PublicDateAtUSN: 2020-06-09 05:15:00 UTC
Candidate: CVE-2020-13974
PublicDate: 2020-06-09 05:15:00 UTC
References:
 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-13974
 https://git.kernel.org/linus/b86dab054059b970111b5516ae548efaae5b3aae
 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b86dab054059b970111b5516ae548efaae5b3aae
 https://lkml.org/lkml/2020/3/22/482
 https://lore.kernel.org/lkml/CAEAjams79+V8bxpcp3UAsU1AnJ+gx2y+ZqhDhjJCpZn2oeZA4Q@mail.gmail.com/
 https://ubuntu.com/security/notices/USN-4427-1
 https://ubuntu.com/security/notices/USN-4439-1
 https://ubuntu.com/security/notices/USN-4440-1
 https://ubuntu.com/security/notices/USN-4483-1
 https://ubuntu.com/security/notices/USN-4485-1
Description:
 An issue was discovered in the Linux kernel 4.4 through 5.7.1.
 drivers/tty/vt/keyboard.c has an integer overflow if k_ascii is called
 several times in a row, aka CID-b86dab054059. NOTE: Members in the
 community argue that the integer overflow does not lead to a security issue
 in this case.
Ubuntu-Description:
 It was discovered that the Virtual Terminal keyboard driver in the Linux
 kernel contained an integer overflow. A local attacker could possibly use
 this to have an unspecified impact.
Notes:
 sbeattie> reproducer in lore.kernel.org link
Mitigation:
Bugs:
Priority: low
Discovered-by: FuzzUSB, syzkaller
Assigned-to:
CVSS:
 nvd: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H [7.8 HIGH]

Patches_linux:
 break-fix: - b86dab054059b970111b5516ae548efaae5b3aae
upstream_linux: released (5.8~rc1)
precise/esm_linux: ignored (was needs-triage ESM criteria)
trusty_linux: ignored (out of standard support)
trusty/esm_linux: ignored (was needs-triage ESM criteria)
xenial_linux: released (4.4.0-186.216)
esm-infra/xenial_linux: released (4.4.0-186.216)
bionic_linux: released (4.15.0-115.116)
eoan_linux: ignored (was pending \[5.3.0-63.57\] now end-of-life)
focal_linux: released (5.4.0-45.49)
devel_linux: not-affected (5.8.0-16.17)

Patches_linux-hwe:
upstream_linux-hwe: released (5.8~rc1)
precise/esm_linux-hwe: DNE
trusty_linux-hwe: DNE
trusty/esm_linux-hwe: DNE
xenial_linux-hwe: released (4.15.0-115.116~16.04.1)
esm-infra/xenial_linux-hwe: released (4.15.0-115.116~16.04.1)
bionic_linux-hwe: released (5.3.0-64.58~18.04.1)
eoan_linux-hwe: DNE
focal_linux-hwe: DNE
devel_linux-hwe: DNE

Patches_linux-hwe-edge:
upstream_linux-hwe-edge: released (5.8~rc1)
precise/esm_linux-hwe-edge: DNE
trusty_linux-hwe-edge: DNE
trusty/esm_linux-hwe-edge: DNE
xenial_linux-hwe-edge: ignored (was needs-triage now end-of-life)
esm-infra/xenial_linux-hwe-edge: ignored (was needs-triage now end-of-life)
bionic_linux-hwe-edge: ignored (was needs-triage now end-of-life)
eoan_linux-hwe-edge: DNE
focal_linux-hwe-edge: DNE
devel_linux-hwe-edge: DNE

Patches_linux-lts-trusty:
upstream_linux-lts-trusty: released (5.8~rc1)
precise/esm_linux-lts-trusty: ignored (was needs-triage ESM criteria)
trusty_linux-lts-trusty: DNE
trusty/esm_linux-lts-trusty: DNE
xenial_linux-lts-trusty: DNE
bionic_linux-lts-trusty: DNE
eoan_linux-lts-trusty: DNE
focal_linux-lts-trusty: DNE
devel_linux-lts-trusty: DNE

Patches_linux-lts-xenial:
upstream_linux-lts-xenial: released (5.8~rc1)
precise/esm_linux-lts-xenial: DNE
trusty_linux-lts-xenial: ignored (out of standard support)
trusty/esm_linux-lts-xenial: released (4.4.0-186.216~14.04.1)
xenial_linux-lts-xenial: DNE
bionic_linux-lts-xenial: DNE
eoan_linux-lts-xenial: DNE
focal_linux-lts-xenial: DNE
devel_linux-lts-xenial: DNE

