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CVE-2025-38004— can: bcm: add locking for bcm_op runtime updates

EPSS 0.09% · P25

Affected Version Matrix 18

VendorProductVersion RangeStatus
LinuxLinuxffd980f976e7fd666c2e61bf8ab35107efd11828< 8f1c022541bf5a923c8d6fa483112c15250f30a4affected
ffd980f976e7fd666c2e61bf8ab35107efd11828< 7595de7bc56e0e52b74e56c90f7e247bf626d628affected
ffd980f976e7fd666c2e61bf8ab35107efd11828< fbd8fdc2b218e979cfe422b139b8f74c12419d1faffected
ffd980f976e7fd666c2e61bf8ab35107efd11828< 2a437b86ac5a9893c902f30ef66815bf13587bf6affected
ffd980f976e7fd666c2e61bf8ab35107efd11828< 76c84c3728178b2d38d5604e399dfe8b0752645eaffected
ffd980f976e7fd666c2e61bf8ab35107efd11828< cc55dd28c20a6611e30596019b3b2f636819a4c0affected
ffd980f976e7fd666c2e61bf8ab35107efd11828< c4e8a172501e677ebd8ea9d9161d97dc4df56fbdaffected
ffd980f976e7fd666c2e61bf8ab35107efd11828< c2aba69d0c36a496ab4f2e81e9c2b271f2693fd7affected
… +10 more rows
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I. Basic Information for CVE-2025-38004

Vulnerability Information
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Vulnerability Title
can: bcm: add locking for bcm_op runtime updates
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于bcm_op运行时更新缺少锁定，可能导致越界读取。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux ffd980f976e7fd666c2e61bf8ab35107efd11828 ~ 8f1c022541bf5a923c8d6fa483112c15250f30a4 -
LinuxLinux 2.6.25 -

II. Public POCs for CVE-2025-38004

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III. Intelligence Information for CVE-2025-38004

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IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-38004

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