CVE-2015-8844
The signal implementation in the Linux kernel before 4.3.5 on powerpc platforms does not check for an MSR with both the S and T bits set, which allows local users to cause a denial of service (TM Bad
02 Description
The signal implementation in the Linux kernel before 4.3.5 on powerpc platforms does not check for an MSR with both the S and T bits set, which allows local users to cause a denial of service (TM Bad
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
- 0.38% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 32.4% of scored records. A rank, not a probability.
- NVD base score
- 5.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- 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
- 2016-04-27 17:00Z10 YR AGO
- Last updated
- 2024-08-06 08:29Z2 YR AGO
- Reserved
- 2016-04-13
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- Data version
- 5.1
- Document digest
- bc7ec0074fcfe41657178cfa00d0335321655a33cbea264390727addbeb27bf9
05 Affected products
06 References
- www.kernel.orghttp://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.5
- www.openwall.com[oss-security] 20160413 CVE Request: Linux kernel: incorrect restoration of machine specific registers from signal handler.http://www.openwall.com/lists/oss-security/2016/04/13/1
- rhn.redhat.comRHSA-2016:2584http://rhn.redhat.com/errata/RHSA-2016-2584.html
- git.kernel.orghttp://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d2b9d2a5ad5ef04ff978c9923d19730cb05efd55
- rhn.redhat.comRHSA-2016:2574http://rhn.redhat.com/errata/RHSA-2016-2574.html
- www.securitytracker.com1035594http://www.securitytracker.com/id/1035594
- github.comhttps://github.com/torvalds/linux/commit/d2b9d2a5ad5ef04ff978c9923d19730cb05efd55
- bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1326540
07 Fixed in
Debian 12
- linux Fixed in 4.4.2-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- linux Fixed in 4.4.2-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- linux Fixed in 4.4.2-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 14.04 LTS
- linux Fixed in 3.13.0-77.121
- linux-lts-utopic Fixed in 3.16.0-60.80~14.04.1
- linux-lts-vivid Fixed in 3.19.0-49.55~14.04.1
- linux-lts-wily Fixed in 4.2.0-27.32~14.04.1
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.