CVE-2023-53219

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e < dd5c77814f290b353917df329f36de1472d47154affected
LinuxLinux52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e < 90229e9ee957d4514425e4a4d82c50ab5d57ac4daffected
LinuxLinux52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e < 1550bcf2983ae1220cc8ab899a39a423fa7cb523affected
LinuxLinux52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e < f9982db735a8495eee14267cf193c806b957e942affected
LinuxLinux52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e < 051af3f0b7d1cd8ab7f3e2523ad8ae1af44caba3affected
LinuxLinux52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e < 07821524f67bf920342bc84ae8b3dea2a315a89eaffected
LinuxLinux52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e < c8f9c05e1ebcc9c7bc211cc8b74d8fb86a8756fcaffected
LinuxLinux52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e < 0f5bb36bf9b39a2a96e730bf4455095b50713f63affected
LinuxLinux4.3affected
LinuxLinux0 < 4.3unaffected
LinuxLinux4.14.316 <= 4.14.*unaffected
LinuxLinux4.19.284 <= 4.19.*unaffected
LinuxLinux5.4.244 <= 5.4.*unaffected
LinuxLinux5.10.181 <= 5.10.*unaffected
LinuxLinux5.15.113 <= 5.15.*unaffected
LinuxLinux6.1.30 <= 6.1.*unaffected
LinuxLinux6.3.4 <= 6.3.*unaffected
LinuxLinux6.4 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

References