CVE-2026-98728: Linux kernel · tpm: fix off-by-four bounds check in tpm2_get_random()
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in e30a2406408d2df6d9cd48c2e59e913cf266a05a : update Linux kernel when convenient.
Data as of 26 Oct 2026, 14:05 UTC
Rated Low by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in e30a2406408d2df6d9cd48c2e59e913cf266a05a, be54101992c2c5218be0e0a87827ccc96e3089af, 42bb6216b861e892512128219ff23010d656ba14 +1
Exploitation evidence
Disclosed: evidence found.
CVE published 18 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 e30a2406408d2df6d9cd48c2e59e913cf266a05a, be54101992c2c5218be0e0a87827ccc96e3089af, 42bb6216b861e892512128219ff23010d656ba14 or 9b522400bf5c082feb9a0037a053ea822a2c7e4d.
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
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| LinuxLinux | Affected
| Fixed in– |
Linuxlinux/kernelpkg:rpm/linux/kernelOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix is available and has been applied in the Linux kernel after version 6.10, as indicated by the provided commit hashes. Users and administrators should update their Linux kernel to a fixed version containing these commits to remediate the vulnerability.
Description
A vulnerability in the Linux kernel's TPM subsystem was fixed to address an off-by-four bounds check error in the tpm2_get_random() function. The flaw allowed memcpy() to read up to 4 bytes beyond the end of a truncated TPM response, potentially leaking stale buffer contents as random bytes. The issue was corrected by adjusting the bounds check to properly account for the parameter size field in the response.
References
- git.kernel.org/stable/c/be54101992c2c5218be0e0a87827ccc96e3089af (opens in a new tab)
- git.kernel.org/stable/c/e30a2406408d2df6d9cd48c2e59e913cf266a05a (opens in a new tab)
- git.kernel.org/stable/c/42bb6216b861e892512128219ff23010d656ba14 (opens in a new tab)
- git.kernel.org/stable/c/9b522400bf5c082feb9a0037a053ea822a2c7e4d (opens in a new tab)