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CVE-2023-53049— usb: ucsi: Fix NULL pointer deref in ucsi_connector_change()

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ucsi_connector_change函数未检查ucsi初始化状态，可能导致空指针取消引用。

AI Predicted 5.5 Difficulty: Hard EPSS 0.20% · P10

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux bdc62f2bae8fb0e8e99574de5232f0a3c54a27df< a6adfe9bbd6ac11e398b54ccd99a0f8eea09f3c0 affected
bdc62f2bae8fb0e8e99574de5232f0a3c54a27df< 7dd27aed9c456670b3882877ef17a48195f21693 affected
bdc62f2bae8fb0e8e99574de5232f0a3c54a27df< 1c5abcb13491da8c049f20462189c12c753ba978 affected
bdc62f2bae8fb0e8e99574de5232f0a3c54a27df< 7ef0423e43f877a328454059d46763043ce3da44 affected
bdc62f2bae8fb0e8e99574de5232f0a3c54a27df< f87fb985452ab2083967103ac00bfd68fb182764 affected
5.5 affected
< 5.5 unaffected
5.10.177≤ 5.10.* unaffected
… +4 more rows
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I. Basic Information for CVE-2023-53049

Vulnerability Information
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Vulnerability Title
usb: ucsi: Fix NULL pointer deref in ucsi_connector_change()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: usb: ucsi: Fix NULL pointer deref in ucsi_connector_change() When ucsi_init() fails, ucsi->connector is NULL, yet in case of ucsi_acpi we may still get events which cause the ucs_acpi code to call ucsi_connector_change(), which then derefs the NULL ucsi->connector pointer. Fix this by not setting ucsi->ntfy inside ucsi_init() until ucsi_init() has succeeded, so that ucsi_connector_change() ignores the events because UCSI_ENABLE_NTFY_CONNECTOR_CHANGE is not set in the ntfy mask.
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ucsi_connector_change函数未检查ucsi初始化状态，可能导致空指针取消引用。
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 bdc62f2bae8fb0e8e99574de5232f0a3c54a27df ~ a6adfe9bbd6ac11e398b54ccd99a0f8eea09f3c0 -
Linux Linux 5.5 -

II. Public POCs for CVE-2023-53049

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III. Intelligence Information for CVE-2023-53049

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Patches & Fixes for CVE-2023-53049 (5)

Same Patch Batch · Linux · 2025-05-02 · 107 CVEs total

CVE-2023-53116 9.8 CRITICAL nvmet: avoid potential UAF in nvmet_req_complete()
CVE-2023-53083 9.8 CRITICAL nfsd: don't replace page in rq_pages if it's a continuation of last page
CVE-2023-53086 8.8 HIGH wifi: mt76: connac: do not check WED status for non-mmio devices
CVE-2025-37798 7.8 HIGH codel: remove sch->q.qlen check before qdisc_tree_reduce_backlog()
CVE-2023-53138 7.8 HIGH net: caif: Fix use-after-free in cfusbl_device_notify()
CVE-2023-53111 7.8 HIGH loop: Fix use-after-free issues
CVE-2023-53107 7.8 HIGH veth: Fix use after free in XDP_REDIRECT
CVE-2023-53102 7.8 HIGH ice: xsk: disable txq irq before flushing hw
CVE-2023-53100 7.8 HIGH ext4: fix WARNING in ext4_update_inline_data
CVE-2023-53094 7.8 HIGH tty: serial: fsl_lpuart: fix race on RX DMA shutdown
CVE-2023-53090 7.8 HIGH drm/amdkfd: Fix an illegal memory access
CVE-2023-53088 7.8 HIGH mptcp: fix UaF in listener shutdown
CVE-2023-53087 7.8 HIGH drm/i915/active: Fix misuse of non-idle barriers as fence trackers
CVE-2023-53084 7.8 HIGH drm/shmem-helper: Remove another errant put in error path
CVE-2023-53080 7.8 HIGH xsk: Add missing overflow check in xdp_umem_reg
CVE-2023-53072 7.8 HIGH mptcp: use the workqueue to destroy unaccepted sockets
CVE-2023-53065 7.8 HIGH perf/core: Fix perf_output_begin parameter is incorrectly invoked in perf_event_bpf_output
CVE-2023-53057 7.8 HIGH Bluetooth: HCI: Fix global-out-of-bounds
CVE-2023-53052 7.8 HIGH cifs: fix use-after-free bug in refresh_cache_worker()
CVE-2023-53043 7.8 HIGH arm64: dts: qcom: sc7280: Mark PCIe controller as cache coherent

Showing top 20 of 107 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-53049

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