VulnerabilityPublished 28 Oct 2026

CVE-2026-99113: Linux kernel · ksmbd: zero the FS_OBJECT_ID_INFORMATION buffer before filling it in

Source GCVE Database

Authoritative record:CVE-2026-99113

Not known to be exploited · fixed in 898cb4f2e12a5ddea1b2d821cc642c3100f46da7 : update Linux kernel when convenient.

Data as of 28 Oct 2026, 14:15 UTC

Severity

Medium

Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD

Patch: Available – fixed in 898cb4f2e12a5ddea1b2d821cc642c3100f46da7, 399aa12450a61a5c73dc77e73f069ece9687c95d, 015fffa48e96ca8d73a627445341ccff86b02251

Exploitation evidence

Disclosed: evidence found.
CVE published 28 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-3hcx-97mc-6xww

What to do

Upgrade Linux kernel to 898cb4f2e12a5ddea1b2d821cc642c3100f46da7, 399aa12450a61a5c73dc77e73f069ece9687c95d or 015fffa48e96ca8d73a627445341ccff86b02251.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < 898cb4f2e12a5ddea1b2d821cc642c3100f46da7	Fixed in 898cb4f2e12a5ddea1b2d821cc642c3100f46da7
LinuxLinux	Affected ≥ e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < 399aa12450a61a5c73dc77e73f069ece9687c95d	Fixed in 399aa12450a61a5c73dc77e73f069ece9687c95d
LinuxLinux	Affected ≥ e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < 015fffa48e96ca8d73a627445341ccff86b02251	Fixed in 015fffa48e96ca8d73a627445341ccff86b02251
LinuxLinux	Affected =5.15	Fixed in–

AI-suggested

A fix has been implemented in the Linux kernel to zero the FS_OBJECT_ID_INFORMATION buffer before filling it, preventing residual data leakage. Users should apply the official kernel update containing this fix once available. Since this is a kernel vulnerability, updating to the patched kernel version is the recommended remediation.

Description

A vulnerability in the Linux kernel's ksmbd component involves improper clearing of the FS_OBJECT_ID_INFORMATION buffer before filling it. This can cause up to 31 bytes of unintended data from previous responses to be leaked to the client in compound SMB2 requests. The issue arises because only part of the buffer is overwritten, and the remaining bytes may contain residual data from earlier commands, potentially exposing sensitive information.

References

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