CVE-2024-36244
MediumIn 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.
CVSS 3.1 score
5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
References
The following references provide additional information about CVE-2024-36244 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/34d83c3e6e97867ae061d14eb52123404aab1cbc
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PatchKernel patch commithttps://git.kernel.org/stable/c/91f249b01fe490fce11fbb4307952ca8cce78724
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PatchKernel patch commithttps://git.kernel.org/stable/c/b939d1e04a90248b4cdf417b0969c270ceb992b2
Frequently asked questions
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What is CVE-2024-36244?
CVE-2024-36244 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . CVE-2024-36244 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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What is the CVSS score for CVE-2024-36244?
CVE-2024-36244 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H. -
Is there a patch available for CVE-2024-36244?
No patch is currently available for CVE-2024-36244. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
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Is CVE-2024-36244 actively exploited?
No — CVE-2024-36244 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.