UBUNTU-CVE-2026-42772

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2026-42772
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42772.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-42772
Upstream
Downstream
Related
Published
2026-09-29T16:17:00Z
Modified
2026-10-02T12:17:38Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
  • Ubuntu - low
Summary
[none]
Details

Issue summary: The QUIC stream reassembly algorithm performance deteriorates progressively as packets are arriving out of order. The worst case has a quadratic complexity proportional to the number of stream frames kept in the buffer for the received stream data. Impact summary: A remote QUIC peer that completes the handshake can create a connection-scoped CPU pressure and potentially a Denial of Service using compliant STREAM frames inside the advertised receive window, with low attacker bandwidth. CWE: CWE-407: Inefficient Algorithmic Complexity Description: OpenSSL manages received QUIC stream fragments using a doubly-linked list. While it optimizes for append operations (at the end of the list), it falls back to a head-to-tail linear search for any fragment that does not immediately follow the current tail. By manipulating the sequence of offsets, an attacker can force the server to perform O(n^2) operations, consuming excessive CPU time for the QUIC process. FIPS impact: no The FIPS module is not affected as the QUIC implementation is outside of the OpenSSL FIPS module boundary.

References

Affected packages

Ubuntu:Pro:22.04:LTS / nodejs

Package

Name
nodejs
Purl
pkg:deb/ubuntu/nodejs?arch=source&distro=esm-apps%2Fjammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

12.*
12.22.5~dfsg-5ubuntu1
12.22.7~dfsg-2ubuntu1
12.22.7~dfsg-2ubuntu3
12.22.9~dfsg-1ubuntu2
12.22.9~dfsg-1ubuntu3
12.22.9~dfsg-1ubuntu3.1
12.22.9~dfsg-1ubuntu3.2
12.22.9~dfsg-1ubuntu3.3
12.22.9~dfsg-1ubuntu3.4
12.22.9~dfsg-1ubuntu3.5
12.22.9~dfsg-1ubuntu3.6
12.22.9~dfsg-1ubuntu3.6+esm2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libnode72",
            "binary_version":  "12.22.9~dfsg-1ubuntu3.6+esm2"
        },
        {
            "binary_name":  "nodejs",
            "binary_version":  "12.22.9~dfsg-1ubuntu3.6+esm2"
        }
    ],
    "priority_reason":  "OpenSSL developers have rated this issue as being low severity"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42772.json"

Ubuntu:26.04:LTS / edk2

Package

Name
edk2
Purl
pkg:deb/ubuntu/edk2?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2025.*
2025.02-8ubuntu3
2025.11-3ubuntu6
2025.11-3ubuntu7
2025.11-3ubuntu7.2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "efi-shell-aa64",
            "binary_version":  "2025.11-3ubuntu7.2"
        },
        {
            "binary_name":  "efi-shell-loongarch64",
            "binary_version":  "2025.11-3ubuntu7.2"
        },
        {
            "binary_name":  "efi-shell-riscv64",
            "binary_version":  "2025.11-3ubuntu7.2"
        },
        {
            "binary_name":  "efi-shell-x64",
            "binary_version":  "2025.11-3ubuntu7.2"
        },
        {
            "binary_name":  "ovmf",
            "binary_version":  "2025.11-3ubuntu7.2"
        },
        {
            "binary_name":  "ovmf-amdsev",
            "binary_version":  "2025.11-3ubuntu7.2"
        },
        {
            "binary_name":  "ovmf-generic",
            "binary_version":  "2025.11-3ubuntu7.2"
        },
        {
            "binary_name":  "ovmf-inteltdx",
            "binary_version":  "2025.11-3ubuntu7.2"
        },
        {
            "binary_name":  "ovmf-legacy",
            "binary_version":  "2025.11-3ubuntu7.2"
        },
        {
            "binary_name":  "qemu-efi-aarch64",
            "binary_version":  "2025.11-3ubuntu7.2"
        },
        {
            "binary_name":  "qemu-efi-loongarch64",
            "binary_version":  "2025.11-3ubuntu7.2"
        },
        {
            "binary_name":  "qemu-efi-riscv64",
            "binary_version":  "2025.11-3ubuntu7.2"
        }
    ],
    "priority_reason":  "OpenSSL developers have rated this issue as being low severity"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42772.json"

Ubuntu:26.04:LTS / edk2-hwe

Package

Name
edk2-hwe
Purl
pkg:deb/ubuntu/edk2-hwe?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2025.*
2025.11-3ubuntu6
2025.11-3ubuntu8
2025.11-3ubuntu8.2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "efi-shell-aa64-hwe",
            "binary_version":  "2025.11-3ubuntu8.2"
        },
        {
            "binary_name":  "efi-shell-loongarch64-hwe",
            "binary_version":  "2025.11-3ubuntu8.2"
        },
        {
            "binary_name":  "efi-shell-riscv64-hwe",
            "binary_version":  "2025.11-3ubuntu8.2"
        },
        {
            "binary_name":  "efi-shell-x64-hwe",
            "binary_version":  "2025.11-3ubuntu8.2"
        },
        {
            "binary_name":  "ovmf-amdsev-hwe",
            "binary_version":  "2025.11-3ubuntu8.2"
        },
        {
            "binary_name":  "ovmf-generic-hwe",
            "binary_version":  "2025.11-3ubuntu8.2"
        },
        {
            "binary_name":  "ovmf-hwe",
            "binary_version":  "2025.11-3ubuntu8.2"
        },
        {
            "binary_name":  "ovmf-inteltdx-hwe",
            "binary_version":  "2025.11-3ubuntu8.2"
        },
        {
            "binary_name":  "ovmf-legacy-hwe",
            "binary_version":  "2025.11-3ubuntu8.2"
        },
        {
            "binary_name":  "qemu-efi-aarch64-hwe",
            "binary_version":  "2025.11-3ubuntu8.2"
        },
        {
            "binary_name":  "qemu-efi-loongarch64-hwe",
            "binary_version":  "2025.11-3ubuntu8.2"
        },
        {
            "binary_name":  "qemu-efi-riscv64-hwe",
            "binary_version":  "2025.11-3ubuntu8.2"
        }
    ],
    "priority_reason":  "OpenSSL developers have rated this issue as being low severity"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42772.json"

Ubuntu:26.04:LTS / openssl

Package

Name
openssl
Purl
pkg:deb/ubuntu/openssl?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.5.5-1ubuntu3.7

Affected versions

3.*
3.5.3-1ubuntu2
3.5.5-1ubuntu1
3.5.5-1ubuntu3
3.5.5-1ubuntu3.2
3.5.5-1ubuntu3.3
3.5.5-1ubuntu3.4
3.5.5-1ubuntu3.5
3.5.5-1ubuntu3.6

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "libssl3t64",
            "binary_version":  "3.5.5-1ubuntu3.7"
        },
        {
            "binary_name":  "openssl",
            "binary_version":  "3.5.5-1ubuntu3.7"
        },
        {
            "binary_name":  "openssl-provider-legacy",
            "binary_version":  "3.5.5-1ubuntu3.7"
        }
    ],
    "priority_reason":  "OpenSSL developers have rated this issue as being low severity"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42772.json"