CVE-2024-42132 | bluetooth/hci: disallow setting handle bigger than HCI_CONN_HANDLE_MAX

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.

Published: 2024-07-30 Last update: 2024-12-11 Assigner: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-42132 is rated Low Risk (29.1/100): CVSS High severity, with low exploitation likelihood (EPSS 0.01%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2024-42132

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 0.07% 0.01% -0.06%
2 2025-11-18 0.03% 0.07% +0.04%
3 2025-04-15 — 0.03% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-42132

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.1 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.2 [email protected]

Weakness enumeration for CVE-2024-42132

OS Trackers for CVE-2024-42132

vendor priority summary link
debian unimportant CVE-2024-42132 unimportant priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2024-42132
redhat low — https://access.redhat.com/security/cve/CVE-2024-42132
suse medium — https://www.suse.com/security/cve/CVE-2024-42132/
ubuntu medium CVE-2024-42132 medium priority: Ubuntu including 126 source packages (linux, linux-allwinner-5.19, …), 1008 status rows across 8 suites (bionic, focal, jammy, noble, oracular, trusty, upstream, xenial): DNE 690, ignored 141, not-affected 91, released 86. https://ubuntu.com/security/CVE-2024-42132

Affected software / configurations for CVE-2024-42132

Vendor Product Version Raw CPE
linux linux_kernel >= 6.5.12, < 6.6 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 6.6.2, < 6.6.39 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 6.7, < 6.9.9 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel 6.10 cpe:2.3:o:linux:linux_kernel:6.10:rc1:*:*:*:*:*:*
linux linux_kernel 6.10 cpe:2.3:o:linux:linux_kernel:6.10:rc2:*:*:*:*:*:*
linux linux_kernel 6.10 cpe:2.3:o:linux:linux_kernel:6.10:rc3:*:*:*:*:*:*
linux linux_kernel 6.10 cpe:2.3:o:linux:linux_kernel:6.10:rc4:*:*:*:*:*:*
linux linux_kernel 6.10 cpe:2.3:o:linux:linux_kernel:6.10:rc5:*:*:*:*:*:*
linux linux_kernel 6.10 cpe:2.3:o:linux:linux_kernel:6.10:rc6:*:*:*:*:*:*

References for CVE-2024-42132

cvelogic Threat Intelligence