CVE-2024-42132: bluetooth/hci: disallow setting handle bigger than HCI_CONN_HANDLE_MAX
Vulnerability summary
CVE-2024-42132 is a high (CVSS 7.6) Release of Invalid Pointer or Reference vulnerability in linux. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 21.6% of scored vulnerabilities.
Not severe (CVSS 7.6, adjacent network); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 18 · Related 15Timeline
- 30-07-2024PublishedVulnerability first disclosed.
- 05-08-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: bluetooth/hci: disallow setting handle bigger than HCI_CONN_HANDLE_MAX Syzbot hit warning in hci_conn_del() caused by freeing handle that was not allocated using ida allocator. This is caused by handle bigger than HCI_CONN_HANDLE_MAX passed by hci_le_big_sync_established_evt(), which makes code think it's unset connection. Add same check for handle upper bound as in hci_conn_set_handle() to prevent warning.
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated7.6HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
- OSV · DebianEcosystem advisory · calculated7.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:HDiffers
- NVDNIST7.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:HDiffers
EPSS trend
Probability
0.29%
Chance of exploitation in the next 30 days
Percentile
22%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.29% 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 causeAffected systems
Known conditions: adjacent network, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu93 products
- linux< 6.8.0-48.48
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 6.8.0-1018.20
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ f7e83f2278f06b577e3c92ea2f4e8e8c6fc72a8f, < 2ae8d7742a09c275872e670c53337b3dcedaa11c | ≥ 84cb0143fb8a03bf941c7aaedd56c938c99dafad, < 4970e48f83dbd21d2a6a7cdaaafc2a71f7f45dc4 | ≥ 181a42edddf51d5d9697ecdf365d72ebeab5afb0, < d311036696fed778301d08a71a4bef737b86d8c5 | ≥ 181a42edddf51d5d9697ecdf365d72ebeab5afb0, < 1cc18c2ab2e8c54c355ea7c0423a636e415a0c23 | e9f708beada55426c8d678e2f46af659eb5bf4f0 | ≥ 6.6.2, < 6.6.39 | ≥ 6.5.12, < 6.6 | 6.7
- linux_kernel≥ 6.5.12, < 6.6 | ≥ 6.6.2, < 6.6.39 | ≥ 6.7, < 6.9.9 | 6.10:rc1 | 6.10:rc2 | 6.10:rc3 | 6.10:rc4 | 6.10:rc5 | 6.10:rc6
Debian1 product
- linux< 6.9.9-1
3 vendors · 96 products
