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
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)
guessed Create a notification for this product.
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)
guessed Create a notification for this product.
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{
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              "status": "unaffected",
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      "cpeApplicability": [
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                  "versionStartIncluding": "5.2",
                  "vulnerable": true
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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."
        }
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      "providerMetadata": {
        "dateUpdated": "2026-08-22T15:32:05.719Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/e8e7471ef686b6c002218fee9671cc61992ae01a"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74622",
    "datePublished": "2026-08-22T15:32:05.719Z",
    "dateReserved": "2026-08-15T05:44:03.921Z",
    "dateUpdated": "2026-08-22T15:32:05.719Z",
    "state": "PUBLISHED"
  },
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      "date": "2026-08-29",
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      "title": "net: atlantic: free RX pages of consumed but not refilled buffers",
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      "version": "2"
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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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/ethernet/aquantia/atlantic/aq_ring.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86\",\"lessThan\":\"1e58b0bab40dcbdfc04acaba6a221d40801c3770\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86\",\"lessThan\":\"30c473ea097ef0c93b064281b3e295c97d17e28b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86\",\"lessThan\":\"17c99dd86f169c7a3e73d6778e79ef5b1ed3ceac\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86\",\"lessThan\":\"ff451bc4290b79c04f1c5cfa928d448f9d47ecf5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86\",\"lessThan\":\"64e1346bc66b947eb80b848e4c8d9828ba50e0fe\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86\",\"lessThan\":\"782cc40b7ade4614a8aec0b948b8cf95c69f8d4b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86\",\"lessThan\":\"24d87dc28ddd3771dd0e88719209811809729439\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86\",\"lessThan\":\"e8e7471ef686b6c002218fee9671cc61992ae01a\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/ethernet/aquantia/atlantic/aq_ring.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.2\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.2\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.265\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.216\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.183\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.152\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.104\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.45\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.9\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/17c99dd86f169c7a3e73d6778e79ef5b1ed3ceac\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1e58b0bab40dcbdfc04acaba6a221d40801c3770\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/24d87dc28ddd3771dd0e88719209811809729439\",\"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\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "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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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

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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.
  • 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.


Detection rules are retrieved from Rulezet.