CVE-2018-15572
The spectre_v2_select_mitigation function in arch/x86/kernel/cpu/bugs.c in the Linux kernel before 4.18.1 does not always fill RSB upon a context switch, which makes it easier for attackers to conduct
02 Description
The spectre_v2_select_mitigation function in arch/x86/kernel/cpu/bugs.c in the Linux kernel before 4.18.1 does not always fill RSB upon a context switch, which makes it easier for attackers to conduct
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 0.51% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 43.3% of scored records. A rank, not a probability.
- NVD base score
- 6.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2018-08-20 02:00Z8 YR AGO
- Last updated
- 2024-08-05 10:01Z2 YR AGO
- Reserved
- 2018-08-19
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-515Covert Storage ChannelBase
- Data version
- 5.1
- Document digest
- bf8b845664191c802ebfd129b94059ae8ca2f87c97c219d474c40cc96f7999ee
05 Affected products
06 References
- git.kernel.orghttp://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=fdf82a7856b32d905c39afc85e34364491e46346
- usn.ubuntu.comUSN-3776-1https://usn.ubuntu.com/3776-1/
- usn.ubuntu.comUSN-3776-2https://usn.ubuntu.com/3776-2/
- usn.ubuntu.comUSN-3777-1https://usn.ubuntu.com/3777-1/
- github.comhttps://github.com/torvalds/linux/commit/fdf82a7856b32d905c39afc85e34364491e46346
- usn.ubuntu.comUSN-3775-1https://usn.ubuntu.com/3775-1/
- lists.debian.org[debian-lts-announce] 20181003 [SECURITY] [DLA 1531-1] linux-4.9 security updatehttps://lists.debian.org/debian-lts-announce/2018/10/msg00003.html
- www.debian.orgDSA-4308https://www.debian.org/security/2018/dsa-4308
- usn.ubuntu.comUSN-3775-2https://usn.ubuntu.com/3775-2/
- cdn.kernel.orghttps://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.1
- usn.ubuntu.comUSN-3777-2https://usn.ubuntu.com/3777-2/
- usn.ubuntu.comUSN-3777-3https://usn.ubuntu.com/3777-3/
07 Fixed in
Debian 12
- linux Fixed in 4.17.15-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- linux Fixed in 4.17.15-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- linux Fixed in 4.17.15-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 14.04 LTS
- linux-aws Fixed in 4.4.0-1031.34
- linux-azure Fixed in 4.15.0-1030.31~14.04.1
- linux-lts-xenial Fixed in 4.4.0-137.163~14.04.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- linux Fixed in 4.4.0-137.163
- linux-aws Fixed in 4.4.0-1069.79
- linux-azure Fixed in 4.15.0-1025.26~16.04.1
- linux-gcp Fixed in 4.15.0-1021.22~16.04.1
- linux-hwe Fixed in 4.15.0-36.39~16.04.1
- linux-kvm Fixed in 4.4.0-1035.41
- linux-raspi2 Fixed in 4.4.0-1098.106
- linux-snapdragon Fixed in 4.4.0-1102.107
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- linux Fixed in 4.15.0-36.39
- linux-aws Fixed in 4.15.0-1023.23
- linux-azure Fixed in 4.15.0-1025.26
- linux-gcp Fixed in 4.15.0-1021.22
- linux-kvm Fixed in 4.15.0-1023.23
- linux-oem Fixed in 4.15.0-1021.24
- linux-raspi2 Fixed in 4.15.0-1024.26
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.