In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: L2CAP: Fix u8 overflow

By keep sending L2CAP_CONF_REQ packets, chan->num_conf_rsp increases
multiple times and eventually it will wrap around the maximum number
(i.e., 255).
This patch prevents this by adding a boundary check with
L2CAP_MAX_CONF_RSP

Btmon log:
Bluetooth monitor ver 5.64
= Note: Linux version 6.1.0-rc2 (x86_64) 0.264594
= Note: Bluetooth subsystem version 2.22 0.264636
@ MGMT Open: btmon (privileged) version 1.22 {0x0001} 0.272191
= New Index: 00:00:00:00:00:00 (Primary,Virtual,hci0) [hci0] 13.877604
@ RAW Open: 9496 (privileged) version 2.22 {0x0002} 13.890741
= Open Index: 00:00:00:00:00:00 [hci0] 13.900426
(...)
> ACL Data RX: Handle 200 flags 0x00 dlen 1033 #32 [hci0] 14.273106
invalid packet size (12 != 1033)
08 00 01 00 02 01 04 00 01 10 ff ff ............
> ACL Data RX: Handle 200 flags 0x00 dlen 1547 #33 [hci0] 14.273561
invalid packet size (14 != 1547)
0a 00 01 00 04 01 06 00 40 00 00 00 00 00 ........@.....
> ACL Data RX: Handle 200 flags 0x00 dlen 2061 #34 [hci0] 14.274390
invalid packet size (16 != 2061)
0c 00 01 00 04 01 08 00 40 00 00 00 00 00 00 04 ........@.......
> ACL Data RX: Handle 200 flags 0x00 dlen 2061 #35 [hci0] 14.274932
invalid packet size (16 != 2061)
0c 00 01 00 04 01 08 00 40 00 00 00 07 00 03 00 ........@.......
= bluetoothd: Bluetooth daemon 5.43 14.401828
> ACL Data RX: Handle 200 flags 0x00 dlen 1033 #36 [hci0] 14.275753
invalid packet size (12 != 1033)
08 00 01 00 04 01 04 00 40 00 00 00 ........@...

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00007.

Exploitation none

Automatable no

Technical Impact partial

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
Version Status Constraints
f2fcfcd670257236ebf2088bbdf26f6a8ef459fe affected
< 49d5867819ab7c744852b45509e8469839c07e0e
f2fcfcd670257236ebf2088bbdf26f6a8ef459fe affected
< 95f1847a361c7b4bf7d74c06ecb6968455082c1a
f2fcfcd670257236ebf2088bbdf26f6a8ef459fe affected
< ad528fde0702903208d0a79d88d5a42ae3fc235b
f2fcfcd670257236ebf2088bbdf26f6a8ef459fe affected
< 9fdc79b571434af7bc742da40a3405f038b637a7
f2fcfcd670257236ebf2088bbdf26f6a8ef459fe affected
< f3fe6817156a2ad4b06f01afab04638a34d7c9a6
f2fcfcd670257236ebf2088bbdf26f6a8ef459fe affected
< 19a78143961a197de8502f4f29c453b913dc3c29
f2fcfcd670257236ebf2088bbdf26f6a8ef459fe affected
< 5550bbf709c323194881737fd290c4bada9e6ead
f2fcfcd670257236ebf2088bbdf26f6a8ef459fe affected
< bcd70260ef56e0aee8a4fc6cd214a419900b0765
Linux Linux affected
Version Status Constraints
2.6.32 affected
—
0 unaffected
< 2.6.32
4.9.337 unaffected
≤ 4.9.*
4.14.303 unaffected
≤ 4.14.*
4.19.270 unaffected
≤ 4.19.*
5.4.229 unaffected
≤ 5.4.*
5.10.161 unaffected
≤ 5.10.*
5.15.85 unaffected
≤ 5.15.*
6.0.15 unaffected
≤ 6.0.*
6.1 unaffected
≤ *

Configuration 1 [-]

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc8:*:*:*:*:*:*
Package CPE Advisory Released Date
Red Hat Enterprise Linux 8
kernel-0:4.18.0-553.el8_10 cpe:/o:redhat:enterprise_linux:8 RHSA-2024:3138 2024-05-22T00:00:00Z
Red Hat Enterprise Linux 9
kernel-0:5.14.0-427.13.1.el9_4 cpe:/a:redhat:enterprise_linux:9 RHSA-2024:2394 2024-04-30T00:00:00Z
kernel-0:5.14.0-427.13.1.el9_4 cpe:/o:redhat:enterprise_linux:9 RHSA-2024:2394 2024-04-30T00:00:00Z

No data.

