CVE-2020-12652: The __mptctl_ioctl function in drivers/message/fusion/mptctl.c in the Linux kernel before 5.4.14 allows local users to hold an incorrect loc
Noroxi assessment
Priority: Monitor (action score 16/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 0.32% (FIRST EPSS).
- Someone with local access to the system can trigger it. Administrator privileges are required. No user action is required. Special conditions such as timing or configuration are required.
- Fixed version: linux (Debian:12) 5.4.19-1; kernel-debug (openSUSE:Leap 15.1) 4.12.14-lp151.28.52.1; kernel-default (openSUSE:Leap 15.1) 4.12.14-lp151.28.52.1.
- Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Low priority for now. Upgrade to linux (Debian:12) 5.4.19-1; kernel-debug (openSUSE:Leap 15.1) 4.12.14-lp151.28.52.1; kernel-default (openSUSE:Leap 15.1) 4.12.14-lp151.28.52.1 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
The __mptctl_ioctl function in drivers/message/fusion/mptctl.c in the Linux kernel before 5.4.14 allows local users to hold an incorrect lock during the ioctl operation and trigger a race condition, i.e., a "double fetch" vulnerability, aka CID-28d76df18f0a. NOTE: the vendor states "The security impact of this bug is not as bad as it could have been because these operations are all privileged and root already has enormous destructive power."
- Published
- May 5, 2020
- Updated
- Jun 16, 2026
- EPSS
- 0.3% · 25th percentile
- CWE
- CWE-362
Report tools
Action score
16
Monitor
Low priority for now.
- CVSS
- 16 / 40 · 4.1 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.3%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- linux linux kernelbefore 5.4.14
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | linux | before 5.4.19-1 | 5.4.19-1 |
| openSUSE:Leap 15.1 | kernel-debug | before 4.12.14-lp151.28.52.1 | 4.12.14-lp151.28.52.1 |
| openSUSE:Leap 15.1 | kernel-default | before 4.12.14-lp151.28.52.1 | 4.12.14-lp151.28.52.1 |
| openSUSE:Leap 15.1 | kernel-docs | before 4.12.14-lp151.28.52.2 | 4.12.14-lp151.28.52.2 |
| openSUSE:Leap 15.1 | kernel-kvmsmall | before 4.12.14-lp151.28.52.1 | 4.12.14-lp151.28.52.1 |
| openSUSE:Leap 15.1 | kernel-obs-build | before 4.12.14-lp151.28.52.3 | 4.12.14-lp151.28.52.3 |
| openSUSE:Leap 15.1 | kernel-obs-qa | before 4.12.14-lp151.28.52.3 | 4.12.14-lp151.28.52.3 |
| openSUSE:Leap 15.1 | kernel-source | before 4.12.14-lp151.28.52.1 | 4.12.14-lp151.28.52.1 |
| openSUSE:Leap 15.1 | kernel-syms | before 4.12.14-lp151.28.52.1 | 4.12.14-lp151.28.52.1 |
| openSUSE:Leap 15.1 | kernel-vanilla | before 4.12.14-lp151.28.52.1 | 4.12.14-lp151.28.52.1 |
| SUSE:HPE Helion OpenStack 8 | kernel-default | before 4.4.180-94.121.1 | 4.4.180-94.121.1 |
| SUSE:HPE Helion OpenStack 8 | kernel-source | before 4.4.180-94.121.1 | 4.4.180-94.121.1 |
| SUSE:HPE Helion OpenStack 8 | kernel-syms | before 4.4.180-94.121.1 | 4.4.180-94.121.1 |
| SUSE:HPE Helion OpenStack 8 | kgraft-patch-SLE12-SP3_Update_32 | before 1-4.5.1 | 1-4.5.1 |
| SUSE:Linux Enterprise High Availability Extension 12 SP4 | kernel-default | before 4.12.14-95.54.1 | 4.12.14-95.54.1 |
| SUSE:Linux Enterprise High Availability Extension 12 SP5 | kernel-default | before 4.12.14-122.23.1 | 4.12.14-122.23.1 |
| SUSE:Linux Enterprise Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_14 | before 1-6.3.1 | 1-6.3.1 |
| SUSE:Linux Enterprise Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_5 | before 1-8.3.1 | 1-8.3.1 |
| SUSE:Linux Enterprise Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_12 | before 1-3.5.1 | 1-3.5.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP1 | kernel-default | before 4.12.14-197.45.1 | 4.12.14-197.45.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP1 | kernel-source | before 4.12.14-197.45.1 | 4.12.14-197.45.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP1 | kernel-zfcpdump | before 4.12.14-197.45.1 | 4.12.14-197.45.1 |
| SUSE:Linux Enterprise Module for Development Tools 15 SP1 | kernel-docs | before 4.12.14-197.45.1 | 4.12.14-197.45.1 |
