Vulnerability in Linux
CVE-2025-39770
In the Linux kernel, the following vulnerability has been resolved: net: gso: Forbid IPv6 TSO with extensions on devices with only IPV6_CSUM When performing Generic Segmentation Offload (GSO) on an IPv6 packet that contains extension hea…
EPSS: 0.001 (4.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Linux — versions 6.6.103, 705350fbd6ed4b5d89ee045fa57a0594a72b17d7, a27a5c40ee4cbe00294e2c76160de5f2589061ba
- Linux Linux_kernel — versions 6.12, 6.17
- Debian Debian_linux — versions 11.0
Public proof-of-concept exploits
References
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
- af854a3a-2127-422b-91ae-364da2661108 (Third Party Advisory)
- 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
- 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
Frequently asked questions
- What is CVE-2025-39770?
- CVE-2025-39770 is a medium-severity vulnerability in Linux. CVSS score: 5.5/10. Published 2025-09-11.
- How severe is CVE-2025-39770?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2025-39770 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.