PublicDateAtUSN: 2020-05-09 21:15:00 UTC
Candidate: CVE-2020-12771
PublicDate: 2020-05-09 21:15:00 UTC
References:
 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12771
 https://lkml.org/lkml/2020/4/26/87
 https://git.kernel.org/pub/scm/linux/kernel/git/colyli/bcache-patches.git/tree/for-test/0001-bcache-fix-potential-deadlock-problem-in-btree_gc_co.patch
 https://lore.kernel.org/lkml/8a6f5fe3-33f9-48e2-e347-05781c3295fd@huawei.com/
 https://ubuntu.com/security/notices/USN-4462-1
 https://ubuntu.com/security/notices/USN-4463-1
 https://ubuntu.com/security/notices/USN-4465-1
 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 through 5.6.11.
 btree_gc_coalesce in drivers/md/bcache/btree.c has a deadlock if a
 coalescing operation fails.
Ubuntu-Description:
 It was discovered that the bcache subsystem in the Linux kernel did not
 properly release a lock in some error conditions. A local attacker could
 possibly use this to cause a denial of service.
Notes:
Mitigation:
Bugs:
Priority: low
Discovered-by:
Assigned-to:
CVSS:
 nvd: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H [5.5 MEDIUM]

Patches_linux:
 break-fix: 2a285686c109816ba71a00b9278262cf02648258 be23e837333a914df3f24bf0b32e87b0331ab8d1
upstream_linux: released (5.8~rc2)
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 (4.4.0-187.217)
esm-infra/xenial_linux: released (4.4.0-187.217)
bionic_linux: released (4.15.0-115.116)
eoan_linux: ignored (reached end-of-life)
focal_linux: released (5.4.0-45.49)
groovy_linux: not-affected (5.8.0-16.17)
devel_linux: not-affected (5.8.0-34.37+21.04.1)

Patches_linux-hwe:
upstream_linux-hwe: released (5.8~rc2)
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 (5.3.0-65.59)
eoan_linux-hwe: DNE
focal_linux-hwe: DNE
groovy_linux-hwe: DNE
devel_linux-hwe: DNE

Patches_linux-hwe-edge:
upstream_linux-hwe-edge: released (5.8~rc2)
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
groovy_linux-hwe-edge: DNE
devel_linux-hwe-edge: DNE

Patches_linux-lts-xenial:
upstream_linux-lts-xenial: released (5.8~rc2)
precise/esm_linux-lts-xenial: DNE
trusty_linux-lts-xenial: ignored (out of standard support)
trusty/esm_linux-lts-xenial: released (4.4.0-187.217~14.04.1)
xenial_linux-lts-xenial: DNE
bionic_linux-lts-xenial: DNE
eoan_linux-lts-xenial: DNE
focal_linux-lts-xenial: DNE
groovy_linux-lts-xenial: DNE
devel_linux-lts-xenial: DNE

Patches_linux-lts-trusty:
upstream_linux-lts-trusty: released (5.8~rc2)
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
groovy_linux-lts-trusty: DNE
devel_linux-lts-trusty: DNE

Patches_linux-oem:
upstream_linux-oem: released (5.8~rc2)
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
groovy_linux-oem: DNE
devel_linux-oem: DNE

Patches_linux-oem-osp1:
upstream_linux-oem-osp1: released (5.8~rc2)
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 (5.0.0-1067.72)
eoan_linux-oem-osp1: ignored (reached end-of-life)
focal_linux-oem-osp1: DNE
groovy_linux-oem-osp1: DNE
devel_linux-oem-osp1: DNE

Patches_linux-kvm:
upstream_linux-kvm: released (5.8~rc2)
precise/esm_linux-kvm: DNE
trusty_linux-kvm: DNE
trusty/esm_linux-kvm: DNE
xenial_linux-kvm: released (4.4.0-1078.85)
esm-infra/xenial_linux-kvm: released (4.4.0-1078.85)
bionic_linux-kvm: released (4.15.0-1072.73)
eoan_linux-kvm: ignored (reached end-of-life)
focal_linux-kvm: released (5.4.0-1021.21)
groovy_linux-kvm: not-affected (5.8.0-1001.1)
devel_linux-kvm: not-affected (5.8.0-1010.11+21.04.1)

Patches_linux-aws:
upstream_linux-aws: released (5.8~rc2)
precise/esm_linux-aws: DNE
trusty_linux-aws: ignored (out of standard support)
trusty/esm_linux-aws: released (4.4.0-1076.80)
xenial_linux-aws: released (4.4.0-1112.124)
esm-infra/xenial_linux-aws: released (4.4.0-1112.124)
bionic_linux-aws: released (4.15.0-1080.84)
eoan_linux-aws: ignored (reached end-of-life)
focal_linux-aws: released (5.4.0-1022.22)
groovy_linux-aws: not-affected (5.8.0-1004.4)
devel_linux-aws: not-affected (5.8.0-1017.18+21.04.2)

