7.1

CVE-2025-38004

can: bcm: add locking for bcm_op runtime updates

In the Linux kernel, the following vulnerability has been resolved:

can: bcm: add locking for bcm_op runtime updates

The CAN broadcast manager (CAN BCM) can send a sequence of CAN frames via
hrtimer. The content and also the length of the sequence can be changed
resp reduced at runtime where the 'currframe' counter is then set to zero.

Although this appeared to be a safe operation the updates of 'currframe'
can be triggered from user space and hrtimer context in bcm_can_tx().
Anderson Nascimento created a proof of concept that triggered a KASAN
slab-out-of-bounds read access which can be prevented with a spin_lock_bh.

At the rework of bcm_can_tx() the 'count' variable has been moved into
the protected section as this variable can be modified from both contexts
too.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 2.6.25 < 5.4.294
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.238
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.185
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.141
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.93
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.31
Linux ≫ Linux Kernel Version >= 6.13 < 6.14.9
Linux ≫ Linux Kernel Version6.15 Updaterc1
Linux ≫ Linux Kernel Version6.15 Updaterc2
Linux ≫ Linux Kernel Version6.15 Updaterc3
Linux ≫ Linux Kernel Version6.15 Updaterc4
Linux ≫ Linux Kernel Version6.15 Updaterc5
Linux ≫ Linux Kernel Version6.15 Updaterc6
Linux ≫ Linux Kernel Version6.15 Updaterc7
Debian ≫ Debian Linux Version11.0
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.21% 0.106
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.1 1.8 5.2
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE-125 Out-of-bounds Read

The product reads data past the end, or before the beginning, of the intended buffer.

https://git.kernel.org/stable/c/8f1c022541bf5a923c8d6fa483112c15250f30a4
Patch
https://git.kernel.org/stable/c/7595de7bc56e0e52b74e56c90f7e247bf626d628
Patch
https://git.kernel.org/stable/c/fbd8fdc2b218e979cfe422b139b8f74c12419d1f
Patch
https://git.kernel.org/stable/c/2a437b86ac5a9893c902f30ef66815bf13587bf6
Patch
https://git.kernel.org/stable/c/76c84c3728178b2d38d5604e399dfe8b0752645e
Patch
https://git.kernel.org/stable/c/cc55dd28c20a6611e30596019b3b2f636819a4c0
Patch
https://git.kernel.org/stable/c/c4e8a172501e677ebd8ea9d9161d97dc4df56fbd
Patch
https://git.kernel.org/stable/c/c2aba69d0c36a496ab4f2e81e9c2b271f2693fd7
Patch
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
Third Party Advisory
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
Third Party Advisory