| SUSE:Linux Enterprise Module for Development Tools 15 SP1 | kernel-obs-build | before 4.12.14-197.45.1 | 4.12.14-197.45.1 |
+40
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Published before and after this one in the same product
- ← EarlierCVE-2020-12465Apr 29, 2020 · An array overflow was discovered in mt76_add_fragment in drivers/net/wireless/mediatek/mt76/dma.c in the Linux kernel before 5.5.10, aka CID26Monitor
- ← EarlierCVE-2020-12114May 4, 2020 · A pivot_root race condition in fs/namespace.c in the Linux kernel 4.4.x before 4.4.221, 4.9.x before 4.9.221, 4.14.x before 4.14.178, 4.19.x18Monitor
- Later →CVE-2020-12654May 5, 2020 · An issue was found in Linux kernel before 5.5.4.28Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:linux | 5.4.19-1 · Debian:12 | Package registry (OSV) |
| opensuse:kernel-debug | 4.12.14-lp151.28.52.1 · openSUSE:Leap 15.1 | Package registry (OSV) |
| opensuse:kernel-default | 4.12.14-lp151.28.52.1 · openSUSE:Leap 15.1 | Package registry (OSV) |
| opensuse:kernel-docs | 4.12.14-lp151.28.52.2 · openSUSE:Leap 15.1 | Package registry (OSV) |
| opensuse:kernel-kvmsmall | 4.12.14-lp151.28.52.1 · openSUSE:Leap 15.1 | Package registry (OSV) |
| opensuse:kernel-obs-build | 4.12.14-lp151.28.52.3 · openSUSE:Leap 15.1 | Package registry (OSV) |
| opensuse:kernel-obs-qa | 4.12.14-lp151.28.52.3 · openSUSE:Leap 15.1 | Package registry (OSV) |
| opensuse:kernel-source | 4.12.14-lp151.28.52.1 · openSUSE:Leap 15.1 | Package registry (OSV) |
| opensuse:kernel-syms | 4.12.14-lp151.28.52.1 · openSUSE:Leap 15.1 | Package registry (OSV) |
| opensuse:kernel-vanilla | 4.12.14-lp151.28.52.1 · openSUSE:Leap 15.1 | Package registry (OSV) |
| suse:kernel-azure | 4.12.14-16.16.1 · SUSE:Linux Enterprise Server 12 SP5 | Package registry (OSV) |
| suse:kernel-bigmem | 3.0.101-108.114.1 · SUSE:Linux Enterprise Server 11 SP4-LTSS | Package registry (OSV) |
| suse:kernel-default | 3.0.101-108.114.1 · SUSE:Linux Enterprise Server 11 SP4-LTSS | Package registry (OSV) |
| suse:kernel-ec2 | 3.0.101-108.114.1 · SUSE:Linux Enterprise Server 11 SP4-LTSS | Package registry (OSV) |
| suse:kernel-pae | 3.0.101-108.114.1 · SUSE:Linux Enterprise Server 11 SP4-LTSS | Package registry (OSV) |
| suse:kernel-ppc64 | 3.0.101-108.114.1 · SUSE:Linux Enterprise Server 11 SP4-LTSS | Package registry (OSV) |
| suse:kernel-source | 3.0.101-108.114.1 · SUSE:Linux Enterprise Server 11 SP4-LTSS | Package registry (OSV) |
| suse:kernel-source-azure | 4.12.14-16.16.1 · SUSE:Linux Enterprise Server 12 SP5 | Package registry (OSV) |
| suse:kernel-syms | 3.0.101-108.114.1 · SUSE:Linux Enterprise Server 11 SP4-LTSS | Package registry (OSV) |
| suse:kernel-syms-azure | 4.12.14-16.16.1 · SUSE:Linux Enterprise Server 12 SP5 | Package registry (OSV) |
| suse:kernel-trace | 3.0.101-108.114.1 · SUSE:Linux Enterprise Server 11 SP4-LTSS | Package registry (OSV) |
| suse:kernel-xen | 3.0.101-108.114.1 · SUSE:Linux Enterprise Server 11 SP4-LTSS | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-20-567 · Aug 4, 2020(Linux Kernel Güvenlik Güncellemesi)
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- Administrator privileges are required.
- No user action is required.
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- High
- Privileges required
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')CVSS vector
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (8 more)Show less
- cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.14
- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=28d76df18f0ad5bcf5fa48510b225f0ed262a99b
- github.com/torvalds/linux/commit/28d76df18f0ad5bcf5fa48510b225f0ed262a99b
- lists.debian.org/debian-lts-announce/2020/06/msg00011.html
- lists.debian.org/debian-lts-announce/2020/06/msg00012.html
- lists.debian.org/debian-lts-announce/2020/06/msg00013.html
- security.netapp.com/advisory/ntap-20200608-0001/
- www.debian.org/security/2020/dsa-4698
Vendor advisories and official records. Exploit/PoC links are deliberately left out.