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CVE-2026-49237

Local Privilege Escalation in Canonical Multipass

An issue was discovered in Canonical Multipass for macOS before version 1.16.3 due to an incomplete fix for CVE-2025-5199. While the patch in version 1.16.0 updated the ownership of the multipassd daemon binary to root:wheel, five co-located binaries (multipass, qemu-img, qemu-system-aarch64, qemu-system-x86_64, and sshfs_server) in /Library/Application Support/com.canonical.multipass/bin/ retain ownership by the installing user and remain writable. Because the root LaunchDaemon (com.canonical.multipassd.plist) configures a PATH environment variable that prioritizes this user-writable directory and invokes these auxiliary binaries by their bare names, a local attacker can replace an auxiliary binary (such as qemu-img) with a malicious wrapper. When the root daemon subsequently triggers the binary during routine execution (e.g., via multipass launch), the malicious code executes with root privileges, leading to local privilege escalation.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Apple Canonical
Products
Macos Multipass
CVE-2026-49238

SFTP Server VM Escape in Canonical Multipass

An issue was discovered in Canonical Multipass before version 1.16.3. The host-side SFTP server component (sshfs_server), which executes with root privileges on the host, contains a path containment bypass vulnerability within its validate_path function in src/sshfs_mount/sftp_server.cpp. The function performs a plain string prefix comparison on requested paths without path separator validation or dot-dot (..) normalization. A local attacker with root privileges inside a guest virtual machine can bypass the FUSE layer by injecting raw SFTP frames (such as an SSH_FXP_OPEN request) directly into the sshfs_server process stdin/stdout pipes via procfs. By supplying a path containing directory traversal sequences that match the allowed mount prefix, the attacker can force the host-side root process to resolve the traversal and open files outside the designated mount boundary. This allows a guest-side user to read arbitrary files on the host filesystem, resulting in a virtual machine escape.

CVSS 3.1 · 8.4 High EPSS < 1% KEV · Not listed
Vendors
Canonical
Products
Multipass
CVE-2026-47335

NULL pointer dereference in Ubuntu Linux AppArmor notification handling

Ubuntu Linux 6.8 contains SAUCE patches with a possible NULL pointer dereference in the handling of AppArmor notifications. The bug can be triggered by an unprivileged local user. This can lead to a kernel panic.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Canonical
Products
Ubuntu Linux
CVE-2026-47336

Use of uninitialized value in Ubuntu Linux AppArmor IPv4/IPv6 socket mediation rules

Ubuntu Linux 6.8 contains SAUCE patches with a possible use of an uninitialized variable in AppArmor AF_INET/AF_INET6 socket mediation code. The bug can be triggered by an unprivileged local user and could result in incorrect fine-grained mediation of network sockets.

CVSS 3.1 · 3.3 Low EPSS < 1% KEV · Not listed
Vendors
Canonical
Products
Ubuntu Linux
CVE-2026-47337

NULL pointer dereference in Ubuntu Linux AppArmor IPv4/IPv6 socket mediation

Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a possible NULL pointer dereference in the handling of AF_INET/AF_INET6 socket mediation. The bug can be triggered by an unprivileged local user. This can lead to a kernel oops.

CVSS 3.1 · 3.3 Low EPSS < 1% KEV · Not listed
Vendors
Canonical
Products
Ubuntu Linux
CVE-2018-3639

hw: cpu: speculative store bypass

Systems with microprocessors utilizing speculative execution and speculative execution of memory reads before the addresses of all prior memory writes are known may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis, aka Speculative Store Bypass (SSB), Variant 4.

CVSS 3.1 · 5.5 Medium EPSS 60.4% KEV · Not listed
Vendors
Arm Canonical Debian and 9 more
Products
Cortex-a Ubuntu Linux Debian Linux and 327 more
CVE-2018-13785

libpng: Integer overflow and resultant divide-by-zero in pngrutil.c:png_check_chunk_length() allows for denial of service

In libpng 1.6.34, a wrong calculation of row_factor in the png_check_chunk_length function (pngrutil.c) may trigger an integer overflow and resultant divide-by-zero while processing a crafted PNG file, leading to a denial of service.

