CVE-2020-35499
A NULL pointer dereference flaw in kernel versions prior to 5.11 may be seen if...
A NULL pointer dereference flaw in Linux kernel versions prior to 5.11 may be seen if sco_sock_getsockopt function in net/bluetooth/sco.c do not have a sanity check for a socket connection, when using BT_SNDMTU/BT_RCVMTU for SCO sockets. This could allow a local attacker with a special user privilege to crash the system (DOS) or leak kernel internal information.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- High
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
A NULL pointer dereference flaw in Linux kernel versions prior to 5.11 may be seen if sco_sock_getsockopt function in net/bluetooth/sco.c do not have a sanity check for a socket connection, when using BT_SNDMTU/BT_RCVMTU for SCO sockets. This could allow a local attacker with a special user privilege to crash the system (DOS) or leak kernel internal information.
- Record
CVE-2020-35499- CVSS 3.1
- 6.7 Medium
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.2 High
AV:L/AC:L/Au:N/C:C/I:C/A:C - Weakness
- CWE-476
- Updated
- 2026-11-02
CVE ListNo score
A NULL pointer dereference flaw in Linux kernel versions prior to 5.11 may be seen if sco_sock_getsockopt function in net/bluetooth/sco.c do not have a sanity check for a socket connection, when using BT_SNDMTU/BT_RCVMTU for SCO sockets. This could allow a local attacker with a special user privilege to crash the system (DOS) or leak kernel internal information.
- Record
CVE-2020-35499- Weakness
- CWE-476
- Updated
- 2026-11-02
EUVDEUVD-2020-23168No score
A NULL pointer dereference flaw in Linux kernel versions prior to 5.11 may be seen if sco_sock_getsockopt function in net/bluetooth/sco.c do not have a sanity check for a socket connection, when using BT_SNDMTU/BT_RCVMTU for SCO sockets. This could allow a local attacker with a special user privilege to crash the system (DOS) or leak kernel internal information.
- Record
EUVD-2020-23168- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-3m4x-gq6q-g6qr
A NULL pointer dereference flaw in kernel versions prior to 5.11 may be seen if...
A NULL pointer dereference flaw in kernel versions prior to 5.11 may be seen if sco_sock_getsockopt function in net/bluetooth/sco.c do not have a sanity check for a socket connection, when using BT_SNDMTU/BT_RCVMTU for SCO sockets. This could allow a local attacker with a special user privilege to crash the system (DOS) or leak kernel internal information.
- Record
GHSA-3m4x-gq6q-g6qr- CVSS 3.1
- 6.7 Medium
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-476
- Updated
- 2026-11-02
OSVAZL-6527
CVE-2020-35499 affecting package kernel for versions less than 5.10.78.1-1
A NULL pointer dereference flaw in Linux kernel versions prior to 5.11 may be seen if sco_sock_getsockopt function in net/bluetooth/sco.c do not have a sanity check for a socket connection, when using BT_SNDMTU/BT_RCVMTU for SCO sockets. This could allow a local attacker with a special user privilege to crash the system (DOS) or leak kernel internal information.
- Record
AZL-6527- CVSS 3.1
- 6.7 Medium
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSV
A NULL pointer dereference flaw in Linux kernel versions prior to 5.11 may be seen if sco_sock_getsockopt function in net/bluetooth/sco.c do not have a sanity check for a socket connection, when using BT_SNDMTU/BT_RCVMTU for SCO sockets. This could allow a local attacker with a special user privilege to crash the system (DOS) or leak kernel internal information.
- Record
CVE-2020-35499- CVSS 3.1
- 6.7 Medium
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2020-35499
A NULL pointer dereference flaw in Linux kernel versions prior to 5.11 may be seen if sco_sock_getsockopt function in net/bluetooth/sco.c do not have a sanity check for a socket connection, when using BT_SNDMTU/BT_RCVMTU for SCO sockets. This could allow a local attacker with a special user privilege to crash the system (DOS) or leak kernel internal information.
- Record
DEBIAN-CVE-2020-35499- CVSS 3.1
- 6.7 Medium
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2020-35499
A NULL pointer dereference flaw in Linux kernel versions prior to 5.11 may be seen if sco_sock_getsockopt function in net/bluetooth/sco.c do not have a sanity check for a socket connection, when using BT_SNDMTU/BT_RCVMTU for SCO sockets. This could allow a local attacker with a special user privilege to crash the system (DOS) or leak kernel internal information.
