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{
"schema_version": "1.7.0",
"id": "USN-4752-1",
"summary": "linux-oem-5.6 vulnerabilities",
"details": "Daniele Antonioli, Nils Ole Tippenhauer, and Kasper Rasmussen discovered\nthat legacy pairing and secure-connections pairing authentication in the\nBluetooth protocol could allow an unauthenticated user to complete\nauthentication without pairing credentials via adjacent access. A\nphysically proximate attacker could use this to impersonate a previously\npaired Bluetooth device. (CVE-2020-10135)\n\nJay Shin discovered that the ext4 file system implementation in the Linux\nkernel did not properly handle directory access with broken indexing,\nleading to an out-of-bounds read vulnerability. A local attacker could use\nthis to cause a denial of service (system crash). (CVE-2020-14314)\n\nIt was discovered that the block layer implementation in the Linux kernel\ndid not properly perform reference counting in some situations, leading to\na use-after-free vulnerability. A local attacker could use this to cause a\ndenial of service (system crash). (CVE-2020-15436)\n\nIt was discovered that the serial port driver in the Linux kernel did not\nproperly initialize a pointer in some situations. A local attacker could\npossibly use this to cause a denial of service (system crash).\n(CVE-2020-15437)\n\nAndy Nguyen discovered that the Bluetooth HCI event packet parser in the\nLinux kernel did not properly handle event advertisements of certain sizes,\nleading to a heap-based buffer overflow. A physically proximate remote\nattacker could use this to cause a denial of service (system crash) or\npossibly execute arbitrary code. (CVE-2020-24490)\n\nIt was discovered that the NFS client implementation in the Linux kernel\ndid not properly perform bounds checking before copying security labels in\nsome situations. A local attacker could use this to cause a denial of\nservice (system crash) or possibly execute arbitrary code. (CVE-2020-25212)\n\nIt was discovered that the Rados block device (rbd) driver in the Linux\nkernel did not properly perform privilege checks for access to rbd devices\nin some situations. A local attacker could use this to map or unmap rbd\nblock devices. (CVE-2020-25284)\n\nIt was discovered that the block layer subsystem in the Linux kernel did\nnot properly handle zero-length requests. A local attacker could use this\nto cause a denial of service. (CVE-2020-25641)\n\nIt was discovered that the HDLC PPP implementation in the Linux kernel did\nnot properly validate input in some situations. A local attacker could use\nthis to cause a denial of service (system crash) or possibly execute\narbitrary code. (CVE-2020-25643)\n\nKiyin (\u5c39\u4eae) discovered that the perf subsystem in the Linux kernel did\nnot properly deallocate memory in some situations. A privileged attacker\ncould use this to cause a denial of service (kernel memory exhaustion).\n(CVE-2020-25704)\n\nIt was discovered that the KVM hypervisor in the Linux kernel did not\nproperly handle interrupts in certain situations. A local attacker in a\nguest VM could possibly use this to cause a denial of service (host system\ncrash). (CVE-2020-27152)\n\nIt was discovered that the jfs file system implementation in the Linux\nkernel contained an out-of-bounds read vulnerability. A local attacker\ncould use this to possibly cause a denial of service (system crash).\n(CVE-2020-27815)\n\nIt was discovered that an information leak existed in the syscall\nimplementation in the Linux kernel on 32 bit systems. A local attacker\ncould use this to expose sensitive information (kernel memory).\n(CVE-2020-28588)\n\nIt was discovered that the framebuffer implementation in the Linux kernel\ndid not properly perform range checks in certain situations. A local\nattacker could use this to expose sensitive information (kernel memory).\n(CVE-2020-28915)\n\nJann Horn discovered a race condition in the copy-on-write implementation\nin the Linux kernel when handling hugepages. A local attacker could use\nthis to gain unintended write access to read-only memory pages.\n(CVE-2020-29368)\n\nJann Horn discovered that the mmap implementation in the Linux kernel\ncontained a race condition when handling munmap() operations, leading to a\nread-after-free vulnerability. A local attacker could use this to cause a\ndenial of service (system crash) or possibly expose sensitive information.\n(CVE-2020-29369)\n\nJann Horn discovered that the romfs file system in the Linux kernel did not\nproperly validate file system meta-data, leading to an out-of-bounds read.\nAn attacker could use this to construct a malicious romfs image that, when\nmounted, exposed sensitive information (kernel memory). (CVE-2020-29371)\n\nJann Horn discovered that the tty subsystem of the Linux kernel did not use\nconsistent locking in some situations, leading to a read-after-free\nvulnerability. A local attacker could use this to cause a denial of service\n(system crash) or possibly expose sensitive information (kernel memory).\n(CVE-2020-29660)\n\nJann Horn discovered a race condition in the tty subsystem of the Linux\nkernel in the locking for the TIOCSPGRP ioctl(), leading to a use-after-\nfree vulnerability. A local attacker could use this to cause a denial of\nservice (system crash) or possibly execute arbitrary code. (CVE-2020-29661)\n\nIt was discovered that a race condition existed that caused the Linux\nkernel to not properly restrict exit signal delivery. A local attacker\ncould possibly use this to send signals to arbitrary processes.\n(CVE-2020-35508)\n",