CVSS 3.1 · 6.5 Medium EPSS 4.4% KEV · Not listed
Vendors
Canonical Libpng Oracle and 1 more
Products
Ubuntu Linux Libpng Jdk and 7 more
CVE-2020-8927

Buffer overflow in Brotli library

A buffer overflow exists in the Brotli library versions prior to 1.0.8 where an attacker controlling the input length of a "one-shot" decompression request to a script can trigger a crash, which happens when copying over chunks of data larger than 2 GiB. It is recommended to update your Brotli library to 1.0.8 or later. If one cannot update, we recommend to use the "streaming" API as opposed to the "one-shot" API, and impose chunk size limits.

CVSS 3.1 · 5.3 Medium EPSS 3.3% KEV · Not listed
Vendors
Canonical Debian Fedoraproject and 4 more
Products
Ubuntu Linux Debian Linux Fedora and 9 more
CVE-2020-29372

kernel: IORING_OP_MADVISE races with coredumping

An issue was discovered in do_madvise in mm/madvise.c in the Linux kernel before 5.6.8. There is a race condition between coredump operations and the IORING_OP_MADVISE implementation, aka CID-bc0c4d1e176e.

CVSS 3.1 · 4.7 Medium EPSS < 1% KEV · Not listed
Vendors
Canonical Linux
Products
Ubuntu Linux Linux Kernel
CVE-2019-18197

libxslt: use after free in xsltCopyText in transform.c could lead to information disclosure

In xsltCopyText in transform.c in libxslt 1.1.33, a pointer variable isn't reset under certain circumstances. If the relevant memory area happened to be freed and reused in a certain way, a bounds check could fail and memory outside a buffer could be written to, or uninitialized data could be disclosed.

CVSS 3.1 · 7.5 High EPSS 4.4% KEV · Not listed
Vendors
Canonical Debian Linux and 2 more
Products
Ubuntu Linux Debian Linux Linux Kernel and 3 more
CVE-2019-17571

log4j: deserialization of untrusted data in SocketServer

Included in Log4j 1.2 is a SocketServer class that is vulnerable to deserialization of untrusted data which can be exploited to remotely execute arbitrary code when combined with a deserialization gadget when listening to untrusted network traffic for log data. This affects Log4j versions up to 1.2 up to 1.2.17.

CVSS 3.1 · 9.8 Critical EPSS 70.0% KEV · Not listed
Vendors
Apache Canonical Debian and 4 more
Products
Bookkeeper Log4j Ubuntu Linux and 23 more
CVE-2019-13118

libxslt: read of uninitialized stack data due to too narrow xsl:number instruction and an invalid character

In numbers.c in libxslt 1.1.33, a type holding grouping characters of an xsl:number instruction was too narrow and an invalid character/length combination could be passed to xsltNumberFormatDecimal, leading to a read of uninitialized stack data.

CVSS 3.1 · 5.3 Medium EPSS 5.1% KEV · Not listed
Vendors
Apple Canonical Fedoraproject and 4 more
Products
Icloud Iphone Os Itunes and 22 more
CVE-2019-13117

libxslt: an xsl number with certain format strings could lead to a uninitialized read in xsltNumberFormatInsertNumbers

In numbers.c in libxslt 1.1.33, an xsl:number with certain format strings could lead to a uninitialized read in xsltNumberFormatInsertNumbers. This could allow an attacker to discern whether a byte on the stack contains the characters A, a, I, i, or 0, or any other character.

CVSS 3.1 · 5.3 Medium EPSS 6.5% KEV · Not listed
Vendors
Canonical Debian Fedoraproject and 3 more
Products
Ubuntu Linux Debian Linux Fedora and 3 more
CVE-2019-11135

hw: TSX Transaction Asynchronous Abort (TAA)

TSX Asynchronous Abort condition on some CPUs utilizing speculative execution may allow an authenticated user to potentially enable information disclosure via a side channel with local access.