Patches_linux-aws-5.0:
upstream_linux-aws-5.0: released (5.8~rc2)
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
groovy_linux-aws-5.0: DNE
devel_linux-aws-5.0: DNE

Patches_linux-aws-hwe:
upstream_linux-aws-hwe: released (5.8~rc2)
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
groovy_linux-aws-hwe: DNE
devel_linux-aws-hwe: DNE

Patches_linux-azure:
upstream_linux-azure: released (5.8~rc2)
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 (reached end-of-life)
focal_linux-azure: released (5.4.0-1023.23)
groovy_linux-azure: not-affected (5.8.0-1004.4)
devel_linux-azure: not-affected (5.8.0-1016.17+21.04.1)

Patches_linux-azure-5.3:
upstream_linux-azure-5.3: released (5.8~rc2)
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 (5.3.0-1035.36)
eoan_linux-azure-5.3: DNE
focal_linux-azure-5.3: DNE
groovy_linux-azure-5.3: DNE
devel_linux-azure-5.3: DNE

Patches_linux-azure-edge:
upstream_linux-azure-edge: released (5.8~rc2)
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
groovy_linux-azure-edge: DNE
devel_linux-azure-edge: DNE

Patches_linux-gcp:
upstream_linux-gcp: released (5.8~rc2)
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 (reached end-of-life)
focal_linux-gcp: released (5.4.0-1022.22)
groovy_linux-gcp: not-affected (5.8.0-1002.2)
devel_linux-gcp: not-affected (5.8.0-1015.15+21.04.1)

Patches_linux-gcp-5.3:
upstream_linux-gcp-5.3: released (5.8~rc2)
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: ignored (was needed now end-of-life)
eoan_linux-gcp-5.3: DNE
focal_linux-gcp-5.3: DNE
groovy_linux-gcp-5.3: DNE
devel_linux-gcp-5.3: DNE

Patches_linux-gcp-edge:
upstream_linux-gcp-edge: released (5.8~rc2)
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
groovy_linux-gcp-edge: DNE
devel_linux-gcp-edge: DNE

Patches_linux-gke-4.15:
upstream_linux-gke-4.15: released (5.8~rc2)
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
groovy_linux-gke-4.15: DNE
devel_linux-gke-4.15: DNE

Patches_linux-gke-5.0:
upstream_linux-gke-5.0: released (5.8~rc2)
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 (5.0.0-1046.47)
eoan_linux-gke-5.0: DNE
focal_linux-gke-5.0: DNE
groovy_linux-gke-5.0: DNE
devel_linux-gke-5.0: DNE

Patches_linux-oracle:
upstream_linux-oracle: released (5.8~rc2)
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 (reached end-of-life)
focal_linux-oracle: released (5.4.0-1022.22)
groovy_linux-oracle: not-affected (5.8.0-1001.1)
devel_linux-oracle: not-affected (5.8.0-1014.14+21.04.1)

Patches_linux-oracle-5.0:
upstream_linux-oracle-5.0: released (5.8~rc2)
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
groovy_linux-oracle-5.0: DNE
devel_linux-oracle-5.0: DNE

Patches_linux-raspi2:
upstream_linux-raspi2: released (5.8~rc2)
precise/esm_linux-raspi2: DNE
trusty_linux-raspi2: DNE
trusty/esm_linux-raspi2: DNE
xenial_linux-raspi2: released (4.4.0-1137.146)
bionic_linux-raspi2: released (4.15.0-1068.72)
eoan_linux-raspi2: ignored (reached end-of-life)
focal_linux-raspi2: ignored (was needs-triage now end-of-life)
groovy_linux-raspi2: DNE
devel_linux-raspi2: DNE

Patches_linux-snapdragon:
upstream_linux-snapdragon: released (5.8~rc2)
precise/esm_linux-snapdragon: DNE
trusty_linux-snapdragon: DNE
trusty/esm_linux-snapdragon: DNE
xenial_linux-snapdragon: released (4.4.0-1141.149)
bionic_linux-snapdragon: released (4.15.0-1084.92)
eoan_linux-snapdragon: DNE
focal_linux-snapdragon: DNE
groovy_linux-snapdragon: DNE
devel_linux-snapdragon: DNE

Patches_linux-raspi2-5.3:
upstream_linux-raspi2-5.3: released (5.8~rc2)
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 (5.3.0-1032.34)
eoan_linux-raspi2-5.3: DNE
focal_linux-raspi2-5.3: DNE
groovy_linux-raspi2-5.3: DNE
devel_linux-raspi2-5.3: DNE

