Nixpkgs security tracker
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CVE-2026-62309
7.5 HIGH
- CVSS version (CVSS): 3.1
- Attack Vector (AV): Network (N)
- Attack Complexity (AC): Low (L)
- Privileges Required (PR): None (N)
- User Interaction (UI): None (N)
- Scope (S): Unchanged (U)
- Confidentiality (C): None (N)
- Integrity (I): None (N)
- Availability (A): High (H)
- Modified Attack Vector (MAV): Network (N)
- Modified Attack Complexity (MAC): Low (L)
- Modified Privileges Required (MPR): None (N)
- Modified User Interaction (MUI): None (N)
- Modified Confidentiality (MC): None (N)
- Modified Scope (MS): Unchanged (U)
- Modified Integrity (MI): None (N)
- Modified Availability (MA): High (H)
Activity log
- Created suggestion
CoreDNS: proxyproto plugin panics on PPv2 datagram with non-UDP transport — single 28-byte packet remote DoS
CoreDNS is a DNS server written in Go. Prior to 1.14.4, a single 28-byte UDP datagram can crash the CoreDNS process when the proxyproto plugin is enabled because plugin/pkg/proxyproto/proxyproto.go PacketConn.ReadFrom handles a PROXY v2 header with non-UDP transport such as family byte 0x11, reassigns addr from a nil readFrom result after parseProxyProtocol errors, and calls addr.String() in the warning log before ServeDNS recovery applies. This issue is fixed in version 1.14.4.
References
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https://github.com/coredns/coredns/security/advisories/GHSA-9rvv-m5g5-wc8r x_refsource_CONFIRM
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https://github.com/coredns/coredns/pull/8154 x_refsource_MISC
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https://github.com/coredns/coredns/releases/tag/v1.14.4 x_refsource_MISC
Affected products
coredns
- ==< 1.14.4
Package maintainers
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@rtreffer Rene Treffer <treffer+nixos@measite.de>
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@rushmorem Rushmore Mushambi <rushmore@webenchanter.com>
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@DeltaEvo Duarte David <deltaduartedavid@gmail.com>
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@johanot Johan Thomsen <write@ownrisk.dk>
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@djds djds <git@djds.dev>