CVE-2024-36244: net/sched: taprio: extend minimum interval restriction to entire cycle too
Vulnerability summary
CVE-2024-36244 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.25% chance of exploitation in the next 30 days, higher than 15.9% of scored vulnerabilities.
Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 25 · Related 18Timeline
- 21-06-2024PublishedVulnerability first disclosed.
- 23-05-2026Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.25%
Chance of exploitation in the next 30 days
Percentile
16%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.25% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu125 products
- linuxAll versions (No fix recorded) | < 6.8.0-44.44
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 6.8.0-1015.16
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ b5b73b26b3ca34574124ed7ae9c5ba8391a7f176, < 34d83c3e6e97867ae061d14eb52123404aab1cbc | ≥ b5b73b26b3ca34574124ed7ae9c5ba8391a7f176, < b939d1e04a90248b4cdf417b0969c270ceb992b2 | ≥ b5b73b26b3ca34574124ed7ae9c5ba8391a7f176, < 91f249b01fe490fce11fbb4307952ca8cce78724 | ≥ b5b73b26b3ca34574124ed7ae9c5ba8391a7f176, < fb66df20a7201e60f2b13d7f95d031b31a8831d3 | 83bd58952b2b8543d8c48d1453975ab47a0a7504 | 817ff50796c5e364c879596509f83fcba194bb6f | ≥ 5.4.68, < 5.5 | ≥ 5.8.12, < 5.9 | 5.9
- linux_kernel≥ 5.4.68, < 5.5 | ≥ 5.8.12, < 5.9 | ≥ 5.9.1, < 6.1.119 | ≥ 6.2, < 6.6.33 | ≥ 6.7, < 6.9.4 | 5.9 | 5.9:rc7 | 5.9:rc8 | 6.10:rc1
Debian1 product
- linux< 6.1.119-1 | < 6.9.7-1
3 vendors · 128 products
