CVE-2026-93239: Linux kernel · arm64: mm: Fix the lockless page-table walk in show_pte()
Source GCVE Database
Not known to be exploited · fixed in e1b06278a7e241da0cd3187871e67255f956d184 : update Linux kernel when convenient.
Data as of 30 Oct 2026, 18:02 UTC
Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD
Thin evidence
One scorer or none- Patch
- Available – fixed in e1b06278a7e241da0cd3187871e67255f956d184, b3535b6cb2c48f97b8c3378eb9ea12538425bf14, b28fe65a36b8209b6adcf2722c7ce974cf9ac8d1 +5
Exploitation evidence
Disclosed: evidence found.
CVE published 24 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 30 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
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
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| LinuxLinux | Affected
| Fixed in
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AI-suggested
A fix has been implemented in the Linux kernel to address this issue by modifying show_pte() to use lockless offset helpers with saved parent entries and disabling local interrupts during the page-table walk. Users should apply the official kernel updates containing this fix when available. There is no indication that additional mitigation steps are required beyond applying the patch.
Description
CVE-2026-93239 is a vulnerability in the Linux kernel's arm64 memory management subsystem involving a lockless page-table walk in the show_pte() function. The flaw allows a concurrent teardown to free a page table while it is being walked, potentially causing the function to dereference a released page or derive an invalid pointer. The issue is addressed by using lockless offset helpers with saved parent entries and disabling local interrupts during the walk to prevent concurrent frees. This fix reduces the risk of faults caused by accessing freed memory during page-table walks.
References
- nvd.nist.gov/vuln/detail/CVE-2026-93239 (opens in a new tab)
- git.kernel.org/stable/c/08d931a0a850ad16a64f2cd23a19f40795cdbdf7 (opens in a new tab)
- git.kernel.org/stable/c/0f05d95b99164a9ccc4cf4a4920e0ff0228138ad (opens in a new tab)
- git.kernel.org/stable/c/68cbd70795dd8c06e7ccdc4eb0b74c5b180076c3 (opens in a new tab)
- git.kernel.org/stable/c/a77644d009dece1104b6fcc6e322b0e4503db0d6 (opens in a new tab)
- git.kernel.org/stable/c/b28fe65a36b8209b6adcf2722c7ce974cf9ac8d1 (opens in a new tab)
- git.kernel.org/stable/c/b3535b6cb2c48f97b8c3378eb9ea12538425bf14 (opens in a new tab)
- git.kernel.org/stable/c/b8f06b73ad146d84a33c124563c93eeef4f5b674 (opens in a new tab)
- git.kernel.org/stable/c/e1b06278a7e241da0cd3187871e67255f956d184 (opens in a new tab)