CVE-2026-74459 (GCVE-0-2026-74459)

Vulnerability from cvelistv5 – Published: 2026-08-15 12:27 – Updated: 2026-08-19 16:36
VLAI
Title
can: etas_es58x: es58x_read_bulk_callback(): fix RX buffer leak on URB resubmit failure
Summary
In the Linux kernel, the following vulnerability has been resolved: can: etas_es58x: es58x_read_bulk_callback(): fix RX buffer leak on URB resubmit failure es58x_read_bulk_callback() resubmits the RX URB after processing a received packet. If the resubmit succeeds, the URB remains anchored and will be handled by the normal RX path or by teardown. However, if usb_submit_urb() fails, the callback unanchors the URB and then returns directly. This skips the existing free_urb path, so the coherent transfer buffer allocated with usb_alloc_coherent() is not released. Reuse the existing free_urb path after a resubmit failure so that the RX coherent buffer is freed before leaving the callback.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 7a0171b4921ad443fee5ed4fcb9d99fa4776edac , < c7ddf119544eea2d8409e12471c3f9f36ca02e3f (git)
Affected: 2185ea6e4ebcb61d1224dc7d187c59723cb5ad59 , < 21da1a374769751546cc131e58a4d8bd968f57b2 (git)
Affected: f6e90c113c92e83fc0963d5e60e16b0e8a268981 , < 0ef136ba052101243ba117a1aca6f4a4c3a81142 (git)
Affected: b878444519fa03a3edd287d1963cf79ef78be2f1 , < b85e5c310382803d27adf6fe6554d4208bc8951c (git)
Affected: 18eee279e9b5bff0db1aca9475ae4bc12804f05c , < c311f17c261fd375ddf5755f2ebe1f022c19c5b0 (git)
Affected: 5eaad4f768266f1f17e01232ffe2ef009f8129b7 , < 19c6c8c6cd5dd14fab5fcd744584812a57cbb78d (git)
Affected: 5eaad4f768266f1f17e01232ffe2ef009f8129b7 , < 7a0cf2b2497c757c3cb1286eddf2986abb0d387b (git)
Affected: b8f9ca88253574638bcff38900a4c28d570b1919 (git)
Affected: 5.15.203 , < 5.15.216 (semver)
Affected: 6.1.167 , < 6.1.183 (semver)
Affected: 6.6.130 , < 6.6.151 (semver)
Affected: 6.12.77 , < 6.12.103 (semver)
Affected: 6.18.17 , < 6.18.44 (semver)
Affected: 6.19.7 , < 6.20 (semver)
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Linux Linux Affected: 7.0
Unaffected: 0 , < 7.0 (semver)
Unaffected: 5.15.216 , ≤ 5.15.* (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.151 , ≤ 6.6.* (semver)
Unaffected: 6.12.103 , ≤ 6.12.* (semver)
Unaffected: 6.18.44 , ≤ 6.18.* (semver)
Unaffected: 7.1.8 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: etas_es58x: es58x_read_bulk_callback(): fix RX buffer leak on URB resubmit failure\n\nes58x_read_bulk_callback() resubmits the RX URB after processing a received\npacket. If the resubmit succeeds, the URB remains anchored and will be\nhandled by the normal RX path or by teardown.\n\nHowever, if usb_submit_urb() fails, the callback unanchors the URB and then\nreturns directly. This skips the existing free_urb path, so the coherent\ntransfer buffer allocated with usb_alloc_coherent() is not released.\n\nReuse the existing free_urb path after a resubmit failure so that the RX\ncoherent buffer is freed before leaving the callback."
        }
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        "dateUpdated": "2026-08-19T16:36:55.813Z",
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        "shortName": "Linux"
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    "datePublished": "2026-08-15T12:27:00.653Z",
    "dateReserved": "2026-08-15T05:44:03.900Z",
    "dateUpdated": "2026-08-19T16:36:55.813Z",
    "state": "PUBLISHED"
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        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: etas_es58x: es58x_read_bulk_callback(): fix RX buffer leak on URB resubmit failure\n\nes58x_read_bulk_callback() resubmits the RX URB after processing a received\npacket. If the resubmit succeeds, the URB remains anchored and will be\nhandled by the normal RX path or by teardown.\n\nHowever, if usb_submit_urb() fails, the callback unanchors the URB and then\nreturns directly. This skips the existing free_urb path, so the coherent\ntransfer buffer allocated with usb_alloc_coherent() is not released.\n\nReuse the existing free_urb path after a resubmit failure so that the RX\ncoherent buffer is freed before leaving the callback."
          }
        ],
        "id": "CVE-2026-74459",
        "lastModified": "2026-08-19T17:21:02.803",
        "metrics": {},
        "published": "2026-08-15T13:17:50.543",
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          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "redhat_vex": {
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      "current_release_date": "2026-08-21T09:41:58+00:00",
      "cve": "CVE-2026-74459",
      "id": "CVE-2026-74459",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: can: etas_es58x: es58x_read_bulk_callback(): fix RX buffer leak on URB resubmit failure",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74459.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-27T16:51:24Z",
      "cve": "CVE-2026-74459",
      "id": "CVE-2026-74459",
      "initial_release_date": "2026-08-15T23:52:39Z",
      "product_status:known_not_affected": "290",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-74459",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-74459.json",
      "version": "4"
    }
  }
}



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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.



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.