Patches_linux-kvm:
upstream_linux-kvm: released (5.8~rc1)
precise/esm_linux-kvm: DNE
trusty_linux-kvm: DNE
trusty/esm_linux-kvm: DNE
xenial_linux-kvm: released (4.4.0-1077.84)
esm-infra/xenial_linux-kvm: released (4.4.0-1077.84)
bionic_linux-kvm: released (4.15.0-1072.73)
eoan_linux-kvm: ignored (was pending \[5.3.0-1025.27\] now end-of-life)
focal_linux-kvm: released (5.4.0-1021.21)
devel_linux-kvm: not-affected (5.8.0-1001.1)

Patches_linux-aws:
upstream_linux-aws: released (5.8~rc1)
precise/esm_linux-aws: DNE
trusty_linux-aws: ignored (out of standard support)
trusty/esm_linux-aws: released (4.4.0-1075.79)
xenial_linux-aws: released (4.4.0-1111.123)
esm-infra/xenial_linux-aws: released (4.4.0-1111.123)
bionic_linux-aws: released (4.15.0-1080.84)
eoan_linux-aws: ignored (was pending \[5.3.0-1031.33\] now end-of-life)
focal_linux-aws: released (5.4.0-1022.22)
devel_linux-aws: not-affected (5.8.0-1004.4)

Patches_linux-aws-5.0:
upstream_linux-aws-5.0: released (5.8~rc1)
precise/esm_linux-aws-5.0: DNE
trusty_linux-aws-5.0: DNE
trusty/esm_linux-aws-5.0: DNE
xenial_linux-aws-5.0: DNE
bionic_linux-aws-5.0: ignored (was needs-triage now end-of-life)
eoan_linux-aws-5.0: DNE
focal_linux-aws-5.0: DNE
devel_linux-aws-5.0: DNE

Patches_linux-aws-5.3:
upstream_linux-aws-5.3: released (5.8~rc1)
precise/esm_linux-aws-5.3: DNE
trusty_linux-aws-5.3: DNE
trusty/esm_linux-aws-5.3: DNE
xenial_linux-aws-5.3: DNE
bionic_linux-aws-5.3: released (5.3.0-1032.34~18.04.2)
eoan_linux-aws-5.3: DNE
focal_linux-aws-5.3: DNE
devel_linux-aws-5.3: DNE

Patches_linux-aws-hwe:
upstream_linux-aws-hwe: released (5.8~rc1)
precise/esm_linux-aws-hwe: DNE
trusty_linux-aws-hwe: DNE
trusty/esm_linux-aws-hwe: DNE
xenial_linux-aws-hwe: released (4.15.0-1080.84~16.04.1)
esm-infra/xenial_linux-aws-hwe: released (4.15.0-1080.84~16.04.1)
bionic_linux-aws-hwe: DNE
eoan_linux-aws-hwe: DNE
focal_linux-aws-hwe: DNE
devel_linux-aws-hwe: DNE

Patches_linux-azure:
upstream_linux-azure: released (5.8~rc1)
precise/esm_linux-azure: DNE
trusty_linux-azure: ignored (out of standard support)
trusty/esm_linux-azure: released (4.15.0-1093.103~14.04.1)
xenial_linux-azure: released (4.15.0-1093.103~16.04.1)
esm-infra/xenial_linux-azure: released (4.15.0-1093.103~16.04.1)
bionic_linux-azure: ignored (was needs-triage now end-of-life)
eoan_linux-azure: ignored (was pending \[5.3.0-1033.34\] now end-of-life)
focal_linux-azure: released (5.4.0-1023.23)
devel_linux-azure: not-affected (5.8.0-1004.4)

Patches_linux-azure-4.15:
upstream_linux-azure-4.15: released (5.8~rc1)
precise/esm_linux-azure-4.15: DNE
trusty_linux-azure-4.15: DNE
trusty/esm_linux-azure-4.15: DNE
xenial_linux-azure-4.15: DNE
bionic_linux-azure-4.15: released (4.15.0-1093.103)
eoan_linux-azure-4.15: DNE
focal_linux-azure-4.15: DNE
devel_linux-azure-4.15: DNE