- Record
UBUNTU-CVE-2020-35499- CVSS 3.1
- 6.7 Medium
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-11
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
kernelAzure Linux:2 | before 5.10.78.1-1 | 5.10.78.1-1 |
linuxDebian:12 | before 5.10.4-1 | 5.10.4-1 |
linuxDebian:13 | before 5.10.4-1 | 5.10.4-1 |
linuxDebian:14 | before 5.10.4-1 | 5.10.4-1 |
linuxUbuntu:Pro:14.04:LTS | All versions, plus listed versions 3.11.0-12.193.12.0-1.33.12.0-2.53.12.0-2.73.12.0-3.8 Show 45 moreShow less3.12.0-3.93.12.0-4.103.12.0-4.123.12.0-5.133.12.0-7.153.13.0-1.163.13.0-2.173.13.0-3.183.13.0-4.193.13.0-5.203.13.0-6.233.13.0-7.253.13.0-7.263.13.0-8.273.13.0-8.283.13.0-10.303.13.0-11.313.13.0-12.323.13.0-13.333.13.0-14.343.13.0-15.353.13.0-16.363.13.0-17.373.13.0-18.383.13.0-19.393.13.0-19.403.13.0-20.423.13.0-21.433.13.0-22.443.13.0-23.453.13.0-24.463.13.0-24.473.13.0-27.503.13.0-29.533.13.0-30.543.13.0-30.553.13.0-32.573.13.0-33.583.13.0-34.603.13.0-35.623.13.0-36.633.13.0-37.643.13.0-39.663.13.0-40.693.13.0-41.70 | None known |
linux-awsUbuntu:Pro:14.04:LTS | All versions, plus listed versions 4.4.0-1002.24.4.0-1003.34.4.0-1005.54.4.0-1006.64.4.0-1009.9 Show 45 moreShow less4.4.0-1010.104.4.0-1011.114.4.0-1012.124.4.0-1014.144.4.0-1016.164.4.0-1017.174.4.0-1019.194.4.0-1022.224.4.0-1023.234.4.0-1024.254.4.0-1025.264.4.0-1027.304.4.0-1028.314.4.0-1029.324.4.0-1031.344.4.0-1032.354.4.0-1034.374.4.0-1036.394.4.0-1037.404.4.0-1038.414.4.0-1039.424.4.0-1040.434.4.0-1042.454.4.0-1044.474.4.0-1045.484.4.0-1046.504.4.0-1048.524.4.0-1050.544.4.0-1052.564.4.0-1054.584.4.0-1055.594.4.0-1056.604.4.0-1058.624.4.0-1059.634.4.0-1060.644.4.0-1061.654.4.0-1062.664.4.0-1064.684.4.0-1065.694.4.0-1066.704.4.0-1067.714.4.0-1073.774.4.0-1074.784.4.0-1075.794.4.0-1076.80 | None known |
linux-azureUbuntu:Pro:14.04:LTS | All versions, plus listed versions 4.15.0-1023.24~14.04.14.15.0-1030.31~14.04.14.15.0-1031.32~14.04.14.15.0-1032.33~14.04.24.15.0-1035.36~14.04.2 Show 45 moreShow less4.15.0-1036.38~14.04.24.15.0-1037.39~14.04.24.15.0-1039.41~14.04.24.15.0-1040.44~14.04.14.15.0-1041.45~14.04.14.15.0-1042.46~14.04.14.15.0-1045.49~14.04.14.15.0-1046.50~14.04.14.15.0-1047.51~14.04.14.15.0-1049.54~14.04.14.15.0-1050.55~14.04.14.15.0-1051.56~14.04.14.15.0-1052.57~14.04.14.15.0-1055.60~14.04.14.15.0-1056.61~14.04.14.15.0-1057.62~14.04.14.15.0-1059.64~14.04.14.15.0-1060.65~14.04.14.15.0-1061.66~14.04.14.15.0-1063.68~14.04.14.15.0-1064.69~14.04.14.15.0-1066.71~14.04.14.15.0-1067.72~14.04.14.15.0-1069.74~14.04.14.15.0-1071.76~14.04.14.15.0-1074.79~14.04.14.15.0-1077.82~14.04.14.15.0-1082.92~14.04.14.15.0-1083.93~14.04.14.15.0-1089.99~14.04.14.15.0-1091.101~14.04.14.15.0-1092.102~14.04.14.15.0-1093.103~14.04.14.15.0-1095.105~14.04.14.15.0-1096.106~14.04.14.15.0-1098.109~14.04.14.15.0-1100.111~14.04.14.15.0-1102.113~14.04.14.15.0-1103.114~14.04.14.15.0-1106.118~14.04.14.15.0-1108.120~14.04.14.15.0-1109.121~14.04.14.15.0-1110.122~14.04.14.15.0-1111.123~14.04.14.15.0-1112.124~14.04.1 | None known |
