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CVE-2023-53219— media: netup_unidvb: fix use-after-free at del_timer()

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，该漏洞源于未正确停止dma->timeout定时器，可能导致释放后重用。

CVSS 7.8 · High EPSS 0.16% · P5

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e< dd5c77814f290b353917df329f36de1472d47154 affected
52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e< 90229e9ee957d4514425e4a4d82c50ab5d57ac4d affected
52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e< 1550bcf2983ae1220cc8ab899a39a423fa7cb523 affected
52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e< f9982db735a8495eee14267cf193c806b957e942 affected
52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e< 051af3f0b7d1cd8ab7f3e2523ad8ae1af44caba3 affected
52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e< 07821524f67bf920342bc84ae8b3dea2a315a89e affected
52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e< c8f9c05e1ebcc9c7bc211cc8b74d8fb86a8756fc affected
52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e< 0f5bb36bf9b39a2a96e730bf4455095b50713f63 affected
… +10 more rows
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I. Basic Information for CVE-2023-53219

Vulnerability Information
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Vulnerability Title
media: netup_unidvb: fix use-after-free at del_timer()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: media: netup_unidvb: fix use-after-free at del_timer() When Universal DVB card is detaching, netup_unidvb_dma_fini() uses del_timer() to stop dma->timeout timer. But when timer handler netup_unidvb_dma_timeout() is running, del_timer() could not stop it. As a result, the use-after-free bug could happen. The process is shown below: (cleanup routine) | (timer routine) | mod_timer(&dev->tx_sim_timer, ..) netup_unidvb_finidev() | (wait a time) netup_unidvb_dma_fini() | netup_unidvb_dma_timeout() del_timer(&dma->timeout); | | ndev->pci_dev->dev //USE Fix by changing del_timer() to del_timer_sync().
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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，该漏洞源于未正确停止dma->timeout定时器，可能导致释放后重用。
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 52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e ~ dd5c77814f290b353917df329f36de1472d47154 -
Linux Linux 4.3 -

II. Public POCs for CVE-2023-53219

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III. Intelligence Information for CVE-2023-53219

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Same Patch Batch · Linux · 2025-09-15 · 210 CVEs total

CVE-2023-53192 9.8 CRITICAL vxlan: Fix nexthop hash size
CVE-2022-50235 9.8 CRITICAL NFSD: Protect against send buffer overflow in NFSv2 READDIR
CVE-2022-50335 9.8 CRITICAL 9p: set req refcount to zero to avoid uninitialized usage
CVE-2023-53226 8.8 HIGH wifi: mwifiex: Fix OOB and integer underflow when rx packets
CVE-2023-53253 8.8 HIGH HID: nvidia-shield: Reference hid_device devm allocation of input_dev name
CVE-2022-50241 8.8 HIGH NFSD: fix use-after-free on source server when doing inter-server copy
CVE-2023-53194 8.4 HIGH fs/ntfs3: Add length check in indx_get_root
CVE-2023-53213 8.1 HIGH wifi: brcmfmac: slab-out-of-bounds read in brcmf_get_assoc_ies()
CVE-2023-53186 8.1 HIGH skbuff: Fix a race between coalescing and releasing SKBs
CVE-2023-53179 7.8 HIGH netfilter: ipset: add the missing IP_SET_HASH_WITH_NET0 macro for ip_set_hash_netportnet.c
CVE-2022-50259 7.8 HIGH bpf, sockmap: fix race in sock_map_free()
CVE-2022-50274 7.8 HIGH media: dvbdev: adopts refcnt to avoid UAF
CVE-2023-53189 7.8 HIGH ipv6/addrconf: fix a potential refcount underflow for idev
CVE-2023-53187 7.8 HIGH btrfs: fix use-after-free of new block group that became unused
CVE-2025-39800 7.8 HIGH btrfs: abort transaction on unexpected eb generation at btrfs_copy_root()
CVE-2023-53170 7.8 HIGH net: dsa: Removed unneeded of_node_put in felix_parse_ports_node
CVE-2023-53254 7.8 HIGH cacheinfo: Fix shared_cpu_map to handle shared caches at different levels
CVE-2023-53252 7.8 HIGH Bluetooth: use RCU for hci_conn_params and iterate safely in hci_sync
CVE-2023-53176 7.8 HIGH serial: 8250: Reinit port->pm on port specific driver unbind
CVE-2022-50286 7.8 HIGH ext4: fix delayed allocation bug in ext4_clu_mapped for bigalloc + inline

Showing top 20 of 210 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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