CVE-2026-80605: Linux kernel · HID: picolcd: prevent NULL pointer dereference in picolcd_send_and_wait()
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in ef649703dce0df1364fcec3cdad9b32d1c522939 : update Linux kernel when convenient.
Data as of 6 Nov 2026, 17:47 UTC
Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD
Thin evidence
One scorer or none- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers cannot reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-11-06.
- Patch
- Available – fixed in ef649703dce0df1364fcec3cdad9b32d1c522939, e4edeefb8d5bfceb2058e2b3291f4ae1e5a76e61, dc176447c7279435c46735db7da81aed1ec25cc2 +5
Exploitation evidence
Disclosed: evidence found.
CVE published 28 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 6 Nov 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 multiple commits to the Linux kernel. Users and administrators should update to a Linux kernel version that includes these fixes. Since this is a kernel-level vulnerability, applying the official patch or upgrading to a fixed kernel version is the recommended mitigation.
Description
A vulnerability in the Linux kernel's HID picolcd driver could cause a NULL pointer dereference due to an integer overflow in the loop counter within the picolcd_send_and_wait() function. This occurs if the loop executes more than INT_MAX times, causing the signed integer to become negative and leading to out-of-bounds access. The issue has been fixed by changing the loop counter to an unsigned integer to prevent overflow.
References
- git.kernel.org/stable/c/42dc0b7b55fe0499fc09183f34a1c46d1dcccf77 (opens in a new tab)
- git.kernel.org/stable/c/48caee2c106b03301c72fe389ebff00d852c58d5 (opens in a new tab)
- git.kernel.org/stable/c/dc176447c7279435c46735db7da81aed1ec25cc2 (opens in a new tab)
- git.kernel.org/stable/c/a02d5d7ad7ae5fa3756b8332f7350e973085dcb3 (opens in a new tab)
- git.kernel.org/stable/c/e4edeefb8d5bfceb2058e2b3291f4ae1e5a76e61 (opens in a new tab)
- git.kernel.org/stable/c/d354e523c6f740db758cafcd4c11bb7913285ed8 (opens in a new tab)
- git.kernel.org/stable/c/ef649703dce0df1364fcec3cdad9b32d1c522939 (opens in a new tab)
- git.kernel.org/stable/c/0021eb09041f021c079be1022934a280f7f176c0 (opens in a new tab)