CVE-2026-98599: Linux kernel · bpf: Reject non-negative offsets in stack_slot_obj_get_spi()
Affects Linux kernelSource CVE Database V5
Not known to be exploited : upgrade to 89a7241fc7ecc1b5e47c3f071081e314523b8d9d or 79a9172f3ab4ad8392c5e5c8944b9b7710ade620 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 8% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 89a7241fc7ecc1b5e47c3f071081e314523b8d9d, 79a9172f3ab4ad8392c5e5c8944b9b7710ade620
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 89a7241fc7ecc1b5e47c3f071081e314523b8d9d or 79a9172f3ab4ad8392c5e5c8944b9b7710ade620.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in– |
AI-suggested
The vulnerability has been fixed in the Linux kernel by rejecting non-negative offsets in stack_slot_obj_get_spi(). Users should update to the fixed kernel versions identified by commits 89a7241fc7ecc1b5e47c3f071081e314523b8d9d and 79a9172f3ab4ad8392c5e5c8944b9b7710ade620. No additional mitigation is required once the patch is applied.
Description
A vulnerability in the Linux kernel's BPF subsystem allows non-negative offsets in stack_slot_obj_get_spi(), which can cause incorrect validation of pointers to stack memory. This flaw permits a pointer to the current frame pointer (fp+0) to be validated against an iterator stored at a different stack location (fp-8), potentially allowing a kernel function to interpret memory outside the intended BPF stack region as iterator state. The issue has been fixed by rejecting non-negative offsets before converting them to stack pointer indices.