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Review reviewHigh

CVE-2024-49950

Linux Linux, debian linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix uaf in l2cap_connect [Syzbot reported] BUG: KASAN: slab-use-after-free in l2cap_connect.constprop.0+0x10d8/0x1270 net/bluetooth/l2cap_core.c:3949 Read of size 8 at addr ffff8880241e9800 by task kworker/u9:0/54 CPU: 0 UID: 0 PID: 54 Comm: kworker/u9:0 Not tainted 6.11.0-rc6-syzkaller-00268-g788220eee30d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Workqueue: hci2 hci_rx_work Call Trace: <TASK> __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x116/...

CVSS
7.8
EPSS
-
- percentile
CISA KEV
Not listed
Published
2024.10.22
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix uaf in l2cap_connect [Syzbot reported] BUG: KASAN: slab-use-after-free in l2cap_connect.constprop.0+0x10d8/0x1270 net/bluetooth/l2cap_core.c:3949 Read of size 8 at addr ffff8880241e9800 by task kworker/u9:0/54 CPU: 0 UID: 0 PID: 54 Comm: kworker/u9:0 Not tainted 6.11.0-rc6-syzkaller-00268-g788220eee30d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Workqueue: hci2 hci_rx_work Call Trace: <TASK> __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x116/...

Affected product and versions

Product
Linux Linux, debian linux, linux kernel
Affected versions
>= 7b064edae38d62d8587a8c574f93b53ce75ae749 < 686e05c9dbd68766c6bda5f31f7e077f36a7fb29, >= 7b064edae38d62d8587a8c574f93b53ce75ae749 < b22346eec479a30bfa4a02ad2c551b54809694d0, >= 7b064edae38d62d8587a8c574f93b53ce75ae749 < b90907696c30172b809aa3dd2f0caffae761e4c6, >= 7b064edae38d62d8587a8c574f93b53ce75ae749 < 78d30ce16fdf9c301bcd8b83ce613cea079cea83, >= 7b064edae38d62d8587a8c574f93b53ce75ae749 < a1c6174e23df10b8e5770e82d63bc6e2118a3dc7, >= 7b064edae38d62d8587a8c574f93b53ce75ae749 < 333b4fd11e89b29c84c269123f871883a30be586, >= 3.8, 11.0, >= 3.8 < 5.15.174, >= 5.16 < 6.1.118, >= 6.2 < 6.6.55, >= 6.7 < 6.10.14, >= 6.11 < 6.11.3
Fixed versions
5.15.174, 6.1.118, 6.6.55, 6.10.14, 6.11.3

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, debian linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-416
CVE-2024-49950 — Linux Linux, debian linux, linux kernel | SECUFOCUS NOW