Bluetooth: hci_core: Fix not checking skb length on hci_acldata_packet
Published Dec 27, 2024
7.6
HIGHCVSS 3.1
EPSS 0.29%
Description
This fixes not checking if skb really contains an ACL header otherwise the code may attempt to access some uninitilized/invalid memory past the valid skb->data.
Affected products
-
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version
-
- Version 2.6.12StatusaffectedConstraints-
- Version 0StatusunaffectedConstraints<2.6.12
- Version 5.15.174StatusunaffectedConstraints<=5.15.*
- Version 6.1.120StatusunaffectedConstraints<=6.1.*
- Version 6.12.5StatusunaffectedConstraints<=6.12.*
- Version 6.13StatusunaffectedConstraints<=*
- Version 6.6.66StatusunaffectedConstraints<=6.6.*
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux | unaffected |
| ||||||||||||||||||||||||
| Linux | Linux | affected |
|
- < 5.15.174
- ≥ 5.16 · < 6.1.120
- ≥ 6.2 · < 6.6.66
- ≥ 6.7 · < 6.12.5
No data.
Red Hat Enterprise Linux 9
kernel-0:5.14.0-570.12.1.el9_6
Fixed · RHSA-2025:6966
Red Hat Enterprise Linux 9
kernel-0:5.14.0-570.12.1.el9_6
Fixed · RHSA-2025:6966
Red Hat Enterprise Linux 10
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Not affected
Red Hat Enterprise Linux 8
kernel
Will not fix
Red Hat Enterprise Linux 8
kernel-rt
Not affected
Red Hat Enterprise Linux 9
kernel-rt
Affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 9 | kernel-0:5.14.0-570.12.1.el9_6 | Fixed | RHSA-2025:6966 |
| Red Hat Enterprise Linux 9 | kernel-0:5.14.0-570.12.1.el9_6 | Fixed | RHSA-2025:6966 |
| Red Hat Enterprise Linux 10 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel | Will not fix | n/a |
| Red Hat Enterprise Linux 8 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 9 | kernel-rt | Affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This vulnerability, rated as moderate severity, involves a flaw in the Linux kernel's Bluetooth subsystem. A failure to validate the socket buffer's length before accessing ACL headers can lead to out-of-bounds memory access. This creates a risk of kernel memory corruption, potentially allowing attackers to corrupt kernel memory related to bluetooth networking, which might impact the functionality of connected devices. However, even in situations where an attacker had significant access to and information about a target system, our assessment indicates that the security features of the kernel would prevent a compromise of confidentiality or the ability to escalate their privileges.
Red Hat mitigation
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
2 other sources (CVE.org, Red Hat) ▾
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2024–2026- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (4 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.29% (0.00290) | 19.51th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.22% (0.00218) | 12.07th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.03% (0.00031) | 5.60th | v4 (v2025.03.14) |
| Dec 28, 2024 | 0.04% (0.00045) | 17.41th | v3 (v2023.03.01) |
References (11)
- https://access.redhat.com/security/cve/CVE-2024-56590 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2334486 Issue Tracking
- https://git.kernel.org/stable/c/219960a48771b35a3857a491b955c31d6c33d581 Patch
- https://git.kernel.org/stable/c/3fe288a8214e7dd784d1f9b7c9e448244d316b47 Patch
- https://git.kernel.org/stable/c/559b1c7ac2e212a23b3833d3baf3bd957771d02e Patch
- https://git.kernel.org/stable/c/5e50d12cc6e95e1fde08f5db6992b616f714b0fb Patch
- https://git.kernel.org/stable/c/93a6160dc198ffe5786da8bd8588cfd17f53b29a Patch
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
- https://lore.kernel.org/linux-cve-announce/2024122759-CVE-2024-56590-d4ba@gregkh/T
- https://nvd.nist.gov/vuln/detail/CVE-2024-56590
- https://www.cve.org/CVERecord?id=CVE-2024-56590
Change history (0)
No recorded changes yet.