CVE-2026-74622 (GCVE-0-2026-74622)

Vulnerability from cvelistv5 – Published: 2026-08-22 15:32 – Updated: 2026-08-22 15:32
VLAI
Title
net: atlantic: free RX pages of consumed but not refilled buffers
Summary
In the Linux kernel, the following vulnerability has been resolved: net: atlantic: free RX pages of consumed but not refilled buffers aq_ring_rx_deinit() only walks [sw_head, sw_tail), the region posted to hardware. Since the page reuse strategy was added, a cleaned RX buffer keeps its page (and its DMA mapping) in the ring for reuse, and refill is batched: aq_ring_rx_fill() returns early until AQ_CFG_RX_REFILL_THRES slots are free. Slots that were consumed but not yet reposted therefore sit in the complementary [sw_tail, sw_head) gap with a live page, and the deinit walk never visits them: up to a refill batch worth of pages and DMA mappings leak on every interface down. Walk the whole ring instead and release whatever is still there. Also bail out if the buffer ring is already gone: a partial aq_ptp_ring_alloc() failure frees the ring but leaves aq_nic set, so aq_ptp_ring_deinit() still gets here on the unwind path.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6665 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 , < 1e58b0bab40dcbdfc04acaba6a221d40801c3770 (git)
Affected: 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 , < 30c473ea097ef0c93b064281b3e295c97d17e28b (git)
Affected: 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 , < 17c99dd86f169c7a3e73d6778e79ef5b1ed3ceac (git)
Affected: 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 , < ff451bc4290b79c04f1c5cfa928d448f9d47ecf5 (git)
Affected: 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 , < 64e1346bc66b947eb80b848e4c8d9828ba50e0fe (git)
Affected: 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 , < 782cc40b7ade4614a8aec0b948b8cf95c69f8d4b (git)
Affected: 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 , < 24d87dc28ddd3771dd0e88719209811809729439 (git)
Affected: 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 , < e8e7471ef686b6c002218fee9671cc61992ae01a (git)
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Linux Linux Affected: 5.2
Unaffected: 0 , < 5.2 (semver)
Unaffected: 5.10.265 , ≤ 5.10.* (semver)
Unaffected: 5.15.216 , ≤ 5.15.* (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.152 , ≤ 6.6.* (semver)
Unaffected: 6.12.104 , ≤ 6.12.* (semver)
Unaffected: 6.18.45 , ≤ 6.18.* (semver)
Unaffected: 7.1.9 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: atlantic: free RX pages of consumed but not refilled buffers\n\naq_ring_rx_deinit() only walks [sw_head, sw_tail), the region posted to\nhardware. Since the page reuse strategy was added, a cleaned RX buffer\nkeeps its page (and its DMA mapping) in the ring for reuse, and refill\nis batched: aq_ring_rx_fill() returns early until AQ_CFG_RX_REFILL_THRES\nslots are free. Slots that were consumed but not yet reposted therefore\nsit in the complementary [sw_tail, sw_head) gap with a live page, and\nthe deinit walk never visits them: up to a refill batch worth of pages\nand DMA mappings leak on every interface down.\n\nWalk the whole ring instead and release whatever is still there. Also\nbail out if the buffer ring is already gone: a partial\naq_ptp_ring_alloc() failure frees the ring but leaves aq_nic set, so\naq_ptp_ring_deinit() still gets here on the unwind path."
        }
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    "datePublished": "2026-08-22T15:32:05.719Z",
    "dateReserved": "2026-08-15T05:44:03.921Z",
    "dateUpdated": "2026-08-22T15:32:05.719Z",
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      "version": "4"
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        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: atlantic: free RX pages of consumed but not refilled buffers\n\naq_ring_rx_deinit() only walks [sw_head, sw_tail), the region posted to\nhardware. Since the page reuse strategy was added, a cleaned RX buffer\nkeeps its page (and its DMA mapping) in the ring for reuse, and refill\nis batched: aq_ring_rx_fill() returns early until AQ_CFG_RX_REFILL_THRES\nslots are free. Slots that were consumed but not yet reposted therefore\nsit in the complementary [sw_tail, sw_head) gap with a live page, and\nthe deinit walk never visits them: up to a refill batch worth of pages\nand DMA mappings leak on every interface down.\n\nWalk the whole ring instead and release whatever is still there. Also\nbail out if the buffer ring is already gone: a partial\naq_ptp_ring_alloc() failure frees the ring but leaves aq_nic set, so\naq_ptp_ring_deinit() still gets here on the unwind path."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet: atlantic: liberar p\u00e1ginas RX de b\u00faferes consumidos pero no rellenados\n\naq_ring_rx_deinit() solo recorre [sw_head, sw_tail), la regi\u00f3n publicada al hardware. Desde que se a\u00f1adi\u00f3 la estrategia de reutilizaci\u00f3n de p\u00e1ginas, un b\u00fafer RX limpiado mantiene su p\u00e1gina (y su mapeo DMA) en el anillo para su reutilizaci\u00f3n, y el rellenado se realiza por lotes: aq_ring_rx_fill() retorna anticipadamente hasta que AQ_CFG_RX_REFILL_THRES ranuras est\u00e9n libres. Las ranuras que fueron consumidas pero a\u00fan no republicadas, por lo tanto, se encuentran en el hueco complementario [sw_tail, sw_head) con una p\u00e1gina activa, y el recorrido de desinicializaci\u00f3n nunca las visita: hasta un lote de rellenado de p\u00e1ginas y mapeos DMA se fugan en cada bajada de interfaz.\n\nRecorrer todo el anillo en su lugar y liberar lo que a\u00fan est\u00e9 all\u00ed. Tambi\u00e9n salir si el anillo de b\u00fafer ya no existe: un fallo parcial de aq_ptp_ring_alloc() libera el anillo pero deja aq_nic establecido, por lo que aq_ptp_ring_deinit() a\u00fan llega aqu\u00ed en la ruta de desenrollado."
          }
        ],
        "id": "CVE-2026-74622",
        "lastModified": "2026-10-14T13:10:00.187",
        "metrics": {},
        "published": "2026-08-22T16:16:35.027",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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          },
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            "url": "https://git.kernel.org/stable/c/1e58b0bab40dcbdfc04acaba6a221d40801c3770"
          },
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          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/30c473ea097ef0c93b064281b3e295c97d17e28b"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/64e1346bc66b947eb80b848e4c8d9828ba50e0fe"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/782cc40b7ade4614a8aec0b948b8cf95c69f8d4b"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/e8e7471ef686b6c002218fee9671cc61992ae01a"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/ff451bc4290b79c04f1c5cfa928d448f9d47ecf5"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-25T10:02:33+00:00",
      "cve": "CVE-2026-74622",
      "id": "CVE-2026-74622",
      "initial_release_date": "2026-08-22T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net: atlantic: free RX pages of consumed but not refilled buffers",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74622.json",
      "version": "3"
    }
  }
}



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Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.

Sightings

Author Source Type Date Other

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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.