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

Vulnerability from cvelistv5 – Published: 2024-06-21 10:18 – Updated: 2025-11-03 21:55
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.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: b5b73b26b3ca34574124ed7ae9c5ba8391a7f176 , < 34d83c3e6e97867ae061d14eb52123404aab1cbc (git)
Affected: b5b73b26b3ca34574124ed7ae9c5ba8391a7f176 , < b939d1e04a90248b4cdf417b0969c270ceb992b2 (git)
Affected: b5b73b26b3ca34574124ed7ae9c5ba8391a7f176 , < 91f249b01fe490fce11fbb4307952ca8cce78724 (git)
Affected: b5b73b26b3ca34574124ed7ae9c5ba8391a7f176 , < fb66df20a7201e60f2b13d7f95d031b31a8831d3 (git)
Affected: 83bd58952b2b8543d8c48d1453975ab47a0a7504 (git)
Affected: 817ff50796c5e364c879596509f83fcba194bb6f (git)
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    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)
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Sightings

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  • 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.