Integer underflow in the l2cap_config_req function in net/bluetooth/l2cap_core.c in the…
Priority MEDIUM 40CWE-191Published · Updated
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- Complete · Complete · Complete
- Fix status
- Fixed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-191 and the CVSS impact.
Summary
Integer underflow in the l2cap_config_req function in net/bluetooth/l2cap_core.c in the Linux kernel before 3.0 allows remote attackers to cause a denial of service (heap memory corruption) or possibly have unspecified other impact via a small command-size value within the command header of a Logical Link Control and Adaptation Protocol (L2CAP) configuration request, leading to a buffer overflow.
Why it matters now
EPSS 0.01974 80th percentileScored 2026-11-07
Fix Fixed Red Hat: 2 advisories
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
Red Hat 2 advisories
- RHSA-2011:1253 Released 2011-09-12 · Red Hat rating Importantkernel-rt security and bug fix update
- Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt-2.6.33.9-rt31.75.el6rt, kernel-rt-debug-2.6.33.9-rt31.75.el6rt, kernel-rt-debug-devel-2.6.33.9-rt31.75.el6rt +7
- RHSA-2011:1189 Released 2011-08-23 · Red Hat rating Importantkernel security, bug fix, and enhancement update
- Red Hat Enterprise Linux Server (v. 6) kernel-2.6.32-131.12.1.el6, kernel-bootwrapper-2.6.32-131.12.1.el6, kernel-debug-2.6.32-131.12.1.el6 +8
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux Server (v. 6) | Fixed | RHSA-2011:1189 |
| Red Hat MRG Realtime for RHEL 6 Server v.2 | Fixed | RHSA-2011:1253 |
Not affected: 2 products
- Red Hat Enterprise Linux 4
- Red Hat Enterprise Linux 5
Timeline
- 2026-10-02 Threatist record created from CVE-2011-2497
- 2026-10-03 Alias added: GHSA-65mg-fq5m-qr37
References
Patch 5
- [oss-security] 20110624 CVE request: kernel: remote buffer overflow in bluetooth
- [linux-kernel] 20110624 [PATCH] Bluetooth: Prevent buffer overflow in l2cap config request
- 8359
- [oss-security] 20110627 Re: CVE request: kernel: remote buffer overflow in bluetooth
- https://bugzilla.redhat.com/show_bug.cgi?id=716805
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- TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
- TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2011-2497 · CVE Program
- CVE-2011-2497 · NVD
- FIRST EPSS
- GHSA-65mg-fq5m-qr37 · GitHub Advisory Database · CC BY 4.0
- CVE-2011-2497 · Red Hat security data · CC BY 4.0
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