VulnerabilityPublished 18 Oct 2026

CVE-2026-98725: Linux kernel · nvmet-auth: fix out-of-bounds write in nvmet_auth_challenge()

Source GCVE Database

Authoritative record:CVE-2026-98725

Not known to be exploited · fixed in fa6778e030bed9841ddcdf96bc7018da9ac03562 : patch Linux kernel soon.

Data as of 26 Oct 2026, 14:05 UTC

Severity

High

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.2% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in fa6778e030bed9841ddcdf96bc7018da9ac03562, ef4dfad231a787aded76e5b03788ddb18c8aebab, 9d61131acd742cf97ee64e453383e41b46568513 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Oct 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.

ghsa-h488-w8xm-x8gw

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ db1312dd95488b5e6ff362ff66fcf953a46b1821, < fa6778e030bed9841ddcdf96bc7018da9ac03562	Fixed in fa6778e030bed9841ddcdf96bc7018da9ac03562
LinuxLinux	Affected ≥ db1312dd95488b5e6ff362ff66fcf953a46b1821, < ef4dfad231a787aded76e5b03788ddb18c8aebab	Fixed in ef4dfad231a787aded76e5b03788ddb18c8aebab
LinuxLinux	Affected ≥ db1312dd95488b5e6ff362ff66fcf953a46b1821, < 9d61131acd742cf97ee64e453383e41b46568513	Fixed in 9d61131acd742cf97ee64e453383e41b46568513
LinuxLinux	Affected ≥ db1312dd95488b5e6ff362ff66fcf953a46b1821, < 8a9b4c0eef19c207663c1ee888257307c869ca86	Fixed in 8a9b4c0eef19c207663c1ee888257307c869ca86
LinuxLinux	Affected ≥ db1312dd95488b5e6ff362ff66fcf953a46b1821, < 7fd3c363eba4f2aceb4b3f31cd1cf65e0dcbaee4	Fixed in 7fd3c363eba4f2aceb4b3f31cd1cf65e0dcbaee4
LinuxLinux	Affected =6.0	Fixed in–

AI-suggested

A fix for this vulnerability has been implemented in the Linux kernel by correcting the buffer size calculation in nvmet_auth_challenge(). Users should apply the official kernel updates containing this fix when available. Patch status is not explicitly confirmed in the provided data; therefore, check the vendor's advisory for current remediation guidance.

Description

A vulnerability in the Linux kernel's nvmet-auth component caused an out-of-bounds write in the nvmet_auth_challenge() function due to incorrect buffer size calculation. This flaw could lead to memory corruption and kernel panic. The issue was identified and resolved by correcting the size calculation to use the typed challenge pointer. No CVSS score is available for this vulnerability.

References

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