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Vulnerability · Published Sep 15, 2025 · Assigned by Linux

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

High 7.8

In plain English

A high-severity use-after-free in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.2%top 94.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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().

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.37-1DEBIAN-CVE-2023-53219
Debian:13linux6.3.7-1DEBIAN-CVE-2023-53219
Debian:14linux6.3.7-1DEBIAN-CVE-2023-53219
Ubuntu:22.04:LTSlinux5.15.0-83.92UBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-aws5.15.0-1044.49UBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-azure5.15.0-1046.53UBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2023-53219
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1046.53.1UBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-gcp5.15.0-1041.49UBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2023-53219
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-gke5.15.0-1041.46UBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1027.32UBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2023-53219
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-ibm5.15.0-1037.40UBUNTU-CVE-2023-53219
Ubuntu:24.04:LTSlinux-intelno fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1039.45UBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-kvm5.15.0-1041.46UBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-83.92UBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2023-53219
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1032.32UBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1017.17UBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1004.4UBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2023-53219
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2023-53219
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-oracle5.15.0-1042.48UBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-raspi5.15.0-1037.40UBUNTU-CVE-2023-53219
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-53219
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-53219
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2023-53219
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1025.29UBUNTU-CVE-2023-53219

Affected products (as reported)

VendorProductVersions
Linux Linux 52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e – before dd5c77814f290b353917df329f36de1472d4715452b1eaf4c59a3bbd07afbb4ab4f43418a807d02e – before 90229e9ee957d4514425e4a4d82c50ab5d57ac4d52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e – before 1550bcf2983ae1220cc8ab899a39a423fa7cb52352b1eaf4c59a3bbd07afbb4ab4f43418a807d02e – before f9982db735a8495eee14267cf193c806b957e94252b1eaf4c59a3bbd07afbb4ab4f43418a807d02e – before 051af3f0b7d1cd8ab7f3e2523ad8ae1af44caba352b1eaf4c59a3bbd07afbb4ab4f43418a807d02e – before 07821524f67bf920342bc84ae8b3dea2a315a89e52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e – before c8f9c05e1ebcc9c7bc211cc8b74d8fb86a8756fc52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e – before 0f5bb36bf9b39a2a96e730bf4455095b50713f63
Linux Linux 4.3

Weakness: CWE-416 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References