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CVE-2019-15902

Publication date 4 September 2019

Last updated 24 July 2024


Ubuntu priority

Cvss 3 Severity Score

5.6 · Medium

Score breakdown

A backporting error was discovered in the Linux stable/longterm kernel 4.4.x through 4.4.190, 4.9.x through 4.9.190, 4.14.x through 4.14.141, 4.19.x through 4.19.69, and 5.2.x through 5.2.11. Misuse of the upstream "x86/ptrace: Fix possible spectre-v1 in ptrace_get_debugreg()" commit reintroduced the Spectre vulnerability that it aimed to eliminate. This occurred because the backport process depends on cherry picking specific commits, and because two (correctly ordered) code lines were swapped.

From the Ubuntu Security Team

Brad Spengler discovered that a Spectre mitigation was improperly implemented in the ptrace susbsystem of the Linux kernel. A local attacker could possibly use this to expose sensitive information.

Status

Package Ubuntu Release Status
linux 20.04 LTS focal
Not affected
19.10 eoan
Not affected
19.04 disco
Fixed 5.0.0-32.34
18.04 LTS bionic
Fixed 4.15.0-66.75
16.04 LTS xenial
Fixed 4.4.0-166.195
14.04 LTS trusty Ignored
linux-aws 20.04 LTS focal
Not affected
19.10 eoan
Not affected
19.04 disco
Fixed 5.0.0-1019.21
18.04 LTS bionic
Fixed 4.15.0-1052.54
16.04 LTS xenial
Fixed 4.4.0-1096.107
14.04 LTS trusty
linux-aws-5.0 20.04 LTS focal Not in release
19.10 eoan Not in release
19.04 disco Not in release
18.04 LTS bionic
Not affected
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-aws-hwe 20.04 LTS focal Not in release
19.10 eoan Not in release
19.04 disco Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial
Fixed 4.15.0-1052.54~16.04.1
14.04 LTS trusty Not in release
linux-azure 20.04 LTS focal
Not affected
19.10 eoan
Not affected
19.04 disco
Fixed 5.0.0-1023.24
18.04 LTS bionic
Fixed 5.0.0-1023.24~18.04.1
16.04 LTS xenial
Fixed 4.15.0-1061.66
14.04 LTS trusty
linux-azure-5.3 20.04 LTS focal Not in release
19.10 eoan Not in release
19.04 disco Not in release
18.04 LTS bionic
Not affected
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-azure-edge 20.04 LTS focal Not in release
19.10 eoan Not in release
19.04 disco Not in release
18.04 LTS bionic
Fixed 5.0.0-1023.24~18.04.1
16.04 LTS xenial
Fixed 4.15.0-1061.66
14.04 LTS trusty Not in release
linux-gcp 20.04 LTS focal
Not affected
19.10 eoan
Not affected
19.04 disco
Fixed 5.0.0-1021.21
18.04 LTS bionic
Fixed 5.0.0-1021.21~18.04.1
16.04 LTS xenial
Fixed 4.15.0-1047.50
14.04 LTS trusty Not in release
linux-gcp-5.3 20.04 LTS focal Not in release
19.10 eoan Not in release
19.04 disco Not in release
18.04 LTS bionic
Not affected
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-gcp-edge 20.04 LTS focal Not in release
19.10 eoan Not in release
19.04 disco Not in release
18.04 LTS bionic
Fixed 5.0.0-1021.21~18.04.1
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-gke-4.15 20.04 LTS focal Not in release
19.10 eoan Not in release
19.04 disco Not in release
18.04 LTS bionic
Fixed 4.15.0-1046.49
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-gke-5.0 20.04 LTS focal Not in release
19.10 eoan Not in release
19.04 disco Not in release
18.04 LTS bionic
Fixed 5.0.0-1023.23~18.04.2
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-gke-5.3 20.04 LTS focal Not in release
19.10 eoan Not in release
18.04 LTS bionic
