high Known exploitedREV. 01
CVE-2026-46300Linux Kernel — Lost Shared-Fragment Marker Corrupts Page Cache
When the Linux kernel merges socket buffers it can lose the marker for shared memory fragments, so encrypted packet processing decrypts in place over page-cache data. It can be chained with CVE-2026-109618 and CVE-2026-109619 to run commands as root.
Read the risk
THE VITAL STATS- CVSS score
- 7.8/ 10 CVSS v3.1
- EPSS probability
- 16.1% Likelihood of exploitation
- Attack complexity
- Low Conditions needed to exploit
- Known exploited
- Yes — CISA KEV
- CVE published
- 2026-05-23
- Added to KEV
- 2026-10-28
- CISA due date
- 2026-10-31
- Exploit published
- Not recorded
- Confidence
- high
- Kill chain
- privilege escalation
- MITRE ATT&CK
- T1068
- Severity
- high
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attacker needsLocal access with low privileges on the Linux host.
Behind the card
5 REFERENCES- 01CVE recordNVD recordnvd.nist.gov
- 02CISACISA Known Exploited Vulnerabilities catalogcisa.gov
- 03Vendor advisorygit.kernel.orggit.kernel.org
- 04Vendor advisorygit.kernel.orggit.kernel.org
- 05Vendor advisorygit.kernel.orggit.kernel.org
Field-level provenanceTRACE THE SOURCES +
Which source supports each field, when it was retrieved, and who extracted it.
| Fields | Source | Retrieved | Extractor | Confidence |
|---|---|---|---|---|
| cvss, exploitation.attack_complexity, exploitation.exploit_available, published_at, references | nvd.nist.gov | 2026-11-05 | scrty-crds-pipeline/0.1 | high |
| exploitation.known_exploited, exploitation.kev_added, exploitation.kev_due | cisa.gov | 2026-11-05 | scrty-crds-pipeline/0.1 | high |
| epss | api.first.org | 2026-11-05 | scrty-crds-pipeline/0.1 | high |
| title, subtitle, summary, severity, remediation, mitre_attack, kill_chain, recommended_action, confidence, tags, exploitation.prerequisites | nvd.nist.gov | 2026-11-05 | claude-code | high |
Printing history
THE RECORD- r1Initial base card
History unavailable — this build has no Git history for the card file.