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CVE-2023-53716 (GCVE-0-2023-53716)

Vulnerability from cvelistv5 – Published: 2025-10-22 13:23 – Updated: 2026-05-23 15:30
VLAI
Title
net: fix skb leak in __skb_tstamp_tx()
Summary
In the Linux kernel, the following vulnerability has been resolved: net: fix skb leak in __skb_tstamp_tx() Commit 50749f2dd685 ("tcp/udp: Fix memleaks of sk and zerocopy skbs with TX timestamp.") added a call to skb_orphan_frags_rx() to fix leaks with zerocopy skbs. But it ended up adding a leak of its own. When skb_orphan_frags_rx() fails, the function just returns, leaking the skb it just cloned. Free it before returning. This bug was discovered and resolved using Coverity Static Analysis Security Testing (SAST) by Synopsys, Inc.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 281072fb2a7294cde7acbf5375b879f40a8001b7 , < 82501f1ead557cbee1c2467654ec109a80334d22 (git)
Affected: 1f69c086b20e27763af28145981435423f088268 , < 779332447108545ef04682ea29af5f85c0202aee (git)
Affected: 602fa8af44fd55a58f9e94eb673e8adad2c6cc46 , < 58766252f6b2c0487cda6976a53d2bb03ae28e2a (git)
Affected: 230a5ed7d813fb516de81d23f09d7506753e41e9 , < a594382ec6d0cc8cff5a8bc7e61b54e3858fb243 (git)
Affected: 43e4197dd5f6b474a8b16f8b6a42cd45cf4f9d1a , < e06841a2abf9c82735cee39e88b1d79464088840 (git)
Affected: cb52e7f24c1d01a536a847dff0d1d95889cc3b5c , < cc18b4685910d5d9de8314bae9c55790701b1811 (git)
Affected: 426384dd4980040651536fef5feac4dcc4d7ee4e , < f4d928c00254cfc9dd0ee7076f4a59bceec675f4 (git)
Affected: 50749f2dd6854a41830996ad302aef2ffaf011d8 , < 8a02fb71d7192ff1a9a47c9d937624966c6e09af (git)
Affected: 30290f210ba7426ff7592fe2eb4114b1b5bad219 (git)
Affected: 6.2.15 , < 6.3 (semver)
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Linux Linux Affected: 4.14.315 , < 4.14.316 (semver)
Affected: 4.19.283 , < 4.19.284 (semver)
Affected: 5.4.243 , < 5.4.244 (semver)
Affected: 5.10.180 , < 5.10.181 (semver)
Affected: 5.15.111 , < 5.15.114 (semver)
Affected: 6.1.28 , < 6.1.31 (semver)
Affected: 6.3.2 , < 6.3.5 (semver)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fix skb leak in __skb_tstamp_tx()\n\nCommit 50749f2dd685 (\"tcp/udp: Fix memleaks of sk and zerocopy skbs with\nTX timestamp.\") added a call to skb_orphan_frags_rx() to fix leaks with\nzerocopy skbs. But it ended up adding a leak of its own. When\nskb_orphan_frags_rx() fails, the function just returns, leaking the skb\nit just cloned. Free it before returning.\n\nThis bug was discovered and resolved using Coverity Static Analysis\nSecurity Testing (SAST) by Synopsys, Inc."
        }
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    "dateReserved": "2025-10-22T13:21:37.347Z",
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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-07-21T19:13:14+00:00",
      "cve": "CVE-2023-53716",
      "id": "CVE-2023-53716",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:known_affected": "198",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: Network subsystem memory leak",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-53716.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "low",
      "current_release_date": "2026-08-31T00:56:12Z",
      "cve": "CVE-2023-53716",
      "id": "CVE-2023-53716",
      "initial_release_date": "2025-10-22T23:59:08Z",
      "product_status:known_affected": "374",
      "product_status:known_not_affected": "447",
      "product_status:recommended": "116",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-53716",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-53716.json",
      "version": "16"
    }
  }
}



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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.


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.