CVE-2026-97565: Linux kernel · smb: client: reject short READ responses in CIFSSMBRead()
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in e6142a8bfc230c7263eb8b0475249c958ce49367 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 14:05 UTC
Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.1% 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 e6142a8bfc230c7263eb8b0475249c958ce49367, aaa221c1b1d288845b55e9c366e5ef608dfff49d, 0f1f77b821506a4dacab6ce7d29cf9e0c26f14cd
Exploitation evidence
Disclosed: evidence found.
CVE published 25 Sep 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.
What to do
Upgrade Linux kernel to e6142a8bfc230c7263eb8b0475249c958ce49367, aaa221c1b1d288845b55e9c366e5ef608dfff49d or 0f1f77b821506a4dacab6ce7d29cf9e0c26f14cd.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in– |
AI-suggested
A fix is available and has been applied in the Linux kernel. The patch rejects READ responses shorter than the expected header size, preventing out-of-bounds reads. Users should update their Linux kernel to a version including the fix identified by commits e6142a8bfc230c7263eb8b0475249c958ce49367, aaa221c1b1d288845b55e9c366e5ef608dfff49d, or 0f1f77b821506a4dacab6ce7d29cf9e0c26f14cd. Additionally, avoid using SMB1 mounts unless absolutely necessary, as SMB1 is deprecated and not negotiated by default.
Description
A vulnerability in the Linux kernel SMB client allows a malicious SMB1 server to send short READ responses that cause the client to read beyond the buffer boundary in CIFSSMBRead(). This occurs because the function does not verify the response length before accessing header fields. The issue affects explicit SMB1 mounts, as SMB1 is not negotiated by default. The vulnerability has been fixed by rejecting responses shorter than the expected READ_RSP size.