CVE-2024-36244 (GCVE-0-2024-36244)

Vulnerability from cvelistv5 – Published: 2024-06-21 10:18 – Updated: 2026-05-23 15:46
VLAI
Title
net/sched: taprio: extend minimum interval restriction to entire cycle too
Summary
In the Linux kernel, the following vulnerability has been resolved: net/sched: taprio: extend minimum interval restriction to entire cycle too It is possible for syzbot to side-step the restriction imposed by the blamed commit in the Fixes: tag, because the taprio UAPI permits a cycle-time different from (and potentially shorter than) the sum of entry intervals. We need one more restriction, which is that the cycle time itself must be larger than N * ETH_ZLEN bit times, where N is the number of schedule entries. This restriction needs to apply regardless of whether the cycle time came from the user or was the implicit, auto-calculated value, so we move the existing "cycle == 0" check outside the "if "(!new->cycle_time)" branch. This way covers both conditions and scenarios. Add a selftest which illustrates the issue triggered by syzbot.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 17:09 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6637 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: b5b73b26b3ca34574124ed7ae9c5ba8391a7f176 , < 34d83c3e6e97867ae061d14eb52123404aab1cbc (git)
Affected: b5b73b26b3ca34574124ed7ae9c5ba8391a7f176 , < b939d1e04a90248b4cdf417b0969c270ceb992b2 (git)
Affected: b5b73b26b3ca34574124ed7ae9c5ba8391a7f176 , < 91f249b01fe490fce11fbb4307952ca8cce78724 (git)
Affected: b5b73b26b3ca34574124ed7ae9c5ba8391a7f176 , < fb66df20a7201e60f2b13d7f95d031b31a8831d3 (git)
Affected: 83bd58952b2b8543d8c48d1453975ab47a0a7504 (git)
Affected: 817ff50796c5e364c879596509f83fcba194bb6f (git)
Affected: 5.4.68 , < 5.5 (semver)
Affected: 5.8.12 , < 5.9 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 5.9
Unaffected: 0 , < 5.9 (semver)
Unaffected: 6.1.119 , ≤ 6.1.* (semver)
Unaffected: 6.6.33 , ≤ 6.6.* (semver)
Unaffected: 6.9.4 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (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\nnet/sched: taprio: extend minimum interval restriction to entire cycle too\n\nIt is possible for syzbot to side-step the restriction imposed by the\nblamed commit in the Fixes: tag, because the taprio UAPI permits a\ncycle-time different from (and potentially shorter than) the sum of\nentry intervals.\n\nWe need one more restriction, which is that the cycle time itself must\nbe larger than N * ETH_ZLEN bit times, where N is the number of schedule\nentries. This restriction needs to apply regardless of whether the cycle\ntime came from the user or was the implicit, auto-calculated value, so\nwe move the existing \"cycle == 0\" check outside the \"if \"(!new-\u003ecycle_time)\"\nbranch. This way covers both conditions and scenarios.\n\nAdd a selftest which illustrates the issue triggered by syzbot."
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            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net/sched: taprio: extiende la restricci\u00f3n de intervalo m\u00ednimo a todo el ciclo tambi\u00e9n. Es posible que syzbot eluda la restricci\u00f3n impuesta por el commit culpable en la etiqueta Fixes:, porque el taprio UAPI permite un tiempo de ciclo diferente (y potencialmente m\u00e1s corto) de la suma de los intervalos de entrada. Necesitamos una restricci\u00f3n m\u00e1s, que es que el tiempo del ciclo en s\u00ed debe ser mayor que N * ETH_ZLEN bits, donde N es el n\u00famero de entradas de programaci\u00f3n. Esta restricci\u00f3n debe aplicarse independientemente de si el tiempo del ciclo provino del usuario o fue un valor impl\u00edcito calculado autom\u00e1ticamente, por lo que movemos la verificaci\u00f3n \"ciclo == 0\" existente fuera de \"if \"(!new-\u0026gt;cycle_time)\". rama. De esta manera cubre tanto las condiciones como los escenarios. Agregue una autoprueba que ilustre el problema desencadenado por syzbot."
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}



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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.
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  • 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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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