CVE-2024-56654: linux
Vulnerability summary
CVE-2024-56654 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.23% chance of exploitation in the next 30 days, higher than 12.6% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 25 · Related 24Timeline
- 27-12-2024PublishedVulnerability first disclosed.
- 05-08-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: Fix using rcu_read_(un)lock while iterating The usage of rcu_read_(un)lock while inside list_for_each_entry_rcu is not safe since for the most part entries fetched this way shall be treated as rcu_dereference: Note that the value returned by rcu_dereference() is valid only within the enclosing RCU read-side critical section [1]_. For example, the following is **not** legal:: rcu_read_lock(); p = rcu_dereference(head.next); rcu_read_unlock(); x = p->address; /* BUG!!! */ rcu_read_lock(); y = p->data; /* BUG!!! */ rcu_read_unlock();
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HDiffers
- NVDNIST5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HDiffers
EPSS trend
Probability
0.23%
Chance of exploitation in the next 30 days
Percentile
13%
Versus all other CVEs
30-day change
0.00 pp
From 0.23% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Ubuntu105 products
- linux< 6.8.0-60.63
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 6.8.0-1029.31
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ a0bfde167b506423111ddb8cd71930497a40fc54, < 0108132d7d76d884e443d18b4f067cdf2811911b | ≥ a0bfde167b506423111ddb8cd71930497a40fc54, < f9ecc90b5d501b3a5a62d0685d5104f934bb0104 | ≥ a0bfde167b506423111ddb8cd71930497a40fc54, < 581dd2dc168fe0ed2a7a5534a724f0d3751c93ae | b475c1109251e30ec21fb574d72a1c71a4ab0039 | 2ccde10127447c1a5caad8469fede945bdb62fdf | ≥ 6.4.16, < 6.5 | ≥ 6.5.3, < 6.6 | 6.6
- linux_kernel≥ 6.4.16, < 6.5 | ≥ 6.5.3, < 6.6.67 | ≥ 6.7, < 6.12.6 | 6.13:rc1 | 6.13:rc2
Debian1 product
- linux< 6.12.6-1
3 vendors · 108 products
