CVE-2025-40255
- Source
- https://cve.org/CVERecord?id=CVE-2025-40255
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-40255.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2025-40255
- Downstream
- Published
- 2025-12-04T16:08:17.023Z
- Modified
- 2026-03-10T21:52:57.593304Z
- Summary
- net: core: prevent NULL deref in generic_hwtstamp_ioctl_lower()
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
net: core: prevent NULL deref in generichwtstampioctl_lower()
The ethtool tsconfig Netlink path can trigger a null pointer dereference. A call chain such as:
tsconfigpreparedata() -> devgethwtstampphylib() -> vlanhwtstampget() -> generichwtstampgetlower() -> generichwtstampioctl_lower()
results in generichwtstampioctllower() being called with kernelcfg->ifr as NULL.
The generichwtstampioctl_lower() function does not expect a NULL ifr and dereferences it, leading to a system crash.
Fix this by adding a NULL check for kernelcfg->ifr in generichwtstampioctllower(). If ifr is NULL, return -EINVAL.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40255.json" }- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/8817f816ae41908e9625c0770c4af0dcdcc01238
- https://git.kernel.org/stable/c/f796a8dec9beafcc0f6f0d3478ed685a15c5e062
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40255.json
- https://nvd.nist.gov/vuln/detail/CVE-2025-40255
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6e9e2eed4f39d52edf5fd006409d211facf49f6bFixed8817f816ae41908e9625c0770c4af0dcdcc01238Fixedf796a8dec9beafcc0f6f0d3478ed685a15c5e062
Affected versions
v6.*
v6.13
v6.13-rc3
v6.13-rc4
v6.13-rc5
v6.13-rc6
v6.13-rc7
v6.14
v6.14-rc1
v6.14-rc2
v6.14-rc3
v6.14-rc4
v6.14-rc5
v6.14-rc6
v6.14-rc7
v6.15
v6.15-rc1
v6.15-rc2
v6.15-rc3
v6.15-rc4
v6.15-rc5
v6.15-rc6
v6.15-rc7
v6.16
v6.16-rc1
v6.16-rc2
v6.16-rc3
v6.16-rc4
v6.16-rc5
v6.16-rc6
v6.16-rc7
v6.17
v6.17-rc1
v6.17-rc2
v6.17-rc3
v6.17-rc4
v6.17-rc5
v6.17-rc6
v6.17-rc7
v6.17.1
v6.17.2
v6.17.3
v6.17.4
v6.17.5
v6.17.6
v6.17.7
v6.17.8
v6.17.9
v6.18-rc1
v6.18-rc2
v6.18-rc3
v6.18-rc4
v6.18-rc5