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CVE-2024-27043media: edia: dvbdev: fix a use-after-free

Description

In the Linux kernel, the following vulnerability has been resolved: media: edia: dvbdev: fix a use-after-free In dvb_register_device, *pdvbdev is set equal to dvbdev, which is freed in several error-handling paths. However, *pdvbdev is not set to NULL after dvbdev's deallocation, causing use-after-frees in many places, for example, in the following call chain: budget_register |-> dvb_dmxdev_init |-> dvb_register_device |-> dvb_dmxdev_release |-> dvb_unregister_device |-> dvb_remove_device |-> dvb_device_put |-> kref_put When calling dvb_unregister_device, dmxdev->dvbdev (i.e. *pdvbdev in dvb_register_device) could point to memory that had been freed in dvb_register_device. Thereafter, this pointer is transferred to kref_put and triggering a use-after-free.

Timeline

  1. ID reserved

    By Linux

  2. · 2 months later

    Published

  3. · 2 years later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2024-27043, by who scored it
Scored byCVSSScoreVector
LinuxCNA (assigner)3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVDNVD · Modified3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
0.29% · top 78% of all CVEs (15 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.

Affected products

  • Linux · Linux

    • affected b61901024776b25ce7b8edc31bb1757c7382a88e – < d0f5c28333822f9baa5280d813124920720fd856
    • affected b61901024776b25ce7b8edc31bb1757c7382a88e – < f20c3270f3ed5aa6919a87e4de9bf6c05fb57086
    • affected b61901024776b25ce7b8edc31bb1757c7382a88e – < 096237039d00c839f3e3a5fe6d001bf0db45b644
    • affected b61901024776b25ce7b8edc31bb1757c7382a88e – < 0d3fe80b6d175c220b3e252efc6c6777e700e98e
    • affected b61901024776b25ce7b8edc31bb1757c7382a88e – < 437a111f79a2f5b2a5f21e27fdec6f40c8768712
    • affected b61901024776b25ce7b8edc31bb1757c7382a88e – < 779e8db7efb22316c8581d6c229636d2f5694a62
    • affected b61901024776b25ce7b8edc31bb1757c7382a88e – < 35674111a043b0482a9bc69da8850a83f465b07d
    • affected b61901024776b25ce7b8edc31bb1757c7382a88e – < b7586e902128e4fb7bfbb661cb52e4215a65637b
    • affected b61901024776b25ce7b8edc31bb1757c7382a88e – < 8c64f4cdf4e6cc5682c52523713af8c39c94e6d5

  • Linux · Linux

    • affected 2.6.21
    • unaffected < 2.6.21
    • unaffected 4.19.311 – ≤ 4.19.*
    • unaffected 5.4.273 – ≤ 5.4.*
    • unaffected 5.10.214 – ≤ 5.10.*
    • unaffected 5.15.153 – ≤ 5.15.*
    • unaffected 6.1.83 – ≤ 6.1.*
    • unaffected 6.6.23 – ≤ 6.6.*
    • unaffected 6.7.11 – ≤ 6.7.*
    • unaffected 6.8.2 – ≤ 6.8.*
    • unaffected 6.9 – ≤ *

References

References11

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .