43289 Details
Status: Received on 08 May 2026, 14:16 UTC
Published on: 08 May 2026, 14:16 UTC
CVSS Release:
CVE-2026-43289 Vulnerability Summary
CVE-2026-43289: In the Linux kernel, the following vulnerability has been resolved: kexec: derive purgatory entry from symbol kexec_load_purgatory() derives image->start by locating e_entry inside an SHF_EXECINSTR section. If the purgatory object contains multiple executable sections with overlapping sh_addr, the entrypoint check can match more than once and trigger a WARN. Derive the entry section from the purgatory_start symbol when present and compute image->start from its final placement. Keep the existing e_entry fallback for purgatories that do not expose the symbol. WARNING: kernel/kexec_file.c:1009 at kexec_load_purgatory+0x395/0x3c0, CPU#10: kexec/1784 Call Trace: <TASK> bzImage64_load+0x133/0xa00 __do_sys_kexec_file_load+0x2b3/0x5c0 do_syscall_64+0x81/0x610 entry_SYSCALL_64_after_hwframe+0x76/0x7e [me@linux.beauty: move helper to avoid forward declaration, per Baoquan]
Assessing the Risk of CVE-2026-43289
Access Complexity Graph
The exploitability of CVE-2026-43289 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-2026-43289
No exploitability data is available for CVE-2026-43289.
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-2026-43289, 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-2026-43289, 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-2026-43289 does not compromise confidentiality.
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Integrity:
None
CVE-2026-43289 does not impact data integrity.
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Availability:
None
CVE-2026-43289 does not affect system availability.
CVE-2026-43289 References
External References
- https://git.kernel.org/stable/c/027797595a108726f4a0a45d225f603b0ffbd22b
- https://git.kernel.org/stable/c/1737d37ae1d2814e6cf0a1af87af3d41f0812b95
- https://git.kernel.org/stable/c/36eb314184a0ae74dd42914b47d2b9fc43be8034
- https://git.kernel.org/stable/c/480e1d5c64bb14441f79f2eb9421d5e26f91ea3d
- https://git.kernel.org/stable/c/5226570bd252cea2e805a161cb0f75c204c3108a
- https://git.kernel.org/stable/c/875355152b33436907c2a6d2ffad1431fa86c62b
- https://git.kernel.org/stable/c/cfccd3b8c51bc57a8a6fcb2fd30453afae5bc0d2
- https://git.kernel.org/stable/c/f736032c638a33a243e9126e617788f763d648f9
CWE Common Weakness Enumeration
Unknown
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