CVSS 3.1 · 6.5 Medium EPSS 3.1% KEV · Not listed
Vendors
Canonical Debian Fedoraproject and 6 more
Products
Ubuntu Linux Debian Linux Fedora and 309 more
CVE-2019-11068

libxslt: xsltCheckRead and xsltCheckWrite routines security bypass by crafted URL

libxslt through 1.1.33 allows bypass of a protection mechanism because callers of xsltCheckRead and xsltCheckWrite permit access even upon receiving a -1 error code. xsltCheckRead can return -1 for a crafted URL that is not actually invalid and is subsequently loaded.

CVSS 3.1 · 9.8 Critical EPSS 5.2% KEV · Not listed
Vendors
Canonical Debian Fedoraproject and 5 more
Products
Ubuntu Linux Debian Linux Fedora and 20 more
CVE-2017-5753

hw: cpu: speculative execution bounds-check bypass

Systems with microprocessors utilizing speculative execution and branch prediction may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis.

CVSS 3.1 · 5.6 Medium EPSS 93.8% KEV · Not listed
Vendors
Arm Canonical Debian and 11 more
Products
Cortex-a12 Cortex-a12 Firmware Cortex-a15 and 393 more
CVE-2015-2808

SSL/TLS: "Invariance Weakness" vulnerability in RC4 stream cipher

The RC4 algorithm, as used in the TLS protocol and SSL protocol, does not properly combine state data with key data during the initialization phase, which makes it easier for remote attackers to conduct plaintext-recovery attacks against the initial bytes of a stream by sniffing network traffic that occasionally relies on keys affected by the Invariance Weakness, and then using a brute-force approach involving LSB values, aka the "Bar Mitzvah" issue.

CVSS 3.1 · 3.7 Low EPSS 73.9% KEV · Not listed
Vendors
Canonical Debian Fujitsu and 6 more
Products
Ubuntu Linux Debian Linux Sparc Enterprise M3000 and 99 more
CVE-2015-4000

LOGJAM: TLS connections which support export grade DHE key-exchange are vulnerable to MITM attacks

The TLS protocol 1.2 and earlier, when a DHE_EXPORT ciphersuite is enabled on a server but not on a client, does not properly convey a DHE_EXPORT choice, which allows man-in-the-middle attackers to conduct cipher-downgrade attacks by rewriting a ClientHello with DHE replaced by DHE_EXPORT and then rewriting a ServerHello with DHE_EXPORT replaced by DHE, aka the "Logjam" issue.

CVSS 3.1 · 3.7 Low EPSS 99.9% KEV · Not listed
Vendors
Apple Canonical Debian and 10 more
Products
Iphone Os Mac Os X Safari and 28 more
CVE-2009-3555

TLS: MITM attacks via session renegotiation

The TLS protocol, and the SSL protocol 3.0 and possibly earlier, as used in Microsoft Internet Information Services (IIS) 7.0, mod_ssl in the Apache HTTP Server 2.2.14 and earlier, OpenSSL before 0.9.8l, GnuTLS 2.8.5 and earlier, Mozilla Network Security Services (NSS) 3.12.4 and earlier, multiple Cisco products, and other products, does not properly associate renegotiation handshakes with an existing connection, which allows man-in-the-middle attackers to insert data into HTTPS sessions, and possibly other types of sessions protected by TLS or SSL, by sending an unauthenticated request that is processed retroactively by a server in a post-renegotiation context, related to a "plaintext injection" attack, aka the "Project Mogul" issue.

CVSS 3.1 · 9.8 Critical EPSS 87.3% KEV · Not listed
Vendors
Apache Canonical Debian and 6 more
Products
Http Server Ubuntu Linux Debian Linux and 12 more