CVE-2026-46174: x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache
Noroxi assessment
Priority: Monitor (action score 35/100)
- 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: 0.15% (FIRST EPSS).
- Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
- Fixed version: Linux Linux 1cd85a19748b2407830376a5cbae5c0f126016e5, 1e23b30a80b14e5764657401ee2cca030525ae8e, 251497955f2314cd39d43191e81c6151dead4c7b.
- Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Low priority for now. Upgrade to Linux Linux 1cd85a19748b2407830376a5cbae5c0f126016e5, 1e23b30a80b14e5764657401ee2cca030525ae8e, 251497955f2314cd39d43191e81c6151dead4c7b 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
In the Linux kernel, the following vulnerability has been resolved: x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache Make sure resources are not improperly shared in the op cache and cause instruction corruption this way.
- Published
- May 28, 2026
- Updated
- Oct 19, 2026
- EPSS
- 0.1% · 4th percentile
- CWE
- CWE-862
Report tools
Action score
35
Monitor
Low priority for now.
- CVSS
- 35 / 40 · 8.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.1%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · Linux
- 8.8
- NVD has not scored this yet; the score shown is the CNA’s.
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
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 kernel3.16.58 and later · before 3.17
- linux linux kernel4.4.144 and later · before 4.5
- linux linux kernel4.9.102 and later · before 4.10
- linux linux kernel4.14.1 and later · before 5.10.256
- linux linux kernel5.11 and later · before 5.15.207
- linux linux kernel5.16 and later · before 6.1.173
- linux linux kernel6.2 and later · before 6.6.139
- linux linux kernel6.7 and later · before 6.12.88
- linux linux kernel6.13 and later · before 6.18.30
- linux linux kernel6.19 and later · before 7.0.7
- linux linux kernel4.14
- linux linux kernel7.1
Versions reported by the vendor
Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.
Linux Linux
- 5abd1583e06b3963e5c9d915760367de86808b78, 4ba461d426490b6ed7e8298c4d3b7a13aa5d2686, 5a63725cd18fcee2af6ec46ccb856b64ad3077b4, 4.14affected
- f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 and later · before 1e23b30a80b14e5764657401ee2cca030525ae8eaffected · git
- f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 and later · before f5bc3aef7df46eaaf423d7413ab8833f704ae576affected · git
- f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 and later · before 251497955f2314cd39d43191e81c6151dead4c7baffected · git
- f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 and later · before ff6fc65b3bf73acc5ee71919154d830ad5431362affected · git
- f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 and later · before 9109489cc8c34e50d15575a3d1ff82af586bc1aaaffected · git
- f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 and later · before 28f5ed477eef166d678d6966762cbc1de9b4f436affected · git
- f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 and later · before 1cd85a19748b2407830376a5cbae5c0f126016e5affected · git
- f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 and later · before c21b90f77687075115d989e53a8ec5e2bb427ab1affected · git
- 3.16.58 and later · before 3.17affected · semver
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 6.1.174-1 | 6.1.174-1 |
| Debian:13 | linux | before 6.12.88-1 | 6.12.88-1 |
| Debian:14 | linux | before 7.0.7-1 | 7.0.7-1 |
| Rocky Linux:10 | kernel | before 0:6.12.0-211.72.1.el10_2 | 0:6.12.0-211.72.1.el10_2 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-64kb | before 5.14.21-150400.24.235.1 | 5.14.21-150400.24.235.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-docs | before 5.14.21-150400.24.235.1 | 5.14.21-150400.24.235.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-obs-build | before 5.14.21-150400.24.235.1 | 5.14.21-150400.24.235.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-syms | before 5.14.21-150400.24.235.1 | 5.14.21-150400.24.235.1 |
| SUSE:Linux Enterprise Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4_Update_58 | before 1-150400.9.7.1 | 1-150400.9.7.1 |
| SUSE:Linux Enterprise Micro 5.3 | kernel-default | before 5.14.21-150400.24.235.1 | 5.14.21-150400.24.235.1 |
| SUSE:Linux Enterprise Micro 5.3 | kernel-default-base | before 5.14.21-150400.24.235.1.150400.24.118.3 | 5.14.21-150400.24.235.1.150400.24.118.3 |
| SUSE:Linux Enterprise Micro 5.3 | kernel-rt | before 5.14.21-150400.15.181.1 | 5.14.21-150400.15.181.1 |
| SUSE:Linux Enterprise Micro 5.3 | kernel-source | before 5.14.21-150400.24.235.1 | 5.14.21-150400.24.235.1 |
| SUSE:Linux Enterprise Micro 5.3 | kernel-source-rt | before 5.14.21-150400.15.181.1 | 5.14.21-150400.15.181.1 |
| SUSE:Linux Enterprise Server 15 SP4-LTSS | kernel-zfcpdump | before 5.14.21-150400.24.235.1 | 5.14.21-150400.24.235.1 |
