CVE-2026-98222: Linux kernel · KEYS: encrypted: fix integer overflow of datablob_len
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in cca38f2102a4cd35eda8d48950df4817b4b24757 : patch Linux kernel soon.
Data as of 26 Oct 2026, 13:47 UTC
Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in cca38f2102a4cd35eda8d48950df4817b4b24757, a1a98eca102b1cbbc37ff9eaa197ae4e6a3ea4b0, 8697c431e297eb0d0ab13dda6bc172b48a34f05c +1
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.
What to do
Upgrade Linux kernel to cca38f2102a4cd35eda8d48950df4817b4b24757, a1a98eca102b1cbbc37ff9eaa197ae4e6a3ea4b0, 8697c431e297eb0d0ab13dda6bc172b48a34f05c or 1e720f63dbafc093a8f5d519f05b67724993edd4.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
|
| 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 in the Linux kernel, as indicated by multiple fixed commit versions. Users should update to a kernel version that includes these fixes to mitigate the vulnerability. No additional mitigation steps are required beyond applying the official patch.
Description
A vulnerability in the Linux kernel's encrypted keys subsystem involves an integer overflow in the datablob_len field, which is stored as a 16-bit unsigned integer. This overflow can cause an allocation size truncation leading to a slab-out-of-bounds write when copying the master key description. The issue is addressed by adding overflow checks and using safer allocation methods.
References
- git.kernel.org/stable/c/1e720f63dbafc093a8f5d519f05b67724993edd4 (opens in a new tab)
- git.kernel.org/stable/c/a1a98eca102b1cbbc37ff9eaa197ae4e6a3ea4b0 (opens in a new tab)
- git.kernel.org/stable/c/cca38f2102a4cd35eda8d48950df4817b4b24757 (opens in a new tab)
- git.kernel.org/stable/c/8697c431e297eb0d0ab13dda6bc172b48a34f05c (opens in a new tab)