CVE-2023-53394 (GCVE-0-2023-53394)

Vulnerability from cvelistv5 – Published: 2025-09-18 13:33 – Updated: 2026-10-30 12:17
VLAI
Title
net/mlx5e: xsk: Fix crash on regular rq reactivation
Summary
In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: xsk: Fix crash on regular rq reactivation When the regular rq is reactivated after the XSK socket is closed it could be reading stale cqes which eventually corrupts the rq. This leads to no more traffic being received on the regular rq and a crash on the next close or deactivation of the rq. Kal Cuttler Conely reported this issue as a crash on the release path when the xdpsock sample program is stopped (killed) and restarted in sequence while traffic is running. This patch flushes all cqes when during the rq flush. The cqe flushing is done in the reset state of the rq. mlx5e_rq_to_ready code is moved into the flush function to allow for this.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-14 18:59 UTC
CWE
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 082a9edf12fef88400172e7d1b131d65a3ed492e , < ecf583abb07da326d5058dc6ba79dae58aa800d3 (git)
Affected: 082a9edf12fef88400172e7d1b131d65a3ed492e , < 02a84eb2af6bea7871cd34264fb27f141f005fd9 (git)
Affected: 082a9edf12fef88400172e7d1b131d65a3ed492e , < 39646d9bcd1a65d2396328026626859a1dab59d7 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.1
Unaffected: 0 , < 6.1 (semver)
Unaffected: 6.1.191 , ≤ 6.1.* (semver)
Unaffected: 6.4.10 , ≤ 6.4.* (semver)
Unaffected: 6.5 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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                "drivers/net/ethernet/mellanox/mlx5/core/en_main.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "ecf583abb07da326d5058dc6ba79dae58aa800d3",
                  "status": "affected",
                  "version": "082a9edf12fef88400172e7d1b131d65a3ed492e",
                  "versionType": "git"
                },
                {
                  "lessThan": "02a84eb2af6bea7871cd34264fb27f141f005fd9",
                  "status": "affected",
                  "version": "082a9edf12fef88400172e7d1b131d65a3ed492e",
                  "versionType": "git"
                },
                {
                  "lessThan": "39646d9bcd1a65d2396328026626859a1dab59d7",
                  "status": "affected",
                  "version": "082a9edf12fef88400172e7d1b131d65a3ed492e",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "drivers/net/ethernet/mellanox/mlx5/core/en_main.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "6.1"
                },
                {
                  "lessThan": "6.1",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.1.*",
                  "status": "unaffected",
                  "version": "6.1.191",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.4.*",
                  "status": "unaffected",
                  "version": "6.4.10",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.5",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1.191",
                      "versionStartIncluding": "6.1",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.4.10",
                      "versionStartIncluding": "6.1",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.5",
                      "versionStartIncluding": "6.1",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: xsk: Fix crash on regular rq reactivation\n\nWhen the regular rq is reactivated after the XSK socket is closed\nit could be reading stale cqes which eventually corrupts the rq.\nThis leads to no more traffic being received on the regular rq and a\ncrash on the next close or deactivation of the rq.\n\nKal Cuttler Conely reported this issue as a crash on the release\npath when the xdpsock sample program is stopped (killed) and restarted\nin sequence while traffic is running.\n\nThis patch flushes all cqes when during the rq flush. The cqe flushing\nis done in the reset state of the rq. mlx5e_rq_to_ready code is moved\ninto the flush function to allow for this."
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "scenarios": [
                {
                  "lang": "en",
                  "value": "AV:L - The bug is triggered by local AF_XDP bind/teardown that calls ndo_bpf(XDP_SETUP_XSK_POOL) into mlx5e_xsk_enable/disable_locked, which flushes and later reactivates the regular RQ; remote packets alone cannot drive that control path.\nAC:L - The attacker fully controls XSK open/close (and can generate the concurrent RX traffic that leaves stale CQEs), so the flush-without-CQE-drain then reactivate sequence is reliably inducible with no race or layout outside attacker influence.\nPR:L - AF_XDP creation only needs ns_capable(CAP_NET_RAW), and XDP/XSK setup needs CAP_NET_ADMIN/CAP_BPF in the netns owner user_ns; both are obtainable via unshare -Urn, including on an mlx5 VF delegated into a container netns.\nUI:N - The attacker loads XDP, binds/closes the XSK socket, and supplies traffic entirely on its own; no separate victim action is required.\nS:U - Impact is confined to the host kernel\u2019s mlx5e RQ/page-pool objects within the same OS security authority, with no VM escape, IOMMU bypass, or sandbox boundary crossed.\nC:H - Processing stale CQEs against a refilled RQ desynchronizes WQE/page accounting so completion and free_rx_descs can release or reuse page_pool pages still referenced elsewhere, yielding a use-after-free read primitive over reclaimed pages.\nI:H - The same RQ corruption produces page double-free/UAF on the close/deactivate path (and DMA into recycled buffers while HW may still complete), which with heap spraying is exploitable for arbitrary kernel memory corruption and control-flow hijack.\nA:H - The commit-documented result is RQ corruption that stops RX and crashes on the next close/deactivation (oops/panic), which is a full availability loss."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-10-30T12:17:29.409Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/ecf583abb07da326d5058dc6ba79dae58aa800d3"
            },
            {
              "url": "https://git.kernel.org/stable/c/02a84eb2af6bea7871cd34264fb27f141f005fd9"
            },
            {
              "url": "https://git.kernel.org/stable/c/39646d9bcd1a65d2396328026626859a1dab59d7"
            }
          ],
          "title": "net/mlx5e: xsk: Fix crash on regular rq reactivation",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2023-53394",
        "datePublished": "2025-09-18T13:33:35.895Z",
        "dateReserved": "2025-09-17T14:54:09.738Z",
        "dateUpdated": "2026-10-30T12:17:29.409Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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  • 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.
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Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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