linux-lts-xenialUbuntu:Pro:14.04:LTS | All versions, plus listed versions 4.4.0-13.29~14.04.14.4.0-14.30~14.04.24.4.0-15.31~14.04.14.4.0-18.34~14.04.14.4.0-21.37~14.04.1 Show 45 moreShow less4.4.0-22.39~14.04.14.4.0-22.40~14.04.14.4.0-24.43~14.04.14.4.0-28.47~14.04.14.4.0-31.50~14.04.14.4.0-34.53~14.04.14.4.0-36.55~14.04.14.4.0-38.57~14.04.14.4.0-42.62~14.04.14.4.0-45.66~14.04.14.4.0-47.68~14.04.14.4.0-51.72~14.04.14.4.0-53.74~14.04.14.4.0-57.78~14.04.14.4.0-59.80~14.04.14.4.0-62.83~14.04.14.4.0-63.84~14.04.24.4.0-64.85~14.04.14.4.0-66.87~14.04.14.4.0-67.88~14.04.14.4.0-70.91~14.04.14.4.0-71.92~14.04.14.4.0-72.93~14.04.14.4.0-75.96~14.04.14.4.0-78.99~14.04.24.4.0-79.100~14.04.14.4.0-81.104~14.04.14.4.0-83.106~14.04.14.4.0-87.110~14.04.14.4.0-89.112~14.04.14.4.0-91.114~14.04.14.4.0-92.115~14.04.14.4.0-93.116~14.04.14.4.0-96.119~14.04.14.4.0-97.120~14.04.14.4.0-98.121~14.04.14.4.0-101.124~14.04.14.4.0-103.126~14.04.14.4.0-104.127~14.04.14.4.0-108.131~14.04.14.4.0-109.132~14.04.14.4.0-111.134~14.04.14.4.0-112.135~14.04.14.4.0-116.140~14.04.14.4.0-119.143~14.04.1 | None known |
linux-hwe-edgeUbuntu:16.04:LTS | All versions, plus listed versions 4.8.0-28.30~16.04.14.8.0-30.32~16.04.14.8.0-32.34~16.04.14.8.0-34.36~16.04.14.10.0-14.16~16.04.1 Show 18 moreShow less4.10.0-19.21~16.04.14.10.0-20.22~16.04.14.10.0-21.23~16.04.14.10.0-22.24~16.04.14.10.0-24.28~16.04.14.10.0-26.30~16.04.14.11.0-13.19~16.04.14.11.0-14.20~16.04.14.13.0-16.19~16.04.34.13.0-17.20~16.04.14.13.0-19.22~16.04.14.13.0-21.24~16.04.14.13.0-25.29~16.04.24.15.0-13.14~16.04.14.15.0-15.16~16.04.14.15.0-20.21~16.04.14.15.0-22.24~16.04.14.15.0-23.25~16.04.1 | None known |
linux-aws-5.0Ubuntu:18.04:LTS | All versions, plus listed versions 5.0.0-1021.24~18.04.15.0.0-1022.25~18.04.15.0.0-1023.26~18.04.15.0.0-1024.27~18.04.15.0.0-1025.285.0.0-1027.30 | None known |
Show 14 moreShow less
| Package | Affected | Fixed |
|---|---|---|
linux-aws-5.3Ubuntu:18.04:LTS | All versions, plus listed versions 5.3.0-1016.17~18.04.15.3.0-1017.18~18.04.15.3.0-1019.21~18.04.15.3.0-1023.25~18.04.15.3.0-1028.30~18.04.1 Show 5 moreShow less5.3.0-1030.32~18.04.15.3.0-1032.34~18.04.25.3.0-1033.355.3.0-1034.365.3.0-1035.37 | None known |
linux-azureUbuntu:18.04:LTS | All versions, plus listed versions 4.15.0-1002.24.15.0-1003.34.15.0-1004.44.15.0-1008.84.15.0-1009.9 Show 39 moreShow less4.15.0-1012.124.15.0-1013.134.15.0-1014.144.15.0-1018.184.15.0-1019.194.15.0-1021.214.15.0-1022.234.15.0-1023.244.15.0-1025.264.15.0-1028.294.15.0-1030.314.15.0-1031.324.15.0-1032.334.15.0-1035.364.15.0-1036.384.15.0-1037.394.18.0-1011.11~18.04.14.18.0-1013.13~18.04.14.18.0-1014.14~18.04.14.18.0-1018.18~18.04.14.18.0-1019.19~18.04.14.18.0-1020.20~18.04.14.18.0-1023.24~18.04.14.18.0-1024.25~18.04.14.18.0-1025.27~18.04.15.0.0-1014.14~18.04.15.0.0-1016.17~18.04.15.0.0-1018.19~18.04.15.0.0-1020.21~18.04.15.0.0-1022.23~18.04.15.0.0-1023.24~18.04.15.0.0-1025.27~18.04.15.0.0-1027.29~18.04.15.0.0-1028.30~18.04.15.0.0-1029.31~18.04.15.0.0-1031.335.0.0-1032.345.0.0-1035.375.0.0-1036.38 | None known |
