CVE-2026-43445
Vulnerability Scoring
Analysis In Progress
CVE-2026-43445 Vulnerability Analysis & Exploit Details
CVE-2026-43445
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-2026-43445 Details
Status: Received on 08 May 2026, 15:16 UTC
Published on: 08 May 2026, 15:16 UTC
CVSS Release:
CVE-2026-43445 Vulnerability Summary
CVE-2026-43445: In the Linux kernel, the following vulnerability has been resolved: e1000/e1000e: Fix leak in DMA error cleanup If an error is encountered while mapping TX buffers, the driver should unmap any buffers already mapped for that skb. Because count is incremented after a successful mapping, it will always match the correct number of unmappings needed when dma_error is reached. Decrementing count before the while loop in dma_error causes an off-by-one error. If any mapping was successful before an unsuccessful mapping, exactly one DMA mapping would leak. In these commits, a faulty while condition caused an infinite loop in dma_error: Commit 03b1320dfcee ("e1000e: remove use of skb_dma_map from e1000e driver") Commit 602c0554d7b0 ("e1000: remove use of skb_dma_map from e1000 driver") Commit c1fa347f20f1 ("e1000/e1000e/igb/igbvf/ixgb/ixgbe: Fix tests of unsigned in *_tx_map()") fixed the infinite loop, but introduced the off-by-one error. This issue may still exist in the igbvf driver, but I did not address it in this patch.
Assessing the Risk of CVE-2026-43445
Access Complexity Graph
The exploitability of CVE-2026-43445 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-2026-43445
No exploitability data is available for CVE-2026-43445.
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-2026-43445, 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-2026-43445, 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-2026-43445 does not compromise confidentiality.
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Integrity:
None
CVE-2026-43445 does not impact data integrity.
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Availability:
None
CVE-2026-43445 does not affect system availability.
CVE-2026-43445 References
External References
- https://git.kernel.org/stable/c/0606c24a745bafd1be5d66c48361638cd9cad74b
- https://git.kernel.org/stable/c/0a1fc25deabab4efce64610e3c449485c4fa8f5f
- https://git.kernel.org/stable/c/10b5e65959e955a1c8894e0a5413944b5a70204a
- https://git.kernel.org/stable/c/30e87ade8d678c25a8546cf38c0b498fa5cb27d3
- https://git.kernel.org/stable/c/519051c711dfd239ef6e4b28878efee400a035f9
- https://git.kernel.org/stable/c/7eaeb778bfaa3b2a804f89321c234d59c74569db
- https://git.kernel.org/stable/c/e94eaef11142b01f77bf8ba4d0b59720b7858109
- https://git.kernel.org/stable/c/fa5ba9867a55e640df0dc79bf0199770fb043f03
CWE Common Weakness Enumeration
Unknown
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