CVE-2022-48947

Advisory lineage Upstream: 0 Downstream: 12
Analyzed
Published: 21 Oct 2024, 20:05
Last modified:11 May 2026, 18:50

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
<0.01% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

21 Oct 2024, 20:05
Published
Vulnerability first disclosed
11 May 2026, 18:50
Last Modified
Vulnerability information updated

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 ........@...

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.01%• Percentile: 0%

Techniques & Countermeasures

  • CWE-190•Integer Overflow or Wraparound

    The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

Affected Systems

  • linux•linux

    ≥ f2fcfcd670257236ebf2088bbdf26f6a8ef459fe, < 49d5867819ab7c744852b45509e8469839c07e0e | ≥ f2fcfcd670257236ebf2088bbdf26f6a8ef459fe, < 95f1847a361c7b4bf7d74c06ecb6968455082c1a | ≥ f2fcfcd670257236ebf2088bbdf26f6a8ef459fe, < ad528fde0702903208d0a79d88d5a42ae3fc235b | ≥ f2fcfcd670257236ebf2088bbdf26f6a8ef459fe, < 9fdc79b571434af7bc742da40a3405f038b637a7 | ≥ f2fcfcd670257236ebf2088bbdf26f6a8ef459fe, < f3fe6817156a2ad4b06f01afab04638a34d7c9a6 | ≥ f2fcfcd670257236ebf2088bbdf26f6a8ef459fe, < 19a78143961a197de8502f4f29c453b913dc3c29 | ≥ f2fcfcd670257236ebf2088bbdf26f6a8ef459fe, < 5550bbf709c323194881737fd290c4bada9e6ead | ≥ f2fcfcd670257236ebf2088bbdf26f6a8ef459fe, < bcd70260ef56e0aee8a4fc6cd214a419900b0765 | 2.6.32

  • linux•linux_kernel

    < 4.9.337 | ≥ 4.10, < 4.14.303 | ≥ 4.15, < 4.19.270 | ≥ 4.20, < 5.4.229 | ≥ 5.5, < 5.10.161 | ≥ 5.11, < 5.15.85 | ≥ 5.16, < 6.0.15 | 6.1:rc1 | 6.1:rc2 | 6.1:rc3 | 6.1:rc4 | 6.1:rc5 | 6.1:rc6 | 6.1:rc7 | 6.1:rc8

References (8)