7.8

CVE-2025-38572: ipv6: reject malicious packets in ipv6_gso_segment()

Modified
AliasesUBUNTU-CVE-2025-38572DEBIAN-CVE-2025-38572
Published 19-08-2025Last modified 05-08-2026

Vulnerability summary

CVE-2025-38572 is a high (CVSS 7.8) vulnerability in debian debian_linux. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 8.9% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.19%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 112 · Related 107
DLA-4327-1DLA-4328-1MGASA-2025-0234MGASA-2025-0235OPENSUSE-SU-2025:20081-1RHSA-2025:18318

Showing 100 of 112.

Timeline

  1. 19-08-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ipv6: reject malicious packets in ipv6_gso_segment() syzbot was able to craft a packet with very long IPv6 extension headers leading to an overflow of skb->transport_header. This 16bit field has a limited range. Add skb_reset_transport_header_careful() helper and use it from ipv6_gso_segment() WARNING: CPU: 0 PID: 5871 at ./include/linux/skbuff.h:3032 skb_reset_transport_header include/linux/skbuff.h:3032 [inline] WARNING: CPU: 0 PID: 5871 at ./include/linux/skbuff.h:3032 ipv6_gso_segment+0x15e2/0x21e0 net/ipv6/ip6_offload.c:151 Modules linked in: CPU: 0 UID: 0 PID: 5871 Comm: syz-executor211 Not tainted 6.16.0-rc6-syzkaller-g7abc678e3084 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:skb_reset_transport_header include/linux/skbuff.h:3032 [inline] RIP: 0010:ipv6_gso_segment+0x15e2/0x21e0 net/ipv6/ip6_offload.c:151 Call Trace: <TASK> skb_mac_gso_segment+0x31c/0x640 net/core/gso.c:53 nsh_gso_segment+0x54a/0xe10 net/nsh/nsh.c:110 skb_mac_gso_segment+0x31c/0x640 net/core/gso.c:53 __skb_gso_segment+0x342/0x510 net/core/gso.c:124 skb_gso_segment include/net/gso.h:83 [inline] validate_xmit_skb+0x857/0x11b0 net/core/dev.c:3950 validate_xmit_skb_list+0x84/0x120 net/core/dev.c:4000 sch_direct_xmit+0xd3/0x4b0 net/sched/sch_generic.c:329 __dev_xmit_skb net/core/dev.c:4102 [inline] __dev_queue_xmit+0x17b6/0x3a70 net/core/dev.c:4679

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.19%

Chance of exploitation in the next 30 days

Percentile

9%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.18% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu147 products
  • linuxAll versions (No fix recorded) | < 5.15.0-163.173 | < 6.8.0-100.100
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1097.104 | < 6.8.0-1046.49
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.1.148-1 | < 6.12.43-1 | < 6.16.3-1
  • debian_linuxEOL11.0
Linux2 products
  • linux≥ d1da932ed4ecad2a14cbcc01ed589d617d0f0f09, < 5dc60b2a00ed7629214ac0c48e43f40af2078703 | ≥ d1da932ed4ecad2a14cbcc01ed589d617d0f0f09, < 3f638e0b28bde7c3354a0df938ab3a96739455d1 | ≥ d1da932ed4ecad2a14cbcc01ed589d617d0f0f09, < 09ff062b89d8e48165247d677d1ca23d6d607e9b | ≥ d1da932ed4ecad2a14cbcc01ed589d617d0f0f09, < de322cdf600fc9433845a9e944d1ca6b31cfb67e | ≥ d1da932ed4ecad2a14cbcc01ed589d617d0f0f09, < ef05007b403dcc21e701cb1f30d4572ac0a9da20 | ≥ d1da932ed4ecad2a14cbcc01ed589d617d0f0f09, < 5489e7fc6f8be3062f8cb7e49406de4bfd94db67 | ≥ d1da932ed4ecad2a14cbcc01ed589d617d0f0f09, < 573b8250fc2554761db3bc2bbdbab23789d52d4e | ≥ d1da932ed4ecad2a14cbcc01ed589d617d0f0f09, < ee851768e4b8371ce151fd446d24bf3ae2d18789 | ≥ d1da932ed4ecad2a14cbcc01ed589d617d0f0f09, < d45cf1e7d7180256e17c9ce88e32e8061a7887fe | 3.8
  • linux_kernel≥ 3.8, < 5.4.297 | ≥ 5.5, < 5.10.241 | ≥ 5.11, < 5.15.190 | ≥ 5.16, < 6.1.148 | ≥ 6.2, < 6.6.102 | ≥ 6.7, < 6.12.42 | ≥ 6.13, < 6.15.10 | ≥ 6.16, < 6.16.1

3 vendors · 151 products

References

47 links
Show all 47 references