VulnerabilityPublished 28 May 2026Updated 21 Oct 2026

CVE-2026-46171: Linux kernel · riscv: kvm: fix vector context allocation leak

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in bd62c0f61bc722a097417401030c596cea8e21aa : update Linux kernel when convenient.

Data as of 26 Oct 2026, 12:55 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS: 0.1% chance of exploitation in 30 days – higher than 2% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in bd62c0f61bc722a097417401030c596cea8e21aa, b7c958d7c1eb1cb9b2be7b5ee4129fcd66cec978, 70ecebe7c58ce01f8da3f513eafb51bd147b1e63 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 28 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 0f4b82579716b12bb88257bd7ea80f25c791fb2c, < bd62c0f61bc722a097417401030c596cea8e21aa	Fixed in bd62c0f61bc722a097417401030c596cea8e21aa
LinuxLinux	Affected ≥ 0f4b82579716b12bb88257bd7ea80f25c791fb2c, < b7c958d7c1eb1cb9b2be7b5ee4129fcd66cec978	Fixed in b7c958d7c1eb1cb9b2be7b5ee4129fcd66cec978
LinuxLinux	Affected ≥ 0f4b82579716b12bb88257bd7ea80f25c791fb2c, < 70ecebe7c58ce01f8da3f513eafb51bd147b1e63	Fixed in 70ecebe7c58ce01f8da3f513eafb51bd147b1e63
LinuxLinux	Affected ≥ 0f4b82579716b12bb88257bd7ea80f25c791fb2c, < 8f3a5dc4055e1001b44ca8ae2bd3eb1d07782049	Fixed in 8f3a5dc4055e1001b44ca8ae2bd3eb1d07782049
LinuxLinux	Affected ≥ 0f4b82579716b12bb88257bd7ea80f25c791fb2c, < 1d57ab45ec5c0e22789de793bcf2a31ad6fb7d98	Fixed in 1d57ab45ec5c0e22789de793bcf2a31ad6fb7d98
LinuxLinux	Affected =6.5	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: riscv: kvm: fix vector context allocation leak When the second kzalloc (host_context.vector.datap) fails in kvm_riscv_vcpu_alloc_vector_context, the first allocation (guest_context.vector.datap) is leaked. Free it before returning.

References

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