VulnerabilityPublished 6 Oct 2026Updated 21 Oct 2026

CVE-2026-98170: Linux kernel · smb: client: fix OOB struct field reads in move_smb2_ea_to_cifs()

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in eeb5ef6083e1cefa2ef75041b5597ff228b8d7bb : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:18 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in eeb5ef6083e1cefa2ef75041b5597ff228b8d7bb, d3546cecbf81d98bf3b472d341f981eb48c04f47, 61812323c037a94e2e7f0db7ee740c34b126bffe +2

Exploitation evidence

Disclosed: evidence found.
CVE published 6 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.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 95907fea4fd8ccc736e0a428e52159b4d42b9958, < eeb5ef6083e1cefa2ef75041b5597ff228b8d7bb	Fixed in eeb5ef6083e1cefa2ef75041b5597ff228b8d7bb
LinuxLinux	Affected ≥ 95907fea4fd8ccc736e0a428e52159b4d42b9958, < d3546cecbf81d98bf3b472d341f981eb48c04f47	Fixed in d3546cecbf81d98bf3b472d341f981eb48c04f47
LinuxLinux	Affected ≥ 95907fea4fd8ccc736e0a428e52159b4d42b9958, < 61812323c037a94e2e7f0db7ee740c34b126bffe	Fixed in 61812323c037a94e2e7f0db7ee740c34b126bffe
LinuxLinux	Affected ≥ 95907fea4fd8ccc736e0a428e52159b4d42b9958, < 34a3942e787b9c59758115bd65fe1ec89d68c7a4	Fixed in 34a3942e787b9c59758115bd65fe1ec89d68c7a4
LinuxLinux	Affected ≥ 95907fea4fd8ccc736e0a428e52159b4d42b9958, < 13efcd37a9b3d6ffa1579c3dda3e29c893ed9bca	Fixed in 13efcd37a9b3d6ffa1579c3dda3e29c893ed9bca
LinuxLinux	Affected =4.14	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix OOB struct field reads in move_smb2_ea_to_cifs() In move_smb2_ea_to_cifs(), the while (src_size > 0) loop condition is insufficient. It allows iteration to continue even if the remaining src_size is too small to contain a complete smb2_ea_info structure. Consequently, reads of ea_name_length and ea_value_length can occur out-of-bounds. Fix this by ensuring src_size >= sizeof(*src) before attempting to read any structure fields. Additionally, reject any next_entry_offset that is smaller than sizeof(*src) or that would advance the pointer beyond the available buffer. Note that for calls where the server returns a malformed EA list, the error returned to userspace changes from -ENODATA (getxattr) or -ERANGE (listxattr) to -EIO. This correctly signals a server protocol error rather than misleadingly indicating "attribute not present" or "output buffer too small".

References

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