The ipv6_hop_jumbo function in net/ipv6/exthdrs.c in the Linux kernel before 2.6.22 does not properly validate the hop-by-hop IPv6 extended header, which allows remote attackers to cause a denial of service (NULL pointer dereference and kernel panic) via a crafted IPv6 packet.
Conclusion & alert: CVE-2007-4567 is rated High Exploit Risk (84.9/100): CVSS High severity, with high exploitation likelihood (EPSS 14.34%, 96th percentile). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +7.12% over the last day, indicating growing attacker interest. Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| 30902 | exploit_db | edb | 2007-12-19 | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 7.22% | 14.34% | +7.12% |
| 2 | 2026-06-08 | 5.05% | 7.22% | +2.16% |
| 3 | 2025-05-15 | — | 5.05% | — |
Full EPSS history (17 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.8 | 2.0 | HIGH |
|
10.0 | 6.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2007-4567 |
ubuntu
|
medium | CVE-2007-4567 medium priority: Ubuntu including 4 source packages (linux-source-2.6.15, linux-source-2.6.17, linux-source-2.6.20, linux-source-2.6.22), 8 status rows across 5 suites (dapper, edgy, feisty, gutsy, upstream): needs-triage 3, not-affected 3, released 2. | https://ubuntu.com/security/CVE-2007-4567 |
This issue did not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 3, 4 and Red Hat Enterprise MRG. Shipped kernels do not include upstream commit a11d206d that introduced the problem. This upstream commit was backported in Red Hat Enterprise Linux 5 via RHBA-2008:0314. It was reported and addressed in Red Hat Enterprise Linux 5 via https://rhn.redhat.com/errata/RHSA-2010-0019.html
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| linux | linux_kernel | <= 2.6.21.7 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | 2.2.27 | cpe:2.3:o:linux:linux_kernel:2.2.27:*:*:*:*:*:*:* |
| linux | linux_kernel | 2.4.36 | cpe:2.3:o:linux:linux_kernel:2.4.36:*:*:*:*:*:*:* |
| linux | linux_kernel | 2.4.36.1 | cpe:2.3:o:linux:linux_kernel:2.4.36.1:*:*:*:*:*:*:* |
| linux | linux_kernel | 2.4.36.2 | cpe:2.3:o:linux:linux_kernel:2.4.36.2:*:*:*:*:*:*:* |
| linux | linux_kernel | 2.4.36.3 | cpe:2.3:o:linux:linux_kernel:2.4.36.3:*:*:*:*:*:*:* |
| linux | linux_kernel | 2.4.36.4 | cpe:2.3:o:linux:linux_kernel:2.4.36.4:*:*:*:*:*:*:* |
| linux | linux_kernel | 2.4.36.5 | cpe:2.3:o:linux:linux_kernel:2.4.36.5:*:*:*:*:*:*:* |
| linux | linux_kernel | 2.4.36.6 | cpe:2.3:o:linux:linux_kernel:2.4.36.6:*:*:*:*:*:*:* |
| linux | linux_kernel | 2.6 | cpe:2.3:o:linux:linux_kernel:2.6:*:*:*:*:*:*:* |
| linux | linux_kernel | 2.6.18 | cpe:2.3:o:linux:linux_kernel:2.6.18:*:*:*:*:*:*:* |
| linux | linux_kernel | 2.6.18 | cpe:2.3:o:linux:linux_kernel:2.6.18:rc1:*:*:*:*:*:* |
| linux | linux_kernel | 2.6.18 | cpe:2.3:o:linux:linux_kernel:2.6.18:rc2:*:*:*:*:*:* |
| linux | linux_kernel | 2.6.18 | cpe:2.3:o:linux:linux_kernel:2.6.18:rc3:*:*:*:*:*:* |
| linux | linux_kernel | 2.6.18 | cpe:2.3:o:linux:linux_kernel:2.6.18:rc4:*:*:*:*:*:* |
| linux | linux_kernel | 2.6.18 | cpe:2.3:o:linux:linux_kernel:2.6.18:rc5:*:*:*:*:*:* |
| linux | linux_kernel | 2.6.18 | cpe:2.3:o:linux:linux_kernel:2.6.18:rc6:*:*:*:*:*:* |
| linux | linux_kernel | 2.6.18 | cpe:2.3:o:linux:linux_kernel:2.6.18:rc7:*:*:*:*:*:* |
| linux | linux_kernel | 2.6.19.4 | cpe:2.3:o:linux:linux_kernel:2.6.19.4:*:*:*:*:*:*:* |
| linux | linux_kernel | 2.6.19.5 | cpe:2.3:o:linux:linux_kernel:2.6.19.5:*:*:*:*:*:*:* |
| linux | linux_kernel | 2.6.19.6 | cpe:2.3:o:linux:linux_kernel:2.6.19.6:*:*:*:*:*:*:* |
| linux | linux_kernel | 2.6.19.7 | cpe:2.3:o:linux:linux_kernel:2.6.19.7:*:*:*:*:*:*:* |
| linux | linux_kernel | 2.6.20.16 | cpe:2.3:o:linux:linux_kernel:2.6.20.16:*:*:*:*:*:*:* |
| linux | linux_kernel | 2.6.20.17 | cpe:2.3:o:linux:linux_kernel:2.6.20.17:*:*:*:*:*:*:* |
| linux | linux_kernel | 2.6.20.18 | cpe:2.3:o:linux:linux_kernel:2.6.20.18:*:*:*:*:*:*:* |
| linux | linux_kernel | 2.6.20.19 | cpe:2.3:o:linux:linux_kernel:2.6.20.19:*:*:*:*:*:*:* |
| linux | linux_kernel | 2.6.20.20 | cpe:2.3:o:linux:linux_kernel:2.6.20.20:*:*:*:*:*:*:* |
| linux | linux_kernel | 2.6.20.21 | cpe:2.3:o:linux:linux_kernel:2.6.20.21:*:*:*:*:*:*:* |
| linux | linux_kernel | 2.6.21.5 | cpe:2.3:o:linux:linux_kernel:2.6.21.5:*:*:*:*:*:*:* |
| linux | linux_kernel | 2.6.21.6 | cpe:2.3:o:linux:linux_kernel:2.6.21.6:*:*:*:*:*:*:* |