CVE-2024-27073 (GCVE-0-2024-27073)

Vulnerability from cvelistv5 – Published: 2024-05-01 13:04 – Updated: 2026-08-05 11:29
VLAI
Title
media: ttpci: fix two memleaks in budget_av_attach
Summary
In the Linux kernel, the following vulnerability has been resolved: media: ttpci: fix two memleaks in budget_av_attach When saa7146_register_device and saa7146_vv_init fails, budget_av_attach should free the resources it allocates, like the error-handling of ttpci_budget_init does. Besides, there are two fixme comment refers to such deallocations.
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 2024-06-06 18:09 UTC
CWE
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6667 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < af37aed04997e644f7e1b52b696b62dcae3cc016 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 910363473e4bf97da3c350e08d915546dd6cc30b (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 24e51d6eb578b82ff292927f14b9f5ec05a46beb (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 55ca0c7eae8499bb96f4e5d9b26af95e89c4e6a0 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7393c681f9aa05ffe2385e8716989565eed2fe06 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 1597cd1a88cfcdc4bf8b1b44cd458fed9a5a5d63 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 656b8cc123d7635dd399d9f02594f27aa797ac3c (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < d0b07f712bf61e1a3cf23c87c663791c42e50837 (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.4.273 , ≤ 5.4.* (semver)
Unaffected: 5.10.214 , ≤ 5.10.* (semver)
Unaffected: 5.15.153 , ≤ 5.15.* (semver)
Unaffected: 6.1.83 , ≤ 6.1.* (semver)
Unaffected: 6.6.23 , ≤ 6.6.* (semver)
Unaffected: 6.7.11 , ≤ 6.7.* (semver)
Unaffected: 6.8.2 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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                  "value": "AV:L - The vulnerable code is a PCI probe-time attach callback, and the resulting dangling state is exercised through local device files (/dev/dvb/adapterN/demux0, dvr0, dvbnet); there is no remote or adjacent-network path into budget_av_attach.\nAC:L - Once the failure branch has been taken, the attacker deterministically drives the use-after-free by opening the still-registered dvr0/demux0 node and starting a feed, with no race to win and unlimited retries.\nPR:L - Reaching the stale DVB character devices requires only an unprivileged local account with access to /dev/dvb, which is the norm for the video group on desktops and for the media/DVB application account on the set-top-box and embedded systems that carry these ttpci cards.\nUI:N - No victim action is needed; the leaked and dangling registrations are created automatically during driver probe and remain live until reboot.\nS:U - The freed saa7146_dev object, the leaked budget_av allocation and the orphaned DVB/i2c registrations all live inside the kernel\u0027s own security authority, crossing no VM, IOMMU or sandbox boundary.\nC:H - budget-\u003edev is left pointing at kmem_cache memory freed by saa7146_init_one\u0027s error path, so subsequent demux/dvr operations read attacker-groomable freed slab contents (including the dev-\u003emem MMIO pointer), a use-after-free that can be leveraged for kernel information disclosure.\nI:H - start_ts_capture() performs saa7146_write() through the freed device\u0027s dev-\u003emem pointer, so an attacker who reclaims that slab controls the destination of kernel writel() operations, yielding a write primitive suitable for control-flow hijacking.\nA:H - Beyond the unbounded leak of the budget_av allocation, the DMA page table and the pinned module reference, any access to the orphaned demux/dvr/dvbnet nodes dereferences freed memory and performs MMIO through an iounmap\u0027d mapping, reliably oopsing or panicking the kernel."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-05T11:29:22.792Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/af37aed04997e644f7e1b52b696b62dcae3cc016"
            },
            {
              "url": "https://git.kernel.org/stable/c/910363473e4bf97da3c350e08d915546dd6cc30b"
            },
            {
              "url": "https://git.kernel.org/stable/c/24e51d6eb578b82ff292927f14b9f5ec05a46beb"
            },
            {
              "url": "https://git.kernel.org/stable/c/55ca0c7eae8499bb96f4e5d9b26af95e89c4e6a0"
            },
            {
              "url": "https://git.kernel.org/stable/c/7393c681f9aa05ffe2385e8716989565eed2fe06"
            },
            {
              "url": "https://git.kernel.org/stable/c/1597cd1a88cfcdc4bf8b1b44cd458fed9a5a5d63"
            },
            {
              "url": "https://git.kernel.org/stable/c/656b8cc123d7635dd399d9f02594f27aa797ac3c"
            },
            {
              "url": "https://git.kernel.org/stable/c/d0b07f712bf61e1a3cf23c87c663791c42e50837"
            }
          ],
          "title": "media: ttpci: fix two memleaks in budget_av_attach",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2024-27073",
        "datePublished": "2024-05-01T13:04:37.653Z",
        "dateReserved": "2024-02-19T14:20:24.216Z",
        "dateUpdated": "2026-08-05T11:29:22.792Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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