Patches_linux-azure-5.3:
upstream_linux-azure-5.3: released (5.8~rc1)
precise/esm_linux-azure-5.3: DNE
trusty_linux-azure-5.3: DNE
trusty/esm_linux-azure-5.3: DNE
xenial_linux-azure-5.3: DNE
bionic_linux-azure-5.3: released (5.3.0-1034.35~18.04.1)
eoan_linux-azure-5.3: DNE
focal_linux-azure-5.3: DNE
devel_linux-azure-5.3: DNE

Patches_linux-azure-edge:
upstream_linux-azure-edge: released (5.8~rc1)
precise/esm_linux-azure-edge: DNE
trusty_linux-azure-edge: DNE
trusty/esm_linux-azure-edge: DNE
xenial_linux-azure-edge: DNE
bionic_linux-azure-edge: ignored (was needs-triage now end-of-life)
eoan_linux-azure-edge: DNE
focal_linux-azure-edge: DNE
devel_linux-azure-edge: DNE

Patches_linux-gcp:
upstream_linux-gcp: released (5.8~rc1)
precise/esm_linux-gcp: DNE
trusty_linux-gcp: DNE
trusty/esm_linux-gcp: DNE
xenial_linux-gcp: released (4.15.0-1081.92~16.04.1)
esm-infra/xenial_linux-gcp: released (4.15.0-1081.92~16.04.1)
bionic_linux-gcp: ignored (was needs-triage now end-of-life)
eoan_linux-gcp: ignored (was pending \[5.3.0-1031.33\] now end-of-life)
focal_linux-gcp: released (5.4.0-1022.22)
devel_linux-gcp: not-affected (5.8.0-1002.2)

Patches_linux-gcp-4.15:
upstream_linux-gcp-4.15: released (5.8~rc1)
precise/esm_linux-gcp-4.15: DNE
trusty_linux-gcp-4.15: DNE
trusty/esm_linux-gcp-4.15: DNE
xenial_linux-gcp-4.15: DNE
bionic_linux-gcp-4.15: released (4.15.0-1081.92)
eoan_linux-gcp-4.15: DNE
focal_linux-gcp-4.15: DNE
devel_linux-gcp-4.15: DNE

Patches_linux-gcp-5.3:
upstream_linux-gcp-5.3: released (5.8~rc1)
precise/esm_linux-gcp-5.3: DNE
trusty_linux-gcp-5.3: DNE
trusty/esm_linux-gcp-5.3: DNE
xenial_linux-gcp-5.3: DNE
bionic_linux-gcp-5.3: released (5.3.0-1032.34~18.04.1)
eoan_linux-gcp-5.3: DNE
focal_linux-gcp-5.3: DNE
devel_linux-gcp-5.3: DNE

Patches_linux-gcp-edge:
upstream_linux-gcp-edge: released (5.8~rc1)
precise/esm_linux-gcp-edge: DNE
trusty_linux-gcp-edge: DNE
trusty/esm_linux-gcp-edge: DNE
xenial_linux-gcp-edge: DNE
bionic_linux-gcp-edge: ignored (was needs-triage now end-of-life)
eoan_linux-gcp-edge: DNE
focal_linux-gcp-edge: DNE
devel_linux-gcp-edge: DNE

Patches_linux-gke-4.15:
upstream_linux-gke-4.15: released (5.8~rc1)
precise/esm_linux-gke-4.15: DNE
trusty_linux-gke-4.15: DNE
trusty/esm_linux-gke-4.15: DNE
xenial_linux-gke-4.15: DNE
bionic_linux-gke-4.15: released (4.15.0-1067.70)
eoan_linux-gke-4.15: DNE
focal_linux-gke-4.15: DNE
devel_linux-gke-4.15: DNE

Patches_linux-gke-5.0:
upstream_linux-gke-5.0: released (5.8~rc1)
precise/esm_linux-gke-5.0: DNE
trusty_linux-gke-5.0: DNE
trusty/esm_linux-gke-5.0: DNE
xenial_linux-gke-5.0: DNE
bionic_linux-gke-5.0: released (5.0.0-1045.46)
eoan_linux-gke-5.0: DNE
focal_linux-gke-5.0: DNE
devel_linux-gke-5.0: DNE

Patches_linux-gke-5.3:
upstream_linux-gke-5.3: released (5.8~rc1)
precise/esm_linux-gke-5.3: DNE
trusty_linux-gke-5.3: DNE
trusty/esm_linux-gke-5.3: DNE
xenial_linux-gke-5.3: DNE
bionic_linux-gke-5.3: released (5.3.0-1032.34~18.04.1)
eoan_linux-gke-5.3: DNE
focal_linux-gke-5.3: DNE
devel_linux-gke-5.3: DNE

