CVE-2026-72028: Linux kernel · riscv: probes: save original sp in rethook trampoline
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in d21109fe4a55247094f913773a334772907cd016 : update Linux kernel when convenient.
Data as of 30 Oct 2026, 13:33 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 d21109fe4a55247094f913773a334772907cd016, c386e1c591d72eab58ee2e69105c8cbc70928857, bc7b086a45521a986a49045907f017e3e46c763e +3
Exploitation evidence
Disclosed: evidence found.
CVE published 15 Aug 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 is available and has been applied in specific Linux kernel commits and versions. Systems running the affected Linux kernel version 5.12 should upgrade to a fixed version containing the patch identified by the listed commit hashes. No additional mitigation is required once patched.
Description
A vulnerability in the Linux kernel's riscv architecture probes subsystem caused a kernel crash when reading a word from the stack in a kretprobe. The issue was due to the original stack pointer (sp) not being saved in the rethook trampoline, leading to an invalid memory access and kernel panic. This flaw was fixed by saving the original sp along with other registers in the trampoline code.
References
- git.kernel.org/stable/c/d21109fe4a55247094f913773a334772907cd016 (opens in a new tab)
- git.kernel.org/stable/c/5da5cf48a432e30ded8d58087854e5383a36eff1 (opens in a new tab)
- git.kernel.org/stable/c/c386e1c591d72eab58ee2e69105c8cbc70928857 (opens in a new tab)
- git.kernel.org/stable/c/2faf0198168d2017cb528a79f76c560fda3b6e94 (opens in a new tab)
- git.kernel.org/stable/c/91b4d76dd07f1a1f20f73dfebb42ba04ac911a56 (opens in a new tab)
- git.kernel.org/stable/c/bc7b086a45521a986a49045907f017e3e46c763e (opens in a new tab)