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Fencer Intel
high 8.3

CVE-2011-2497 json

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…

published 2011-08-29 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-2484

cvss
8.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.0%
EPSS 2.0% chance of exploitation in 30 days, percentile 80%
public exploits
0
none known

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.

Patch / fix

  • linux linux_kernel 3.0
  • kernel RHEL 6 2.6.32-131.12.1.el6
  • perf RHEL 6 2.6.32-131.12.1.el6
  • kernel-kdump RHEL 6 2.6.32-131.12.1.el6
  • kernel-firmware RHEL 6 2.6.32-131.12.1.el6
  • kernel-bootwrapper RHEL 6 2.6.32-131.12.1.el6
  • kernel-debuginfo-common-i686 RHEL 6 2.6.32-131.12.1.el6
  • kernel-debuginfo-common-ppc64 RHEL 6 2.6.32-131.12.1.el6
  • kernel-debuginfo-common-s390x RHEL 6 2.6.32-131.12.1.el6

red hat advisories RHSA-2011:1189RHSA-2011:1253

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2011-2497 updated cvss 8.3

kernel: bluetooth: buffer overflow in l2cap config request

  • Red Hat Enterprise Linux Server (v. 6) perf 2.6.32-131.12.1.el6, kernel 2.6.32-131.12.1.el6, kernel-kdump 2.6.32-131.12.1.el6, kernel-firmware 2.6.32-131.12.1.el6, kernel-bootwrapper 2.6.32-131.12.1.el6, kernel-debuginfo-common-i686 2.6.32-131.12.1.el6, +3 more
    fixed: vendor fix RHSA-2011:1189
  • Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt 2.6.33.9-rt31.75.el6rt, kernel-rt-trace 2.6.33.9-rt31.75.el6rt, kernel-rt-vanilla 2.6.33.9-rt31.75.el6rt, kernel-rt-firmware 2.6.33.9-rt31.75.el6rt, kernel-rt-debuginfo-common-x86_64 2.6.33.9-rt31.75.el6rt
    fixed: vendor fix RHSA-2011:1253
  • Red Hat Enterprise Linux 4 kernel Red Hat Enterprise Linux 5 kernel
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.97% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 8.3 AV:A/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-191 Integer Underflow (Wrap or Wraparound)
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.