Patches_linux-oracle:
upstream_linux-oracle: released (5.8~rc1)
precise/esm_linux-oracle: DNE
trusty_linux-oracle: DNE
trusty/esm_linux-oracle: DNE
xenial_linux-oracle: released (4.15.0-1051.55~16.04.1)
esm-infra/xenial_linux-oracle: released (4.15.0-1051.55~16.04.1)
bionic_linux-oracle: released (4.15.0-1051.55)
eoan_linux-oracle: ignored (was pending \[5.3.0-1029.31\] now end-of-life)
focal_linux-oracle: released (5.4.0-1022.22)
devel_linux-oracle: not-affected (5.8.0-1001.1)

Patches_linux-oracle-5.0:
upstream_linux-oracle-5.0: released (5.8~rc1)
precise/esm_linux-oracle-5.0: DNE
trusty_linux-oracle-5.0: DNE
trusty/esm_linux-oracle-5.0: DNE
xenial_linux-oracle-5.0: DNE
bionic_linux-oracle-5.0: ignored (was needs-triage now end-of-life)
eoan_linux-oracle-5.0: DNE
focal_linux-oracle-5.0: DNE
devel_linux-oracle-5.0: DNE

Patches_linux-oracle-5.3:
upstream_linux-oracle-5.3: released (5.8~rc1)
precise/esm_linux-oracle-5.3: DNE
trusty_linux-oracle-5.3: DNE
trusty/esm_linux-oracle-5.3: DNE
xenial_linux-oracle-5.3: DNE
bionic_linux-oracle-5.3: released (5.3.0-1030.32~18.04.1)
eoan_linux-oracle-5.3: DNE
focal_linux-oracle-5.3: DNE
devel_linux-oracle-5.3: DNE

Patches_linux-oem:
upstream_linux-oem: released (5.8~rc1)
precise/esm_linux-oem: DNE
trusty_linux-oem: DNE
trusty/esm_linux-oem: DNE
xenial_linux-oem: ignored (was needs-triage now end-of-life)
bionic_linux-oem: released (4.15.0-1094.104)
eoan_linux-oem: ignored (reached end-of-life)
focal_linux-oem: DNE
devel_linux-oem: DNE

Patches_linux-oem-5.6:
upstream_linux-oem-5.6: released (5.8~rc1)
precise/esm_linux-oem-5.6: DNE
trusty_linux-oem-5.6: DNE
trusty/esm_linux-oem-5.6: DNE
xenial_linux-oem-5.6: DNE
bionic_linux-oem-5.6: DNE
eoan_linux-oem-5.6: DNE
focal_linux-oem-5.6: released (5.6.0-1018.18)
devel_linux-oem-5.6: not-affected (5.6.0-1020.20)

Patches_linux-oem-osp1:
upstream_linux-oem-osp1: released (5.8~rc1)
precise/esm_linux-oem-osp1: DNE
trusty_linux-oem-osp1: DNE
trusty/esm_linux-oem-osp1: DNE
xenial_linux-oem-osp1: DNE
bionic_linux-oem-osp1: released (5.0.0-1065.70)
eoan_linux-oem-osp1: ignored (reached end-of-life)
focal_linux-oem-osp1: DNE
devel_linux-oem-osp1: DNE

Patches_linux-raspi:
upstream_linux-raspi: released (5.8~rc1)
precise/esm_linux-raspi: DNE
trusty_linux-raspi: DNE
trusty/esm_linux-raspi: DNE
xenial_linux-raspi: DNE
bionic_linux-raspi: DNE
eoan_linux-raspi: DNE
focal_linux-raspi: released (5.4.0-1016.17)
devel_linux-raspi: not-affected (5.4.0-1016.17)

Patches_linux-raspi2:
upstream_linux-raspi2: released (5.8~rc1)
precise/esm_linux-raspi2: DNE
trusty_linux-raspi2: DNE
trusty/esm_linux-raspi2: DNE
xenial_linux-raspi2: released (4.4.0-1136.145)
bionic_linux-raspi2: released (4.15.0-1068.72)
eoan_linux-raspi2: ignored (was pending \[5.3.0-1029.31\] now end-of-life)
focal_linux-raspi2: ignored (was needs-triage now end-of-life)
devel_linux-raspi2: DNE