Not affected
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-hwe 20.04 LTS focal Not in release
19.10 eoan Not in release
19.04 disco Not in release
18.04 LTS bionic
Fixed 5.0.0-32.34~18.04.2
16.04 LTS xenial
Fixed 4.15.0-66.75~16.04.1
14.04 LTS trusty Not in release
linux-hwe-edge 20.04 LTS focal Not in release
19.10 eoan Not in release
19.04 disco Not in release
18.04 LTS bionic
Not affected
16.04 LTS xenial
Fixed 4.15.0-66.75~16.04.1
14.04 LTS trusty Not in release
linux-kvm 20.04 LTS focal
Not affected
19.10 eoan
Not affected
19.04 disco
Fixed 5.0.0-1020.21
18.04 LTS bionic
Fixed 4.15.0-1048.48
16.04 LTS xenial
Fixed 4.4.0-1060.67
14.04 LTS trusty Not in release
linux-lts-trusty 20.04 LTS focal Not in release
19.10 eoan Not in release
19.04 disco Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-lts-xenial 20.04 LTS focal Not in release
19.10 eoan Not in release
19.04 disco Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty
linux-oem 20.04 LTS focal Not in release
19.10 eoan
Fixed 4.15.0-1059.68
19.04 disco Ignored
18.04 LTS bionic
Fixed 4.15.0-1059.68
16.04 LTS xenial Ignored
14.04 LTS trusty Not in release
linux-oem-5.6 20.04 LTS focal
Not affected
19.10 eoan Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-oem-osp1 20.04 LTS focal Not in release
19.10 eoan
Not affected
19.04 disco Ignored
18.04 LTS bionic
Fixed 5.0.0-1025.28
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-oracle 20.04 LTS focal
Not affected
19.10 eoan
Not affected
19.04 disco Ignored
18.04 LTS bionic
Fixed 4.15.0-1027.30
16.04 LTS xenial
Fixed 4.15.0-1027.30~16.04.1
14.04 LTS trusty Not in release
linux-oracle-5.0 20.04 LTS focal Not in release
19.10 eoan Not in release
19.04 disco Not in release
18.04 LTS bionic
Not affected
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-oracle-5.3 20.04 LTS focal Not in release
19.10 eoan Not in release
18.04 LTS bionic
Not affected
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-raspi2 20.04 LTS focal
Not affected
19.10 eoan
Not affected
19.04 disco
Fixed 5.0.0-1020.20
18.04 LTS bionic
Fixed 4.15.0-1049.53
16.04 LTS xenial
Fixed 4.4.0-1124.133
14.04 LTS trusty Not in release
linux-raspi2-5.3 20.04 LTS focal Not in release
19.10 eoan Not in release
18.04 LTS bionic
Not affected
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-snapdragon 20.04 LTS focal Not in release
19.10 eoan Not in release
19.04 disco
Fixed 5.0.0-1024.25
18.04 LTS bionic
Fixed 4.15.0-1066.73
16.04 LTS xenial
Fixed 4.4.0-1128.136
14.04 LTS trusty Not in release

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
linux

Severity score breakdown

Parameter Value
Base score 5.6 · Medium
Attack vector Local
Attack complexity High
Privileges required Low
User interaction None
Scope Changed
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N

References

Related Ubuntu Security Notices (USN)

    • USN-4157-2
    • Linux kernel (HWE) vulnerabilities
    • 22 October 2019
    • USN-4162-1
    • Linux kernel vulnerabilities
    • 22 October 2019
    • USN-4162-2
    • Linux kernel (Azure) vulnerabilities
    • 23 October 2019
    • USN-4163-2
    • Linux kernel (Xenial HWE) vulnerabilities
    • 23 October 2019
    • USN-4163-1
    • Linux kernel vulnerabilities
    • 22 October 2019
    • USN-4157-1
    • Linux kernel vulnerabilities
    • 17 October 2019

Other references