USN-8256-1: opam vulnerability

Andrew Nesbitt discovered that opam did not properly validate file destination paths in package install files. An attacker could use this issue to bypass sandbox protections and write files to arbitrary locations, possibly leading to arbitrary code execution...

USN-8257-1: Linux kernel (Raspberry Pi) vulnerabilities

Josh Eads, Kristoffer Janke, Eduardo Vela Nava, Tavis Ormandy, and Matteo Rizzo discovered that some AMD Zen processors did not properly verify the signature of CPU microcode. This flaw is known as EntrySign. A privileged attacker could possibly use this issue to cause load malicious CPU microcod...

USN-8255-1: Linux kernel vulnerabilities

Stonejiajia, Shir Tamari and Sagi Tzadik discovered that the OverlayFS implementation in the Ubuntu Linux kernel did not properly perform permission checks in certain situations. A local attacker could possibly use this to gain elevated privileges. CVE-2023-2640 Shir Tamari and Sagi Tzadik...

USN-8246-1: Vim vulnerabilities

Michał Majchrowicz discovered that Vim’s zip plugin could overwrite arbitrary files. An attacker could possibly use this issue to delete sensitive data or execute arbitrary code. This issue only affected Ubuntu 26.04 LTS. CVE-2026-35177 It was discovered that Vim’s netbeans interface did not...

USN-8254-1: Linux kernel vulnerabilities

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - Network drivers; - NVME drivers; - Netfilter; CVE-2026-23112, CVE-2026-23231, CVE-2026-23273...

USN-8253-1: Postfix vulnerability

Kamil Frankowicz discovered that Postfix incorrectly handled certain enhanced status codes. A remote attacker could possibly use this issue to cause Postfix to crash, resulting in a denial of service...

USN-8252-1: OpenJPEG vulnerability

It was discovered that OpenJPEG did not properly handle memory when encoding image files. An attacker could use this issue to cause OpenJPEG to crash, resulting in a denial of service, or possibly execute arbitrary code...

USN-8251-1: libpng vulnerabilities

It was discovered that libpng incorrectly handled memory when processing certain PNG files. If a user or automated system were tricked into opening a specially crafted PNG file, an attacker could use this issue to cause libpng to crash, resulting in a denial of service, or possibly execute...

USN-8250-1: Little CMS vulnerability

It was discovered that Little CMS incorrectly handled certain malformed ICC profiles. An attacker could possibly use this issue to cause Little CMS to crash, resulting in a denial of service...

USN-8249-1: dpkg vulnerability

Yashashree Gund discovered that the dpkg dpkg-deb tool incorrectly handled certain zstd-compressed .deb archives. If a user or automated system were tricked into manipulating a specially crafted .deb archive, a remote attacker could possibly use this issue to cause dpkg-deb to stop responding,...

USN-8248-1: NASM vulnerabilities

Daisy Chen discovered that NASM was vulnerable to a heap buffer overflow when handling certain input. An attacker could possibly use this issue to cause NASM to crash, resulting in a denial of service, or possibly execute arbitrary code. CVE-2023-31722 It was discovered that NASM incorrectly...

USN-8247-1: OWSLib vulnerability

It was discovered that OWSLib did not properly disable entity resolution within its XML parser. An attacker could possibly use this issue to read arbitrary files via a crafted XML payload...

USN-8245-1: Linux kernel vulnerabilities

Josh Eads, Kristoffer Janke, Eduardo Vela Nava, Tavis Ormandy, and Matteo Rizzo discovered that some AMD Zen processors did not properly verify the signature of CPU microcode. This flaw is known as EntrySign. A privileged attacker could possibly use this issue to cause load malicious CPU microcod...

USN-8244-1: Linux kernel vulnerabilities

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - Network drivers; - NVME drivers; - Netfilter; CVE-2026-23112, CVE-2026-23231, CVE-2026-23273...

USN-8243-1: Linux kernel (Azure) vulnerabilities

Qualys discovered that several vulnerabilities existed in the AppArmor Linux kernel Security Module LSM. An unprivileged local attacker could use these issues to load, replace, and remove arbitrary AppArmor profiles causing denial of service, exposure of sensitive information kernel memory, local...

USN-8242-2: PostfixAdmin vulnerability

USN-8242-1 fixed a vulnerability in CiviCRM. This update provides the corresponding fix for PostfixAdmin. Original advisory details: Takuya Aramaki discovered that Smarty, vendored in CiviCRM, did not properly escape JavaScript code. An attacker could possibly use this issue to conduct a cross-si...

