CVE-2026-23298— can: ucan: Fix infinite loop from zero-length messages
Possible ATT&CK Techniques 1AI
T1499 · Endpoint Denial of ServiceAffected Version Matrix 18
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 9f2d3eae88d26c29d96e42983b755940d9169cd9< ca07d3c6eef14d34e6fdeefe55058db045be29dc | affected |
9f2d3eae88d26c29d96e42983b755940d9169cd9< e7bb6e0606b5f233531aaaad9542d69fbb792115 | affected | ||
9f2d3eae88d26c29d96e42983b755940d9169cd9< ab6f075492d37368b4c7b0df7f7fdc2b666887fc | affected | ||
9f2d3eae88d26c29d96e42983b755940d9169cd9< 13b646eec3ba1131180803f5aaf1fee23540ad8f | affected | ||
9f2d3eae88d26c29d96e42983b755940d9169cd9< bd85f21a6219aeae4389d700c54f1799f4b814e0 | affected | ||
9f2d3eae88d26c29d96e42983b755940d9169cd9< aa9e0a7fe5efc2f74327fd37d828e9a51d9ff588 | affected | ||
9f2d3eae88d26c29d96e42983b755940d9169cd9< c7bc62be6c1a60bb21301692009590b1ffda91d9 | affected | ||
9f2d3eae88d26c29d96e42983b755940d9169cd9< 1e446fd0582ad8be9f6dafb115fc2e7245f9bea7 | affected | ||
| … +10 more rows | |||
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I. Basic Information for CVE-2026-23298
Vulnerability Information
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Vulnerability Title
can: ucan: Fix infinite loop from zero-length messages
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: can: ucan: Fix infinite loop from zero-length messages If a broken ucan device gets a message with the message length field set to 0, then the driver will loop for forever in ucan_read_bulk_callback(), hanging the system. If the length is 0, just skip the message and go on to the next one. This has been fixed in the kvaser_usb driver in the past in commit 0c73772cd2b8 ("can: kvaser_usb: leaf: Fix potential infinite loop in command parsers"), so there must be some broken devices out there like this somewhere.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于零长度消息处理不当，可能导致无限循环和系统挂起。
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
II. Public POCs for CVE-2026-23298
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-23298 (6)
Same Patch Batch · Linux · 2026-03-25 · 116 CVEs total
| CVE-2026-23395 | 8.8 HIGH | Bluetooth: L2CAP: Fix accepting multiple L2CAP_ECRED_CONN_REQ |
| CVE-2026-31788 | 8.2 HIGH | xen/privcmd: restrict usage in unprivileged domU |
| CVE-2026-23280 | 7.8 HIGH | accel/amdxdna: Prevent ubuf size overflow |
| CVE-2026-23317 | 7.8 HIGH | drm/vmwgfx: Return the correct value in vmw_translate_ptr functions |
| CVE-2026-23393 | 7.8 HIGH | bridge: cfm: Fix race condition in peer_mep deletion |
| CVE-2026-23392 | 7.8 HIGH | netfilter: nf_tables: release flowtable after rcu grace period on error |
| CVE-2026-23391 | 7.8 HIGH | netfilter: xt_CT: drop pending enqueued packets on template removal |
| CVE-2026-23340 | 7.8 HIGH | net: sched: avoid qdisc_reset_all_tx_gt() vs dequeue race for lockless qdiscs |
| CVE-2026-23372 | 7.8 HIGH | nfc: rawsock: cancel tx_work before socket teardown |
| CVE-2026-23306 | 7.8 HIGH | scsi: pm8001: Fix use-after-free in pm8001_queue_command() |
| CVE-2026-23288 | 7.8 HIGH | accel/amdxdna: Fix out-of-bounds memset in command slot handling |
| CVE-2026-23378 | 7.8 HIGH | net/sched: act_ife: Fix metalist update behavior |
| CVE-2026-23336 | 7.8 HIGH | wifi: cfg80211: cancel rfkill_block work in wiphy_unregister() |
| CVE-2026-23351 | 7.8 HIGH | netfilter: nft_set_pipapo: split gc into unlink and reclaim phase |
| CVE-2026-23383 | 7.8 HIGH | bpf, arm64: Force 8-byte alignment for JIT buffer to prevent atomic tearing |
| CVE-2026-23350 | 7.8 HIGH | drm/xe/queue: Call fini on exec queue creation fail |
| CVE-2026-23364 | 7.4 HIGH | ksmbd: Compare MACs in constant time |
| CVE-2026-23294 | 7.0 HIGH | bpf: Fix race in devmap on PREEMPT_RT |
| CVE-2026-23358 | drm/amdgpu: Fix error handling in slot reset | |
| CVE-2026-23357 | can: mcp251x: fix deadlock in error path of mcp251x_open |
Showing top 20 of 116 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-45836
Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_get_sndti - CVE-2026-45835
Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_new_conne - CVE-2026-45834
Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_state_cha - CVE-2026-46300
net: skbuff: preserve shared-frag marker during coalescing - CVE-2026-43503
net: skbuff: propagate shared-frag marker through frag-trans
Same vendor: Linux
- CVE-2026-45836
Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_get_sndti - CVE-2026-45835
Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_new_conne - CVE-2026-45834
Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_state_cha - CVE-2026-46300
net: skbuff: preserve shared-frag marker during coalescing - CVE-2026-43503
net: skbuff: propagate shared-frag marker through frag-trans
V. Comments for CVE-2026-23298
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