CVE-2026-98037: Linux kernel · bpf: Reject untrusted allocated-object pointers
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in 7441ee8276641bddaf1cba7bb75ef9c1458ceb3b : patch Linux kernel soon.
Data as of 26 Oct 2026, 12:55 UTC
Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.2% 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 7441ee8276641bddaf1cba7bb75ef9c1458ceb3b, 135d542b97fa93e32c457d49d6e7b33ca7d05bae, 092c2874dc1b2060fa77a465a971acd4fdf87683 +1
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 7441ee8276641bddaf1cba7bb75ef9c1458ceb3b, 135d542b97fa93e32c457d49d6e7b33ca7d05bae, 092c2874dc1b2060fa77a465a971acd4fdf87683 or 6b1f786ad85a0b63393b76f5e634deab1a73198c.
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 and has been applied in the Linux kernel. Users should update to the fixed kernel versions identified by the commits 7441ee8276641bddaf1cba7bb75ef9c1458ceb3b, 135d542b97fa93e32c457d49d6e7b33ca7d05bae, 092c2874dc1b2060fa77a465a971acd4fdf87683, and 6b1f786ad85a0b63393b76f5e634deab1a73198c. No additional mitigation is required beyond applying these patches.
Description
A vulnerability in the Linux kernel's BPF subsystem allows dereferencing of untrusted or stale pointers after the end of an RCU read-side critical section. This occurs because certain pointer checks do not properly reject demoted PTR_UNTRUSTED pointers that retain MEM_ALLOC, potentially leading to dereferencing NULL or stale memory. The issue has been fixed by modifying type_is_ptr_alloc_obj() to reject PTR_UNTRUSTED pointers, ensuring that graph kfunc arguments meet live-object requirements.
References
- git.kernel.org/stable/c/092c2874dc1b2060fa77a465a971acd4fdf87683 (opens in a new tab)
- git.kernel.org/stable/c/135d542b97fa93e32c457d49d6e7b33ca7d05bae (opens in a new tab)
- git.kernel.org/stable/c/6b1f786ad85a0b63393b76f5e634deab1a73198c (opens in a new tab)
- git.kernel.org/stable/c/7441ee8276641bddaf1cba7bb75ef9c1458ceb3b (opens in a new tab)