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CVE-2026-43462 (GCVE-0-2026-43462)

Vulnerability from cvelistv5 – Published: 2026-05-08 14:22 – Updated: 2026-08-05 12:28
VLAI
Title
net: spacemit: Fix error handling in emac_tx_mem_map()
Summary
In the Linux kernel, the following vulnerability has been resolved: net: spacemit: Fix error handling in emac_tx_mem_map() The DMA mappings were leaked on mapping error. Free them with the existing emac_free_tx_buf() function.
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: bfec6d7f2001c7470c3cd261ae65a3ba8737f226 , < c34ebd7b24ea70be3c6fdb6936f79f593f37df60 (git)
Affected: bfec6d7f2001c7470c3cd261ae65a3ba8737f226 , < edeaba385318f60ec1b32470da4d5eb800294d16 (git)
Affected: bfec6d7f2001c7470c3cd261ae65a3ba8737f226 , < 86292155bea578ebab0ca3b65d4d87ecd8a0e9ea (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.18
Unaffected: 0 , < 6.18 (semver)
Unaffected: 6.18.19 , ≤ 6.18.* (semver)
Unaffected: 6.19.9 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website

{
  "containers": {
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      "affected": [
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          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/spacemit/k1_emac.c"
          ],
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              "value": "AV:N - The vulnerable transmit path is reachable by network-driven egress traffic on a SpacemiT K1 system, such as routed packets or unauthenticated service responses that cause SKBs to be queued to this Ethernet device.\nAC:L - There is no race or precise timing requirement; an attacker can repeatedly drive fragmented TX traffic and resource pressure until a mid-packet DMA mapping failure exercises the buggy cleanup path.\nPR:N - In a network-facing or forwarding deployment, the attacker does not need local credentials or kernel capabilities to cause packets to be transmitted through the affected NIC.\nUI:N - No victim user action is required once the affected interface and service/forwarding path are active.\nS:U - The impact remains within the kernel/network device availability domain and does not cross a VM, IOMMU isolation, or sandbox security boundary.\nC:N - The confirmed bug is an orphaned DMA mapping/resource leak on TX mapping failure, with no demonstrated attacker-visible read primitive.\nI:N - The leaked DMA mappings are for TX buffers and the fix does not indicate an arbitrary write, data modification, or control-flow corruption primitive.\nA:H - Repeated leaks of DMA/IOMMU mapping resources can exhaust DMA resources and cause sustained transmit failure or complete network loss on the affected device."
            }
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    "datePublished": "2026-05-08T14:22:24.686Z",
    "dateReserved": "2026-05-01T14:12:56.010Z",
    "dateUpdated": "2026-08-05T12:28:06.464Z",
    "state": "PUBLISHED"
  },
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    "redhat_vex": {
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      "current_release_date": "2026-06-28T11:35:41+00:00",
      "cve": "CVE-2026-43462",
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      "title": "SUSE CVE CVE-2026-43462",
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      "version": "4"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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