7.8

CVE-2024-27043

media: edia: dvbdev: fix a use-after-free

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 2.6.21 < 4.19.311
Linux ≫ Linux Kernel Version >= 4.20 < 5.4.273
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.214
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.153
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.83
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.23
Linux ≫ Linux Kernel Version >= 6.7 < 6.7.11
Linux ≫ Linux Kernel Version >= 6.8 < 6.8.2
VulnDex Vulnerability Enrichment
Diese Information steht angemeldeten Benutzern zur Verfügung. Login Login
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.29% 0.206
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
Patch
https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
Patch
https://git.kernel.org/stable/c/096237039d00c839f3e3a5fe6d001bf0db45b644
Patch
https://git.kernel.org/stable/c/0d3fe80b6d175c220b3e252efc6c6777e700e98e
Patch
https://git.kernel.org/stable/c/35674111a043b0482a9bc69da8850a83f465b07d
Patch
https://git.kernel.org/stable/c/437a111f79a2f5b2a5f21e27fdec6f40c8768712
Patch
https://git.kernel.org/stable/c/779e8db7efb22316c8581d6c229636d2f5694a62
Patch
https://git.kernel.org/stable/c/8c64f4cdf4e6cc5682c52523713af8c39c94e6d5
Patch
https://git.kernel.org/stable/c/b7586e902128e4fb7bfbb661cb52e4215a65637b
Patch
https://git.kernel.org/stable/c/d0f5c28333822f9baa5280d813124920720fd856
Patch
https://git.kernel.org/stable/c/f20c3270f3ed5aa6919a87e4de9bf6c05fb57086
Patch