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CVE-2026-80605— HID: picolcd: prevent NULL pointer dereference in picolcd_send_and_wait()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel 存在安全漏洞，该漏洞源于picolcd_send_and_wait()函数中的带符号循环计数器整数溢出，可能导致空指针解引用。

AI Predicted 5.5 Difficulty: Theoretical EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1017

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205< 42dc0b7b55fe0499fc09183f34a1c46d1dcccf77 affected
fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205< 48caee2c106b03301c72fe389ebff00d852c58d5 affected
fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205< dc176447c7279435c46735db7da81aed1ec25cc2 affected
fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205< a02d5d7ad7ae5fa3756b8332f7350e973085dcb3 affected
fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205< e4edeefb8d5bfceb2058e2b3291f4ae1e5a76e61 affected
fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205< d354e523c6f740db758cafcd4c11bb7913285ed8 affected
fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205< ef649703dce0df1364fcec3cdad9b32d1c522939 affected
fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205< 0021eb09041f021c079be1022934a280f7f176c0 affected
… +10 more rows
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I. Basic Information for CVE-2026-80605

Vulnerability Information
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Vulnerability Title
HID: picolcd: prevent NULL pointer dereference in picolcd_send_and_wait()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: HID: picolcd: prevent NULL pointer dereference in picolcd_send_and_wait() In picolcd_send_and_wait(), an integer overflow of the signed loop counter 'k' can theoretically lead to a NULL pointer dereference of 'raw_data'. If the loop executes more than INT_MAX times, 'k' becomes negative, making the condition 'k < size' true even when 'size' is 0. Change the type of 'k' to 'unsigned int' to prevent the overflow and eliminate the out-of-bounds access. Found by Linux Verification Center (linuxtesting.org) with the Svace static analysis tool. [jkosina@suse.com: extended hash length]
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel 存在安全漏洞，该漏洞源于picolcd_send_and_wait()函数中的带符号循环计数器整数溢出，可能导致空指针解引用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 ~ 42dc0b7b55fe0499fc09183f34a1c46d1dcccf77 -
Linux Linux 3.7 -

II. Public POCs for CVE-2026-80605

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III. Intelligence Information for CVE-2026-80605

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Patches & Fixes for CVE-2026-80605 (8)

Same Patch Batch · Linux · 2026-08-28 · 135 CVEs total

CVE-2026-80634 9.8 CRITICAL netfilter: flowtable: avoid num_encaps underflow on bridge VLAN untag
CVE-2026-80694 9.8 CRITICAL net: ethernet: mtk_eth_soc: pass eth to mtk_handle_irq_rx in poll_controller
CVE-2026-80681 9.8 CRITICAL vxlan: re-fetch eth header after route_shortcircuit()
CVE-2026-80674 9.8 CRITICAL ntfs: validate resident attribute lists and harden the validator
CVE-2026-80673 9.8 CRITICAL ntfs: bound the look-ahead attribute-list entry in ntfs_external_attr_find()
CVE-2026-80668 9.8 CRITICAL netfilter: nf_conntrack_expect: use conntrack GC to reap expectations
CVE-2026-80630 9.8 CRITICAL net/sched: sch_fq_codel: Do not call qdisc_tree_reduce_backlog during peek before restorin
CVE-2026-80617 9.8 CRITICAL net: airoha: fix foe_check_time allocation size
CVE-2026-80612 9.8 CRITICAL net: lwtunnel: Drop skb metadata before LWT encapsulation
CVE-2026-80714 9.8 CRITICAL ipvs: do not propagate one-packet flag to synced conns
CVE-2026-80609 9.8 CRITICAL qede: fix out-of-bounds check for cqe->len_list[]
CVE-2026-80600 9.8 CRITICAL batman-adv: dat: acquire ARP hw source only after skb realloc
CVE-2026-80693 9.3 CRITICAL idpf: bound interrupt-vector register fill to the allocated array
CVE-2026-80684 9.3 CRITICAL KVM: s390: pci: Fix NULL dereference on AIBV allocation failure
CVE-2026-80671 9.3 CRITICAL perf sched: Fix register_pid() overflow, strcpy, and BUG_ON
CVE-2026-80603 9.1 CRITICAL netfilter: nf_conntrack_irc: fix parse_dcc() off-by-one OOB read
CVE-2026-80670 9.1 CRITICAL perf tools: Use perf_env__get_cpu_topology() in machine__resolve()
CVE-2026-80721 8.8 HIGH Bluetooth: ISO: ensure no dangling hcon references in iso_conn
CVE-2026-80722 8.8 HIGH wifi: mac80211: validate individual TWT params before driver setup
CVE-2026-80724 8.8 HIGH ptp: vmclock: prevent read-only mappings from becoming writable

Showing top 20 of 135 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-80605

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