Subscriptions

Vendors Products
Linux Subscribe
Linux Kernel Subscribe
Redhat Subscribe
Enterprise Linux Subscribe

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/19a78143961a197de8502f4f29c453b913dc3c29 cve-icon cve-icon
https://git.kernel.org/stable/c/49d5867819ab7c744852b45509e8469839c07e0e cve-icon cve-icon
https://git.kernel.org/stable/c/5550bbf709c323194881737fd290c4bada9e6ead cve-icon cve-icon
https://git.kernel.org/stable/c/95f1847a361c7b4bf7d74c06ecb6968455082c1a cve-icon cve-icon
https://git.kernel.org/stable/c/9fdc79b571434af7bc742da40a3405f038b637a7 cve-icon cve-icon
https://git.kernel.org/stable/c/ad528fde0702903208d0a79d88d5a42ae3fc235b cve-icon cve-icon
https://git.kernel.org/stable/c/bcd70260ef56e0aee8a4fc6cd214a419900b0765 cve-icon cve-icon
https://git.kernel.org/stable/c/f3fe6817156a2ad4b06f01afab04638a34d7c9a6 cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2024102140-CVE-2022-48947-0ab5@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2022-48947 cve-icon
https://www.cve.org/CVERecord?id=CVE-2022-48947 cve-icon
History

Tue, 05 Nov 2024 02:30:00 +0000

Type Values Removed Values Added
First Time appeared Redhat
Redhat enterprise Linux
CPEs cpe:/a:redhat:enterprise_linux:9
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux

Fri, 25 Oct 2024 20:30:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
Weaknesses CWE-190
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc8:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel

Tue, 22 Oct 2024 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 22 Oct 2024 13:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate

Mon, 21 Oct 2024 20:15:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix u8 overflow By keep sending L2CAP_CONF_REQ packets, chan->num_conf_rsp increases multiple times and eventually it will wrap around the maximum number (i.e., 255). This patch prevents this by adding a boundary check with L2CAP_MAX_CONF_RSP Btmon log: Bluetooth monitor ver 5.64 = Note: Linux version 6.1.0-rc2 (x86_64) 0.264594 = Note: Bluetooth subsystem version 2.22 0.264636 @ MGMT Open: btmon (privileged) version 1.22 {0x0001} 0.272191 = New Index: 00:00:00:00:00:00 (Primary,Virtual,hci0) [hci0] 13.877604 @ RAW Open: 9496 (privileged) version 2.22 {0x0002} 13.890741 = Open Index: 00:00:00:00:00:00 [hci0] 13.900426 (...) > ACL Data RX: Handle 200 flags 0x00 dlen 1033 #32 [hci0] 14.273106 invalid packet size (12 != 1033) 08 00 01 00 02 01 04 00 01 10 ff ff ............ > ACL Data RX: Handle 200 flags 0x00 dlen 1547 #33 [hci0] 14.273561 invalid packet size (14 != 1547) 0a 00 01 00 04 01 06 00 40 00 00 00 00 00 ........@..... > ACL Data RX: Handle 200 flags 0x00 dlen 2061 #34 [hci0] 14.274390 invalid packet size (16 != 2061) 0c 00 01 00 04 01 08 00 40 00 00 00 00 00 00 04 ........@....... > ACL Data RX: Handle 200 flags 0x00 dlen 2061 #35 [hci0] 14.274932 invalid packet size (16 != 2061) 0c 00 01 00 04 01 08 00 40 00 00 00 07 00 03 00 ........@....... = bluetoothd: Bluetooth daemon 5.43 14.401828 > ACL Data RX: Handle 200 flags 0x00 dlen 1033 #36 [hci0] 14.275753 invalid packet size (12 != 1033) 08 00 01 00 04 01 04 00 40 00 00 00 ........@...
Title Bluetooth: L2CAP: Fix u8 overflow
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2025-12-23T13:21:14.514Z

Reserved: 2024-08-22T01:27:53.624Z

Link: CVE-2022-48947

cve-icon Vulnrichment

Updated: 2024-10-22T13:22:10.845Z

cve-icon NVD

Status : Analyzed

Published: 2024-10-21T20:15:06.150

Modified: 2024-10-25T20:11:45.473

Link: CVE-2022-48947

cve-icon Redhat

Severity : Moderate

Publid Date: 2024-10-21T00:00:00Z

Links: CVE-2022-48947 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses