CVE-2024-53206 (GCVE-0-2024-53206)

Vulnerability from cvelistv5 – Published: 2024-12-27 13:49 – Updated: 2026-08-05 11:44
VLAI
Title
tcp: Fix use-after-free of nreq in reqsk_timer_handler().
Summary
In the Linux kernel, the following vulnerability has been resolved: tcp: Fix use-after-free of nreq in reqsk_timer_handler(). The cited commit replaced inet_csk_reqsk_queue_drop_and_put() with __inet_csk_reqsk_queue_drop() and reqsk_put() in reqsk_timer_handler(). Then, oreq should be passed to reqsk_put() instead of req; otherwise use-after-free of nreq could happen when reqsk is migrated but the retry attempt failed (e.g. due to timeout). Let's pass oreq to reqsk_put().
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-11 15:43 UTC
CWE
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6653 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 8459d61fbf24967839a70235165673148c7c7f17 , < 2dcc86fefe09ac853158afd96b60d544af115dc5 (git)
Affected: 5071beb59ee416e8ab456ac8647a4dabcda823b1 , < 9a3c1ad93e6fba67b3a637cfa95a57a6685e4908 (git)
Affected: 997ae8da14f1639ce6fb66a063dab54031cd61b3 , < 65ed89cad1f57034c256b016e89e8c0a4ec7c65b (git)
Affected: 51e34db64f4e43c7b055ccf881b7f3e0c31bb26d , < d0eb14cb8c08b00c36a3d5dc57a6f428b301f721 (git)
Affected: e8c526f2bdf1845bedaf6a478816a3d06fa78b8f , < 6d845028609a4af0ad66f499ee0bd5789122b067 (git)
Affected: e8c526f2bdf1845bedaf6a478816a3d06fa78b8f , < c31e72d021db2714df03df6c42855a1db592716c (git)
Affected: 106e457953315e476b3642ef24be25ed862aaba3 (git)
Affected: c964bf65f80a14288d767023a1b300b30f5b9cd0 (git)
Affected: 5.15.170 , < 5.15.174 (semver)
Affected: 6.1.115 , < 6.1.120 (semver)
Affected: 6.6.59 , < 6.6.64 (semver)
Affected: 6.11.6 , < 6.11.11 (semver)
Affected: 5.4.293 , < 5.5 (semver)
Affected: 5.10.237 , < 5.11 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 6.12
Unaffected: 0 , < 6.12 (semver)
Unaffected: 5.15.174 , ≤ 5.15.* (semver)
Unaffected: 6.1.120 , ≤ 6.1.* (semver)
Unaffected: 6.6.64 , ≤ 6.6.* (semver)
Unaffected: 6.11.11 , ≤ 6.11.* (semver)
Unaffected: 6.12.2 , ≤ 6.12.* (semver)
Unaffected: 6.13 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: Fix use-after-free of nreq in reqsk_timer_handler().\n\nThe cited commit replaced inet_csk_reqsk_queue_drop_and_put() with\n__inet_csk_reqsk_queue_drop() and reqsk_put() in reqsk_timer_handler().\n\nThen, oreq should be passed to reqsk_put() instead of req; otherwise\nuse-after-free of nreq could happen when reqsk is migrated but the\nretry attempt failed (e.g. due to timeout).\n\nLet\u0027s pass oreq to reqsk_put()."
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            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tcp: Se corrige el use-after-free de nreq en reqsk_timer_handler(). el commit citada reemplaz\u00f3 inet_csk_reqsk_queue_drop_and_put() con __inet_csk_reqsk_queue_drop() y reqsk_put() en reqsk_timer_handler(). Luego, oreq se debe pasar a reqsk_put() en lugar de req; de lo contrario, el use-after-free de nreq podr\u00eda ocurrir cuando se migra reqsk pero el intento de reintento falla (por ejemplo, debido al tiempo de espera). Pasemos oreq a reqsk_put()."
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            "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
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      "current_release_date": "2026-11-05T13:27:31+00:00",
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      "product_status:known_not_affected": "197",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: tcp: Fix use-after-free of nreq in reqsk_timer_handler().",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-53206.json",
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}



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Tags
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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.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
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Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

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