linux-azure-5.3Ubuntu:18.04:LTS | All versions, plus listed versions 5.3.0-1007.8~18.04.15.3.0-1008.9~18.04.15.3.0-1009.10~18.04.15.3.0-1010.11~18.04.15.3.0-1012.13~18.04.1 Show 11 moreShow less5.3.0-1013.14~18.04.15.3.0-1016.17~18.04.15.3.0-1018.19~18.04.15.3.0-1019.20~18.04.15.3.0-1020.21~18.04.15.3.0-1022.23~18.04.15.3.0-1028.29~18.04.15.3.0-1031.32~18.04.15.3.0-1032.33~18.04.15.3.0-1034.35~18.04.15.3.0-1035.36 | None known |
linux-azure-edgeUbuntu:18.04:LTS | All versions, plus listed versions 4.18.0-1006.6~18.04.14.18.0-1007.7~18.04.14.18.0-1008.8~18.04.15.0.0-1012.12~18.04.2 | None known |
linux-gcpUbuntu:18.04:LTS | All versions, plus listed versions 4.15.0-1001.14.15.0-1003.34.15.0-1005.54.15.0-1006.64.15.0-1008.8 Show 33 moreShow less4.15.0-1009.94.15.0-1010.104.15.0-1014.144.15.0-1015.154.15.0-1017.184.15.0-1018.194.15.0-1019.204.15.0-1021.224.15.0-1023.244.15.0-1024.254.15.0-1025.264.15.0-1026.274.15.0-1027.284.15.0-1028.294.15.0-1029.314.15.0-1030.324.15.0-1032.344.15.0-1033.354.15.0-1034.364.15.0-1036.384.15.0-1037.394.15.0-1040.424.15.0-1042.454.15.0-1044.705.0.0-1020.20~18.04.15.0.0-1021.21~18.04.15.0.0-1025.26~18.04.15.0.0-1026.27~18.04.15.0.0-1028.29~18.04.15.0.0-1029.30~18.04.15.0.0-1031.325.0.0-1033.345.0.0-1034.35 | None known |
linux-gcp-5.3Ubuntu:18.04:LTS | All versions, plus listed versions 5.3.0-1008.9~18.04.15.3.0-1009.10~18.04.15.3.0-1010.11~18.04.15.3.0-1012.13~18.04.15.3.0-1014.15~18.04.1 Show 8 moreShow less5.3.0-1016.17~18.04.15.3.0-1017.18~18.04.15.3.0-1018.19~18.04.15.3.0-1020.22~18.04.15.3.0-1026.28~18.04.15.3.0-1029.31~18.04.15.3.0-1030.32~18.04.15.3.0-1032.34~18.04.1 | None known |
linux-gcp-edgeUbuntu:18.04:LTS | All versions, plus listed versions 4.18.0-1004.5~18.04.14.18.0-1005.6~18.04.14.18.0-1006.7~18.04.14.18.0-1007.8~18.04.14.18.0-1008.9~18.04.1 Show 7 moreShow less4.18.0-1009.10~18.04.14.18.0-1011.12~18.04.14.18.0-1012.13~18.04.14.18.0-1013.14~18.04.14.18.0-1015.16~18.04.15.0.0-1011.11~18.04.15.0.0-1013.13~18.04.1 | None known |
linux-hweUbuntu:18.04:LTS | All versions, plus listed versions 4.18.0-13.14~18.04.14.18.0-14.15~18.04.14.18.0-15.16~18.04.14.18.0-16.17~18.04.14.18.0-17.18~18.04.1 Show 38 moreShow less4.18.0-18.19~18.04.14.18.0-20.21~18.04.14.18.0-21.22~18.04.14.18.0-22.23~18.04.14.18.0-24.25~18.04.14.18.0-25.26~18.04.15.0.0-23.24~18.04.15.0.0-25.26~18.04.15.0.0-27.28~18.04.15.0.0-29.31~18.04.15.0.0-31.33~18.04.15.0.0-32.34~18.04.25.0.0-35.38~18.04.15.0.0-36.39~18.04.15.0.0-37.40~18.04.15.3.0-26.28~18.04.15.3.0-28.30~18.04.15.3.0-40.32~18.04.15.3.0-42.34~18.04.15.3.0-45.37~18.04.15.3.0-46.38~18.04.15.3.0-51.44~18.04.25.3.0-53.47~18.04.15.3.0-59.53~18.04.15.3.0-61.55~18.04.15.3.0-62.56~18.04.15.3.0-64.58~18.04.15.3.0-65.595.3.0-66.605.3.0-67.615.3.0-68.635.3.0-69.655.3.0-70.665.3.0-72.685.3.0-73.695.3.0-74.705.3.0-75.715.3.0-76.72 | None known |