Patches_linux-raspi2-5.3:
upstream_linux-raspi2-5.3: released (5.8~rc1)
precise/esm_linux-raspi2-5.3: DNE
trusty_linux-raspi2-5.3: DNE
trusty/esm_linux-raspi2-5.3: DNE
xenial_linux-raspi2-5.3: DNE
bionic_linux-raspi2-5.3: released (5.3.0-1030.32~18.04.2)
eoan_linux-raspi2-5.3: DNE
focal_linux-raspi2-5.3: DNE
devel_linux-raspi2-5.3: DNE

Patches_linux-riscv:
upstream_linux-riscv: released (5.8~rc1)
precise/esm_linux-riscv: DNE
trusty_linux-riscv: DNE
trusty/esm_linux-riscv: DNE
xenial_linux-riscv: DNE
bionic_linux-riscv: DNE
eoan_linux-riscv: DNE
focal_linux-riscv: released (5.4.0-31.35)
devel_linux-riscv: not-affected (5.8.0-1.1)

Patches_linux-snapdragon:
upstream_linux-snapdragon: released (5.8~rc1)
precise/esm_linux-snapdragon: DNE
trusty_linux-snapdragon: DNE
trusty/esm_linux-snapdragon: DNE
xenial_linux-snapdragon: released (4.4.0-1140.148)
bionic_linux-snapdragon: released (4.15.0-1084.92)
eoan_linux-snapdragon: DNE
focal_linux-snapdragon: DNE
devel_linux-snapdragon: DNE

Patches_linux-hwe-5.4:
upstream_linux-hwe-5.4: released (5.8~rc1)
precise/esm_linux-hwe-5.4: DNE
trusty_linux-hwe-5.4: DNE
trusty/esm_linux-hwe-5.4: DNE
xenial_linux-hwe-5.4: DNE
bionic_linux-hwe-5.4: released (5.4.0-45.49~18.04.2)
focal_linux-hwe-5.4: DNE
devel_linux-hwe-5.4: DNE

Patches_linux-raspi-5.4:
upstream_linux-raspi-5.4: released (5.8~rc1)
precise/esm_linux-raspi-5.4: DNE
trusty_linux-raspi-5.4: DNE
trusty/esm_linux-raspi-5.4: DNE
xenial_linux-raspi-5.4: DNE
bionic_linux-raspi-5.4: released (5.4.0-1016.17~18.04.1)
focal_linux-raspi-5.4: DNE
devel_linux-raspi-5.4: DNE

Patches_linux-azure-5.4:
upstream_linux-azure-5.4: released (5.8~rc1)
precise/esm_linux-azure-5.4: DNE
trusty_linux-azure-5.4: DNE
trusty/esm_linux-azure-5.4: DNE
xenial_linux-azure-5.4: DNE
bionic_linux-azure-5.4: released (5.4.0-1023.23~18.04.1)
focal_linux-azure-5.4: DNE
devel_linux-azure-5.4: DNE

Patches_linux-oracle-5.4:
upstream_linux-oracle-5.4: released (5.8~rc1)
precise/esm_linux-oracle-5.4: DNE
trusty_linux-oracle-5.4: DNE
trusty/esm_linux-oracle-5.4: DNE
xenial_linux-oracle-5.4: DNE
bionic_linux-oracle-5.4: released (5.4.0-1022.22~18.04.1)
focal_linux-oracle-5.4: DNE
devel_linux-oracle-5.4: DNE

Patches_linux-gcp-5.4:
upstream_linux-gcp-5.4: released (5.8~rc1)
precise/esm_linux-gcp-5.4: DNE
trusty_linux-gcp-5.4: DNE
trusty/esm_linux-gcp-5.4: DNE
xenial_linux-gcp-5.4: DNE
bionic_linux-gcp-5.4: released (5.4.0-1022.22~18.04.1)
focal_linux-gcp-5.4: DNE
devel_linux-gcp-5.4: DNE

Patches_linux-aws-5.4:
upstream_linux-aws-5.4: released (5.8~rc1)
precise/esm_linux-aws-5.4: DNE
trusty_linux-aws-5.4: DNE
trusty/esm_linux-aws-5.4: DNE
xenial_linux-aws-5.4: DNE
bionic_linux-aws-5.4: released (5.4.0-1022.22~18.04.1)
focal_linux-aws-5.4: DNE
devel_linux-aws-5.4: DNE