CVE-2020-12771 in Ubuntu

CVE-2020-12771

Priority

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.

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

Notes

Package

Source: linux (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	released (4.15.0-115.116)
Ubuntu 20.04 LTS:	released (5.4.0-45.49)
Ubuntu 16.04 ESM:	released (4.4.0-187.217)
Ubuntu 14.04 ESM:	ignored (was needs-triage ESM criteria)

Patches:

Introduced by

2a285686c109816ba71a00b9278262cf02648258

Fixed by

be23e837333a914df3f24bf0b32e87b0331ab8d1

Package

Source: linux-aws (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	released (4.15.0-1080.84)
Ubuntu 20.04 LTS:	released (5.4.0-1022.22)
Ubuntu 16.04 ESM:	released (4.4.0-1112.124)
Ubuntu 14.04 ESM:	released (4.4.0-1076.80)

Patches:

Package

Source: linux-aws-5.0 (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	ignored (was needs-triage now end-of-life)
Ubuntu 20.04 LTS:	DNE
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-aws-5.3 (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	released (5.3.0-1033.35)
Ubuntu 20.04 LTS:	DNE
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-aws-5.4 (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	released (5.4.0-1022.22~18.04.1)
Ubuntu 20.04 LTS:	DNE
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-aws-hwe (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	DNE
Ubuntu 20.04 LTS:	DNE
Ubuntu 16.04 ESM:	released (4.15.0-1080.84~16.04.1)
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-azure (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	ignored (was needs-triage now end-of-life)
Ubuntu 20.04 LTS:	released (5.4.0-1023.23)
Ubuntu 16.04 ESM:	released (4.15.0-1093.103~16.04.1)
Ubuntu 14.04 ESM:	released (4.15.0-1093.103~14.04.1)

Patches:

Package

Source: linux-azure-4.15 (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	released (4.15.0-1093.103)
Ubuntu 20.04 LTS:	DNE
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-azure-5.3 (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	released (5.3.0-1035.36)
Ubuntu 20.04 LTS:	DNE
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-azure-5.4 (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	released (5.4.0-1023.23~18.04.1)
Ubuntu 20.04 LTS:	DNE
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-azure-edge (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	ignored (was needs-triage now end-of-life)
Ubuntu 20.04 LTS:	DNE
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-gcp (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	ignored (was needs-triage now end-of-life)
Ubuntu 20.04 LTS:	released (5.4.0-1022.22)
Ubuntu 16.04 ESM:	released (4.15.0-1081.92~16.04.1)
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-gcp-4.15 (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	released (4.15.0-1081.92)
Ubuntu 20.04 LTS:	DNE
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-gcp-5.3 (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	ignored (was needed now end-of-life)
Ubuntu 20.04 LTS:	DNE
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-gcp-5.4 (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	released (5.4.0-1022.22~18.04.1)
Ubuntu 20.04 LTS:	DNE
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-gcp-edge (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	ignored (was needs-triage now end-of-life)
Ubuntu 20.04 LTS:	DNE
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-gke-4.15 (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	released (4.15.0-1067.70)
Ubuntu 20.04 LTS:	DNE
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-gke-5.0 (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	released (5.0.0-1046.47)
Ubuntu 20.04 LTS:	DNE
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-gke-5.3 (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	released (5.3.0-1033.35)
Ubuntu 20.04 LTS:	DNE
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-gke-5.4 (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	not-affected (5.4.0-1025.25~18.04.1)
Ubuntu 20.04 LTS:	DNE
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-gkeop-5.4 (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	not-affected (5.4.0-1001.1)
Ubuntu 20.04 LTS:	DNE
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-hwe (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	released (5.3.0-65.59)
Ubuntu 20.04 LTS:	DNE
Ubuntu 16.04 ESM:	released (4.15.0-115.116~16.04.1)
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-hwe-5.4 (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	released (5.4.0-45.49~18.04.2)
Ubuntu 20.04 LTS:	DNE
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-hwe-5.8 (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	DNE
Ubuntu 20.04 LTS:	not-affected (5.8.0-23.24~20.04.1)
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-hwe-edge (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	ignored (was needs-triage now end-of-life)
Ubuntu 20.04 LTS:	DNE
Ubuntu 16.04 ESM:	ignored (was needs-triage now end-of-life)
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-kvm (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	released (4.15.0-1072.73)
Ubuntu 20.04 LTS:	released (5.4.0-1021.21)
Ubuntu 16.04 ESM:	released (4.4.0-1078.85)
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-lts-trusty (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	DNE
Ubuntu 20.04 LTS:	DNE
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-lts-xenial (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	DNE
Ubuntu 20.04 LTS:	DNE
Ubuntu 14.04 ESM:	released (4.4.0-187.217~14.04.1)

Patches:

Package

Source: linux-oem (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	released (4.15.0-1094.104)
Ubuntu 20.04 LTS:	DNE
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-oem-5.6 (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	DNE
Ubuntu 20.04 LTS:	released (5.6.0-1031.32)
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-oem-osp1 (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	released (5.0.0-1067.72)
Ubuntu 20.04 LTS:	DNE
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-oracle (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	released (4.15.0-1051.55)
Ubuntu 20.04 LTS:	released (5.4.0-1022.22)
Ubuntu 16.04 ESM:	released (4.15.0-1051.55~16.04.1)
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-oracle-5.0 (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	ignored (was needs-triage now end-of-life)
Ubuntu 20.04 LTS:	DNE
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-oracle-5.3 (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	ignored (was needed now end-of-life)
Ubuntu 20.04 LTS:	DNE
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-oracle-5.4 (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	released (5.4.0-1022.22~18.04.1)
Ubuntu 20.04 LTS:	DNE
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-raspi (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	DNE
Ubuntu 20.04 LTS:	released (5.4.0-1016.17)
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-raspi-5.4 (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	released (5.4.0-1016.17~18.04.1)
Ubuntu 20.04 LTS:	DNE
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-raspi2 (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	released (4.15.0-1068.72)
Ubuntu 20.04 LTS:	ignored (was needs-triage now end-of-life)
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-raspi2-5.3 (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	released (5.3.0-1032.34)
Ubuntu 20.04 LTS:	DNE
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-riscv (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	DNE
Ubuntu 20.04 LTS:	released (5.4.0-31.35)
Ubuntu 14.04 ESM:	DNE

Patches:

Package

Source: linux-snapdragon (LP Ubuntu Debian)

Upstream:	released (5.8~rc2)
Ubuntu 18.04 LTS:	released (4.15.0-1084.92)
Ubuntu 20.04 LTS:	DNE
Ubuntu 14.04 ESM:	DNE

Patches:

More Information

Updated: 2022-04-13 14:06:53 UTC (commit f411bd370d482ef4385c4e751d121a4055fbc009)