"aliases": [],
"upstream": [
"UBUNTU-CVE-2020-10135",
"UBUNTU-CVE-2020-14314",
"UBUNTU-CVE-2020-15436",
"UBUNTU-CVE-2020-15437",
"UBUNTU-CVE-2020-24490",
"UBUNTU-CVE-2020-25212",
"UBUNTU-CVE-2020-25284",
"UBUNTU-CVE-2020-25641",
"UBUNTU-CVE-2020-25643",
"UBUNTU-CVE-2020-25704",
"UBUNTU-CVE-2020-27152",
"UBUNTU-CVE-2020-27815",
"UBUNTU-CVE-2020-28588",
"UBUNTU-CVE-2020-28915",
"UBUNTU-CVE-2020-29368",
"UBUNTU-CVE-2020-29369",
"UBUNTU-CVE-2020-29371",
"UBUNTU-CVE-2020-29660",
"UBUNTU-CVE-2020-29661",
"UBUNTU-CVE-2020-35508"
],
"related": [],
"published": "2021-02-25T06:54:20Z",
"modified": "2026-06-03T10:45:24Z",
"affected": [
{
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "linux-oem-5.6",
"purl": "pkg:deb/ubuntu/linux-oem-5.6@5.6.0-1048.52?arch=source&distro=focal"
},
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "5.6.0-1048.52"
}
]
}
],
"versions": [
"5.6.0-1007.7",
"5.6.0-1008.8",
"5.6.0-1010.10",
"5.6.0-1011.11",
"5.6.0-1013.13",
"5.6.0-1017.17",
"5.6.0-1018.18",
"5.6.0-1020.20",
"5.6.0-1021.21",
"5.6.0-1023.23",
"5.6.0-1026.26",
"5.6.0-1027.27",
"5.6.0-1028.28",
"5.6.0-1031.32",
"5.6.0-1032.33",
"5.6.0-1033.35",
"5.6.0-1034.36",
"5.6.0-1035.37",
"5.6.0-1036.39",
"5.6.0-1039.43",
"5.6.0-1042.46",
"5.6.0-1047.51"
],
"ecosystem_specific": {
"binaries": [
{
"binary_name": "linux-buildinfo-5.6.0-1048-oem",
"binary_version": "5.6.0-1048.52"
},
{
"binary_name": "linux-headers-5.6.0-1048-oem",
"binary_version": "5.6.0-1048.52"
},
{
"binary_name": "linux-image-unsigned-5.6.0-1048-oem",
"binary_version": "5.6.0-1048.52"
},
{
"binary_name": "linux-modules-5.6.0-1048-oem",
"binary_version": "5.6.0-1048.52"
},
{
"binary_name": "linux-oem-5.6-headers-5.6.0-1048",
"binary_version": "5.6.0-1048.52"
},
{
"binary_name": "linux-oem-5.6-tools-5.6.0-1048",
"binary_version": "5.6.0-1048.52"
},
{
"binary_name": "linux-oem-5.6-tools-host",
"binary_version": "5.6.0-1048.52"
},
{
"binary_name": "linux-tools-5.6.0-1048-oem",
"binary_version": "5.6.0-1048.52"
}
],
"availability": "No subscription required"
},
"database_specific": {
"cves_map": {
"ecosystem": "Ubuntu:20.04:LTS",
"cves": [
{
"id": "CVE-2020-10135",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2020-14314",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2020-15436",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2020-15437",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "low"
}
]
},
{
"id": "CVE-2020-24490",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2020-25212",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2020-25284",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2020-25641",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2020-25643",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2020-25704",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2020-27152",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2020-27815",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2020-28588",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2020-28915",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:P/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2020-29368",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2020-29369",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2020-29371",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2020-29660",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2020-29661",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "high"
}
]
},
{
"id": "CVE-2020-35508",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L"
},
{
"type": "Ubuntu",
"score": "low"
}
]
}
]
}
}
}
],
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-4752-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-10135"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-14314"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-15436"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-15437"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-24490"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-25212"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-25284"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-25641"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-25643"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-25704"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-27152"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-27815"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-28588"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-28915"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-29368"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-29369"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-29371"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-29660"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-29661"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-35508"
}
]
}