Patches_linux-oem-5.6:
upstream_linux-oem-5.6: released (5.8~rc2)
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 (5.6.0-1031.32)
groovy_linux-oem-5.6: DNE
devel_linux-oem-5.6: DNE

Patches_linux-gke-5.3:
upstream_linux-gke-5.3: released (5.8~rc2)
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 (5.3.0-1033.35)
eoan_linux-gke-5.3: DNE
focal_linux-gke-5.3: DNE
groovy_linux-gke-5.3: DNE
devel_linux-gke-5.3: DNE

Patches_linux-oracle-5.3:
upstream_linux-oracle-5.3: released (5.8~rc2)
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: ignored (was needed now end-of-life)
eoan_linux-oracle-5.3: DNE
focal_linux-oracle-5.3: DNE
groovy_linux-oracle-5.3: DNE
devel_linux-oracle-5.3: DNE

Patches_linux-riscv:
upstream_linux-riscv: released (5.8~rc2)
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)
groovy_linux-riscv: not-affected (5.8.0-1.1)
devel_linux-riscv: not-affected (5.8.0-10.12+21.04.1)

Patches_linux-raspi:
upstream_linux-raspi: released (5.8~rc2)
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)
groovy_linux-raspi: not-affected (5.4.0-1016.17)
devel_linux-raspi: not-affected (5.8.0-1008.11+21.04.1)

Patches_linux-azure-4.15:
upstream_linux-azure-4.15: released (5.8~rc2)
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
groovy_linux-azure-4.15: DNE
devel_linux-azure-4.15: DNE

Patches_linux-aws-5.3:
upstream_linux-aws-5.3: released (5.8~rc2)
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 (5.3.0-1033.35)
eoan_linux-aws-5.3: DNE
focal_linux-aws-5.3: DNE
groovy_linux-aws-5.3: DNE
devel_linux-aws-5.3: DNE

Patches_linux-gcp-4.15:
upstream_linux-gcp-4.15: released (5.8~rc2)
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
groovy_linux-gcp-4.15: DNE
devel_linux-gcp-4.15: DNE

Patches_linux-hwe-5.4:
upstream_linux-hwe-5.4: released (5.8~rc2)
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
groovy_linux-hwe-5.4: DNE
devel_linux-hwe-5.4: DNE

Patches_linux-raspi-5.4:
upstream_linux-raspi-5.4: released (5.8~rc2)
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
groovy_linux-raspi-5.4: DNE
devel_linux-raspi-5.4: DNE

Patches_linux-azure-5.4:
upstream_linux-azure-5.4: released (5.8~rc2)
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
groovy_linux-azure-5.4: DNE
devel_linux-azure-5.4: DNE

Patches_linux-oracle-5.4:
upstream_linux-oracle-5.4: released (5.8~rc2)
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
groovy_linux-oracle-5.4: DNE
devel_linux-oracle-5.4: DNE

Patches_linux-gcp-5.4:
upstream_linux-gcp-5.4: released (5.8~rc2)
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
groovy_linux-gcp-5.4: DNE
devel_linux-gcp-5.4: DNE

Patches_linux-aws-5.4:
upstream_linux-aws-5.4: released (5.8~rc2)
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
groovy_linux-aws-5.4: DNE
devel_linux-aws-5.4: DNE

Patches_linux-hwe-5.8:
upstream_linux-hwe-5.8: released (5.8~rc2)
precise/esm_linux-hwe-5.8: DNE
trusty_linux-hwe-5.8: DNE
trusty/esm_linux-hwe-5.8: DNE
xenial_linux-hwe-5.8: DNE
bionic_linux-hwe-5.8: DNE
focal_linux-hwe-5.8: not-affected (5.8.0-23.24~20.04.1)
groovy_linux-hwe-5.8: DNE
devel_linux-hwe-5.8: DNE

Patches_linux-gke-5.4:
upstream_linux-gke-5.4: released (5.8~rc2)
precise/esm_linux-gke-5.4: DNE
trusty_linux-gke-5.4: DNE
trusty/esm_linux-gke-5.4: DNE
xenial_linux-gke-5.4: DNE
bionic_linux-gke-5.4: not-affected (5.4.0-1025.25~18.04.1)
focal_linux-gke-5.4: DNE
groovy_linux-gke-5.4: DNE
devel_linux-gke-5.4: DNE

Patches_linux-gkeop-5.4:
upstream_linux-gkeop-5.4: released (5.8~rc2)
precise/esm_linux-gkeop-5.4: DNE
trusty_linux-gkeop-5.4: DNE
trusty/esm_linux-gkeop-5.4: DNE
xenial_linux-gkeop-5.4: DNE
bionic_linux-gkeop-5.4: not-affected (5.4.0-1001.1)
focal_linux-gkeop-5.4: DNE
groovy_linux-gkeop-5.4: DNE
devel_linux-gkeop-5.4: DNE