What’s Vulnerable › Vulnerabilities

CVE-2022-49048: ipv6: fix panic when forwarding a pkt with no in6 dev

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-02-26 · updated 2026-10-15

Description

In the Linux kernel, the following vulnerability has been resolved: ipv6: fix panic when forwarding a pkt with no in6 dev kongweibin reported a kernel panic in ip6_forward() when input interface has no in6 dev associated. The following tc commands were used to reproduce this panic: tc qdisc del dev vxlan100 root tc qdisc add dev vxlan100 root netem corrupt 5%

Affected products

• Linux kernel: from 4.19.199 before 4.19.239; from 5.4.136 before 5.4.190; from 5.10.54 before 5.10.112; from 5.13.6 before 5.14; from 5.14.1 before 5.15.35; from 5.16 before 5.17.4 — fixed in 4.19.239, 5.10.112, 5.14, 5.15.35, 5.17.4, 5.4.190

How to fix

Upgrade to a fixed version: Linux kernel 4.19.239, 5.10.112, 5.14, 5.15.35. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/74b68f5249f16c5f7f675d0f604fa6ae20e3a151
• https://git.kernel.org/stable/c/a263712ba8c9ded25dd9d2d5ced11bcea5b33a3e
• https://git.kernel.org/stable/c/ab2f5afb7af5c68389e8c7dd29e0a98fbeaaa435
• https://git.kernel.org/stable/c/adee01bbf6cb5b3e4ed08be8ff866aac90f13836
• https://git.kernel.org/stable/c/e3fa461d8b0e185b7da8a101fe94dfe6dd500ac0
• https://git.kernel.org/stable/c/e69fb3de87a8923e5931a272a38fa3cceb01da44

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