linux-hwe-edgeUbuntu:18.04:LTS | All versions, plus listed versions 5.0.0-15.16~18.04.15.0.0-16.17~18.04.15.0.0-17.18~18.04.15.0.0-19.20~18.04.15.0.0-20.21~18.04.1 Show 5 moreShow less5.3.0-19.20~18.04.25.3.0-22.24~18.04.15.3.0-23.25~18.04.15.3.0-23.25~18.04.25.3.0-24.26~18.04.2 | None known |
linux-oemUbuntu:18.04:LTS | All versions, plus listed versions 4.15.0-1002.34.15.0-1004.54.15.0-1006.94.15.0-1008.114.15.0-1009.12 Show 45 moreShow less4.15.0-1012.154.15.0-1013.164.15.0-1015.184.15.0-1017.204.15.0-1018.214.15.0-1021.244.15.0-1024.294.15.0-1026.314.15.0-1028.334.15.0-1030.354.15.0-1033.384.15.0-1034.394.15.0-1035.404.15.0-1036.414.15.0-1038.434.15.0-1039.444.15.0-1043.484.15.0-1045.504.15.0-1050.574.15.0-1056.654.15.0-1057.664.15.0-1059.684.15.0-1063.724.15.0-1064.734.15.0-1065.754.15.0-1066.764.15.0-1067.774.15.0-1069.794.15.0-1073.834.15.0-1076.864.15.0-1079.894.15.0-1080.904.15.0-1081.914.15.0-1087.974.15.0-1090.1004.15.0-1091.1014.15.0-1093.1034.15.0-1094.1044.15.0-1096.1064.15.0-1097.1074.15.0-1099.1094.15.0-1100.1104.15.0-1101.1124.15.0-1102.1134.15.0-1103.114 | None known |
linux-oracle-5.0Ubuntu:18.04:LTS | All versions, plus listed versions 5.0.0-1007.12~18.04.15.0.0-1008.13~18.04.15.0.0-1009.14~18.04.15.0.0-1010.15~18.04.15.0.0-1011.165.0.0-1013.185.0.0-1014.19 | None known |
linux-oracle-5.3Ubuntu:18.04:LTS | All versions, plus listed versions 5.3.0-1011.12~18.04.15.3.0-1013.14~18.04.15.3.0-1014.15~18.04.15.3.0-1016.18~18.04.15.3.0-1018.20~18.04.1 Show 4 moreShow less5.3.0-1024.26~18.04.15.3.0-1027.29~18.04.15.3.0-1028.30~18.04.15.3.0-1030.32~18.04.1 | None known |
linux-raspi2Ubuntu:20.04:LTS | All versions, plus listed versions 5.3.0-1007.85.3.0-1014.165.3.0-1015.175.3.0-1017.195.4.0-1004.45.4.0-1006.6 | None known |
linux-riscvUbuntu:20.04:LTS | All versions, plus listed versions 5.4.0-24.285.4.0-26.305.4.0-27.315.4.0-28.325.4.0-30.34 Show 7 moreShow less5.4.0-31.355.4.0-33.375.4.0-34.385.4.0-36.415.4.0-37.425.4.0-39.445.4.0-40.45 | None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected | OSV | |
| affected, facts | OSV | |
| aliases, products | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-35499 is a medium vulnerability (CVSS 6.7) in Linux Kernel, published February 19, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.27%, the 19th percentile. Fixed in kernel 5.10.78.1-1.
References
bugzilla.redhat.com/show_bug.cgi?id=1910048
nvd.nist.gov/vuln/detail/CVE-2020-35499
github.com/advisories/GHSA-3m4x-gq6q-g6qr
security-tracker.debian.org/tracker/CVE-2020-35499
ubuntu.com/security/CVE-2020-35499
git.kernel.org/linus/f6b8c6b5543983e9de29dc14716bfa4eb3f157c4
cve.org/CVERecord?id=CVE-2020-35499
Left out here: 416 versions. The JSON record has them.