Bluetooth: MGMT: Fix OOB access in parse_adv_monitor_pattern()
Key facts
- Attack vector
- —
- Privileges required
- —
- User interaction
- —
- Attack complexity
- —
- Impact type
- —
- Confidentiality · integrity · availability
- —
- Fix status
- Partial Red Hat: 25 fixed, 1 without a fix
No CVSS vector from any source. Fix status from CNA and Red Hat.
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: Fix OOB access in parse_adv_monitor_pattern() In the parse_adv_monitor_pattern() function, the value of the 'length' variable is currently limited to HCI_MAX_EXT_AD_LENGTH(251). The size of the 'value' array in the mgmt_adv_pattern structure is 31. If the value of 'pattern[i].length' is set in the user space and exceeds 31, the 'patterns[i].value' array can be accessed out of bound when copied. Increasing the size of the 'value' array in the 'mgmt_adv_pattern' structure will break the userspace. Considering this, and to avoid OOB access revert the limits for 'offset' and 'length' back to the value of HCI_MAX_AD_LENGTH. Found by InfoTeCS on behalf of Linux Verification Center (linuxtesting.org) with SVACE.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 6.1.159
- Fix · CNA Linux (Linux) Fixed in 6.1.159, 6.6.117, 6.12.58, 6.17.8, 6.18
Red Hat 5 advisories
- RHSA-2026:2761 Released 2026-02-16 · Red Hat rating Moderatekernel security update
- Red Hat Enterprise Linux AppStream EUS (v. 10.0) kernel-64k-debug-devel-6.12.0-55.60.1.el10_0, kernel-64k-debug-devel-matched-6.12.0-55.60.1.el10_0, kernel-64k-devel-6.12.0-55.60.1.el10_0 +12
- Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel-6.12.0-55.60.1.el10_0, kernel-64k-6.12.0-55.60.1.el10_0, kernel-64k-core-6.12.0-55.60.1.el10_0 +28
- Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) kernel-tools-libs-devel-6.12.0-55.60.1.el10_0, libperf-6.12.0-55.60.1.el10_0
- Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt-6.12.0-55.60.1.el10_0, kernel-rt-64k-6.12.0-55.60.1.el10_0, kernel-rt-64k-core-6.12.0-55.60.1.el10_0 +21
- Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt-6.12.0-55.60.1.el10_0, kernel-rt-core-6.12.0-55.60.1.el10_0, kernel-rt-debug-6.12.0-55.60.1.el10_0 +11
- RHSA-2026:2594 Released 2026-02-12 · Red Hat rating Moderatekernel security update
- Red Hat CodeReady Linux Builder EUS (v.9.4) kernel-tools-libs-devel-5.14.0-427.110.1.el9_4, libperf-5.14.0-427.110.1.el9_4
- Red Hat Enterprise Linux AppStream EUS (v.9.4) kernel-64k-debug-devel-5.14.0-427.110.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.110.1.el9_4, kernel-64k-devel-5.14.0-427.110.1.el9_4 +11
- Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool-7.3.0-427.110.1.el9_4, kernel-5.14.0-427.110.1.el9_4, kernel-64k-5.14.0-427.110.1.el9_4 +29
- Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt-5.14.0-427.110.1.el9_4, kernel-rt-core-5.14.0-427.110.1.el9_4, kernel-rt-debug-5.14.0-427.110.1.el9_4 +9
- Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4) kernel-rt-5.14.0-427.110.1.el9_4, kernel-rt-core-5.14.0-427.110.1.el9_4, kernel-rt-debug-5.14.0-427.110.1.el9_4 +11
- RHSA-2026:2352 Released 2026-02-09 · Red Hat rating Moderatekernel security update
- Red Hat CodeReady Linux Builder EUS (v.9.6) kernel-tools-libs-devel-5.14.0-570.86.1.el9_6, libperf-5.14.0-570.86.1.el9_6
- Red Hat Enterprise Linux AppStream EUS (v.9.6) kernel-64k-debug-devel-5.14.0-570.86.1.el9_6, kernel-64k-debug-devel-matched-5.14.0-570.86.1.el9_6, kernel-64k-devel-5.14.0-570.86.1.el9_6 +12
- Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel-5.14.0-570.86.1.el9_6, kernel-64k-5.14.0-570.86.1.el9_6, kernel-64k-core-5.14.0-570.86.1.el9_6 +28
- Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt-5.14.0-570.86.1.el9_6, kernel-rt-64k-5.14.0-570.86.1.el9_6, kernel-rt-64k-core-5.14.0-570.86.1.el9_6 +21
- Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt-5.14.0-570.86.1.el9_6, kernel-rt-core-5.14.0-570.86.1.el9_6, kernel-rt-debug-5.14.0-570.86.1.el9_6 +11
Show 2 more Red Hat advisories
- RHSA-2026:1690 Released 2026-02-02 · Red Hat rating Importantkernel security update
- Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-124.31.1.el10_1, kernel-64k-debug-devel-matched-6.12.0-124.31.1.el10_1, kernel-64k-devel-6.12.0-124.31.1.el10_1 +12
- Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-124.31.1.el10_1, kernel-64k-6.12.0-124.31.1.el10_1, kernel-64k-core-6.12.0-124.31.1.el10_1 +29
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-124.31.1.el10_1, libperf-6.12.0-124.31.1.el10_1
- Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-124.31.1.el10_1, kernel-rt-64k-6.12.0-124.31.1.el10_1, kernel-rt-64k-core-6.12.0-124.31.1.el10_1 +21
- Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-124.31.1.el10_1, kernel-rt-core-6.12.0-124.31.1.el10_1, kernel-rt-debug-6.12.0-124.31.1.el10_1 +9
- RHSA-2026:1143 Released 2026-01-26 · Red Hat rating Importantkernel security update
- Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-611.26.1.el9_7, kernel-64k-debug-devel-matched-5.14.0-611.26.1.el9_7, kernel-64k-devel-5.14.0-611.26.1.el9_7 +12
- Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-611.26.1.el9_7, kernel-64k-5.14.0-611.26.1.el9_7, kernel-64k-core-5.14.0-611.26.1.el9_7 +28
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-611.26.1.el9_7, libperf-5.14.0-611.26.1.el9_7
- Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-611.26.1.el9_7, kernel-rt-64k-5.14.0-611.26.1.el9_7, kernel-rt-64k-core-5.14.0-611.26.1.el9_7 +21
- Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-611.26.1.el9_7, kernel-rt-core-5.14.0-611.26.1.el9_7, kernel-rt-debug-5.14.0-611.26.1.el9_7 +9
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 9 | Affected | No fix yet |
| Red Hat CodeReady Linux Builder EUS (v.9.4) | Fixed | RHSA-2026:2594 |
| Red Hat CodeReady Linux Builder EUS (v.9.6) | Fixed | RHSA-2026:2352 |
| Red Hat Enterprise Linux AppStream (v. 10) | Fixed | RHSA-2026:1690 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2026:1143 |
| Red Hat Enterprise Linux AppStream EUS (v. 10.0) | Fixed | RHSA-2026:2761 |
| Red Hat Enterprise Linux AppStream EUS (v.9.4) | Fixed | RHSA-2026:2594 |
| Red Hat Enterprise Linux AppStream EUS (v.9.6) | Fixed | RHSA-2026:2352 |
| Red Hat Enterprise Linux BaseOS (v. 10) | Fixed | RHSA-2026:1690 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2026:1143 |
| Red Hat Enterprise Linux BaseOS EUS (v. 10.0) | Fixed | RHSA-2026:2761 |
| Red Hat Enterprise Linux BaseOS EUS (v.9.4) | Fixed | RHSA-2026:2594 |
| Red Hat Enterprise Linux BaseOS EUS (v.9.6) | Fixed | RHSA-2026:2352 |
| Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) | Fixed | RHSA-2026:1690 |
| Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) | Fixed | RHSA-2026:1143 |
| Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) | Fixed | RHSA-2026:2761 |
| Red Hat Enterprise Linux Real Time (v. 10) | Fixed | RHSA-2026:1690 |
| Red Hat Enterprise Linux Real Time (v. 9) | Fixed | RHSA-2026:1143 |
| Red Hat Enterprise Linux Real Time EUS (v. 10.0) | Fixed | RHSA-2026:2761 |
| Red Hat Enterprise Linux Real Time EUS (v.9.4) | Fixed | RHSA-2026:2594 |
| Red Hat Enterprise Linux Real Time EUS (v.9.6) | Fixed | RHSA-2026:2352 |
| Red Hat Enterprise Linux Real Time for NFV (v. 10) | Fixed | RHSA-2026:1690 |
| Red Hat Enterprise Linux Real Time for NFV (v. 9) | Fixed | RHSA-2026:1143 |
| Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) | Fixed | RHSA-2026:2761 |
| Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4) | Fixed | RHSA-2026:2594 |
| Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) | Fixed | RHSA-2026:2352 |
Not affected: 3 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
Timeline
- 2026-10-02 Threatist record created from CVE-2025-40294
- 2026-10-03 Alias added: GHSA-23g6-rffg-7f3p
References
Other 5
- https://git.kernel.org/stable/c/96616530f524a0a76248cd44201de0a9e8526190
- https://git.kernel.org/stable/c/5f7350ff2b179764a4f40ba4161b60b8aaef857b
- https://git.kernel.org/stable/c/4b7d4aa5399b5a64caee639275615c63c008540d
- https://git.kernel.org/stable/c/3a50d59b3781bc3a4e96533612509546a4c309a7
- https://git.kernel.org/stable/c/8d59fba49362c65332395789fd82771f1028d87e
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Sources
- CVE-2025-40294 · CVE Program
- CVE-2025-40294 · NVD
- FIRST EPSS
- GHSA-23g6-rffg-7f3p · GitHub Advisory Database · CC BY 4.0
- CVE-2025-40294 · Red Hat security data · CC BY 4.0
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