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV90Now
- CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV89Now
- CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV85Now
Published before and after this one in the same product
- ← EarlierCVE-2026-46172May 28, 2026 · ipv6: xfrm6: release dst on error in xfrm6_rcv_encap()22Monitor
- ← EarlierCVE-2026-46173May 28, 2026 · exit: prevent preemption of oopsing TASK_DEAD task31Monitor
- Later →CVE-2026-46175May 28, 2026 · f2fs: fix fsck inconsistency caused by FGGC of node block28Monitor
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 |
|---|---|---|
| Linux Linux | 1cd85a19748b2407830376a5cbae5c0f126016e5 | Vendor (CNA) |
| Linux Linux | 1e23b30a80b14e5764657401ee2cca030525ae8e | Vendor (CNA) |
| Linux Linux | 251497955f2314cd39d43191e81c6151dead4c7b | Vendor (CNA) |
| Linux Linux | 28f5ed477eef166d678d6966762cbc1de9b4f436 | Vendor (CNA) |
| Linux Linux | 3.17 | Vendor (CNA) |
| Linux Linux | 4.10 | Vendor (CNA) |
| Linux Linux | 4.5 | Vendor (CNA) |
| Linux Linux | 9109489cc8c34e50d15575a3d1ff82af586bc1aa | Vendor (CNA) |
| Linux Linux | c21b90f77687075115d989e53a8ec5e2bb427ab1 | Vendor (CNA) |
| Linux Linux | f5bc3aef7df46eaaf423d7413ab8833f704ae576 | Vendor (CNA) |
| Linux Linux | ff6fc65b3bf73acc5ee71919154d830ad5431362 | Vendor (CNA) |
| debian:linux | 6.1.174-1 · Debian:12 | Package registry (OSV) |
| rocky linux:kernel | 0:6.12.0-211.72.1.el10_2 · Rocky Linux:10 | Package registry (OSV) |
| suse:kernel-64kb | 5.14.21-150400.24.235.1 · SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | Package registry (OSV) |
| suse:kernel-default | 5.14.21-150400.24.235.1 · SUSE:Linux Enterprise Micro 5.3 | Package registry (OSV) |
| suse:kernel-default-base | 5.14.21-150400.24.235.1.150400.24.118.3 · SUSE:Linux Enterprise Micro 5.3 | Package registry (OSV) |
| suse:kernel-docs | 5.14.21-150400.24.235.1 · SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | Package registry (OSV) |
| suse:kernel-livepatch-SLE15-SP4_Update_58 | 1-150400.9.7.1 · SUSE:Linux Enterprise Live Patching 15 SP4 | Package registry (OSV) |
| suse:kernel-obs-build | 5.14.21-150400.24.235.1 · SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | Package registry (OSV) |
| suse:kernel-rt | 5.14.21-150400.15.181.1 · SUSE:Linux Enterprise Micro 5.3 | Package registry (OSV) |
| suse:kernel-source | 5.14.21-150400.24.235.1 · SUSE:Linux Enterprise Micro 5.3 | Package registry (OSV) |
| suse:kernel-source-rt | 5.14.21-150400.15.181.1 · SUSE:Linux Enterprise Micro 5.3 | Package registry (OSV) |
| suse:kernel-syms | 5.14.21-150400.24.235.1 · SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | Package registry (OSV) |
| suse:kernel-zfcpdump | 5.14.21-150400.24.235.1 · SUSE:Linux Enterprise Server 15 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.
No history yet (it accumulates with the daily EPSS job).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
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.
- CVE-2026-6382952 days apartnet: ip_gre: require CAP_NET_ADMIN in the device netns for changelink35Monitor
- CVE-2026-6392152 days apartip6: vti: Use ip6_tnl.net in vti6_siocdevprivate().35Monitor
- CVE-2026-6394152 days apartKVM: arm64: Correctly cap ZCR_EL2 provided by a guest hypervisor35Monitor
- CVE-2026-6404252 days apartvfio/pci: Check BAR resources before exporting a DMABUF35Monitor
- CVE-2026-3178864 days apartxen/privcmd: restrict usage in unprivileged domU32Monitor
- CVE-2026-460541 days apartselinux: fix overlayfs mmap() and mprotect() access checks28Monitor
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-26-0290 · Jun 2, 2026(Linux Kernel Güvenlik Bildirimi)
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
Impact can extend beyond the vulnerable component (scope changes).
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Changed
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-862 · Missing AuthorizationCVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Change log
- SSVC exploitation— → none
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (10 more)Show less
- git.kernel.org/stable/c/1e23b30a80b14e5764657401ee2cca030525ae8e
- git.kernel.org/stable/c/251497955f2314cd39d43191e81c6151dead4c7b
- git.kernel.org/stable/c/28f5ed477eef166d678d6966762cbc1de9b4f436
- git.kernel.org/stable/c/9109489cc8c34e50d15575a3d1ff82af586bc1aa
- git.kernel.org/stable/c/c21b90f77687075115d989e53a8ec5e2bb427ab1
- git.kernel.org/stable/c/f5bc3aef7df46eaaf423d7413ab8833f704ae576
- git.kernel.org/stable/c/ff6fc65b3bf73acc5ee71919154d830ad5431362
- cert-portal.siemens.com/productcert/html/ssa-019113.html
- cert-portal.siemens.com/productcert/html/ssa-082556.html
- cert-portal.siemens.com/productcert/html/ssa-457936.html
Vendor advisories and official records. Exploit/PoC links are deliberately left out.