CVE-2026-98170
smb: client: fix OOB struct field reads in move_smb2_ea_to_cifs()
No known exploitation. EPSS puts it in the 9th percentile. Fixed versions are out.
What to do
Find your product and version, then upgrade to the build on the right.
- LinuxAffected: ≥ 95907fea4fd8ccc736e0a428e52159b4d42b9958, < d3546cecbf81d98bf3b472d341f981eb48c04f47Upgrade to: d3546cecbf81d98bf3b472d341f981eb48c04f47Affected: ≥ 95907fea4fd8ccc736e0a428e52159b4d42b9958, < 34a3942e787b9c59758115bd65fe1ec89d68c7a4Upgrade to: 34a3942e787b9c59758115bd65fe1ec89d68c7a4Affected: ≥ 95907fea4fd8ccc736e0a428e52159b4d42b9958, < 13efcd37a9b3d6ffa1579c3dda3e29c893ed9bcaUpgrade to: 13efcd37a9b3d6ffa1579c3dda3e29c893ed9bcaAffected: ≥ 95907fea4fd8ccc736e0a428e52159b4d42b9958, < eeb5ef6083e1cefa2ef75041b5597ff228b8d7bbUpgrade to: eeb5ef6083e1cefa2ef75041b5597ff228b8d7bbStated by: CVE record
Versions as the sources state them. Full version matrix after sign-in
What it is
From the CVE record
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".
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.2% chance of exploitation activity in the next 30 days, which ranks it in the 9th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
2 events over 0 days, from the signal feeds we watch.
- Publishedrecord updated
Affected products
Sources
References in the record
- git.kernel.org/stable/c/13efcd37a9b3d6ffa1579c3dda3e29c893ed9bca
- git.kernel.org/stable/c/34a3942e787b9c59758115bd65fe1ec89d68c7a4
- git.kernel.org/stable/c/d3546cecbf81d98bf3b472d341f981eb48c04f47
And 1 more reference. See all after sign-in
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