USN-8242-1: CiviCRM vulnerability

Takuya Aramaki discovered that Smarty, vendored in CiviCRM, did not properly escape JavaScript code. An attacker could possibly use this issue to conduct a cross-site scripting attack...

USN-8179-4: Linux kernel (GCP) vulnerabilities

Josh Eads, Kristoffer Janke, Eduardo Vela Nava, Tavis Ormandy, and Matteo Rizzo discovered that some AMD Zen processors did not properly verify the signature of CPU microcode. This flaw is known as EntrySign. A privileged attacker could possibly use this issue to cause load malicious CPU microcod...

USN-8235-1: ITK vulnerabilities

It was discovered that Expat, vendored in ITK incorrectly handled certain files. An attacker could possibly use this issue to cause a crash or execute arbitrary code. CVE-2022-25235, CVE-2022-25236...

USN-8241-1: Coin3D vulnerabilities

It was discovered that Expat, vendored in Coin3D incorrectly handled certain files. An attacker could possibly use this issue to cause a crash or execute arbitrary code...

USN-8240-1: Swish-e vulnerabilities

It was discovered that Expat, vendored in Swish-e incorrectly handled certain files. An attacker could possibly use this issue to cause a crash or execute arbitrary code. CVE-2022-25235, CVE-2022-25236...

USN-8239-1: Apache HTTP Server vulnerabilities

Bartlomiej Dmitruk and Stanislaw Strzalkowski discovered that Apache HTTP Server incorrectly handled certain memory operations when using the HTTP/2 protocol. A remote attacker could use this issue to cause Apache HTTP Server to crash, resulting in a denial of service, or possibly execute arbitra...

USN-8233-2: nghttp2 vulnerability

USN-8233-1 fixed a vulnerability in nghttp2. This update provides the corresponding update for Ubuntu 26.04 LTS. Original advisory details: Andrew MacPherson discovered that nghttp2 did not properly validate internal state when the session termination API was called. A remote attacker could...

USN-8238-1: EditorConfig vulnerability

It was discovered that EditorConfig incorrectly handled specially crafted configuration files. A local attacker could possibly use this issue to cause EditorConfig to crash, resulting in a denial of service...

USN-8237-1: WebKitGTK vulnerabilities

Several security issues were discovered in the WebKitGTK Web and JavaScript engines. If a user were tricked into viewing a malicious website, a remote attacker could exploit a variety of issues related to web browser security, including cross-site scripting attacks, denial of service attacks, and...

USN-8231-1: Dynaconf vulnerability

It was discovered that Dynaconf was incorrectly handling template evaluation in its string resolvers. A remote attacker could possibly use this issue to execute arbitrary code...

USN-8236-1: Slurm vulnerabilities

It was discovered that Slurm did not correctly handle certain file system operations. An attacker could possibly use this issue to modify files or leak sensitive information. This issue only affected Ubuntu 22.04 LTS. CVE-2023-41914 Ryan Hall discovered that Slurm did not correctly enforce certai...

USN-8230-1: Docker vulnerabilities

It was discovered that BuildKit, contained within Docker, incorrectly handled file path validation when processing frontend API messages. An attacker could possibly use this issue to write files outside of the intended state directory. CVE-2026-33747 It was discovered that BuildKit, contained...

USN-8220-1: HtmlUnit vulnerability

It was discovered that HtmlUnit was vulnerable to remote code execution via XSLT when browsing an attacker-controlled webpage. An attacker could possibly use this issue to execute arbitrary code in the context of the application using HtmlUnit...

USN-8234-1: Mako vulnerability

It was discovered that Mako incorrectly handled URIs with double-slash prefixes in TemplateLookup. A remote attacker could possibly use this issue to obtain sensitive information...

USN-8233-1: nghttp2 vulnerability

Andrew MacPherson discovered that nghttp2 did not properly validate internal state when the session termination API was called. A remote attacker could possibly use this issue to cause nghttp2 to crash, resulting in a denial of service...

USN-8232-1: Django vulnerabilities

It was discovered that Django did not vary cached response headers on cookies when sessions were not modified while SESSIONSAVEEVERYREQUEST was enabled. A remote attacker could possibly use this issue to steal a user's session. CVE-2026-35192 Kyle Agronick and Jacob Walls discovered that Django...

USN-8229-1: sed vulnerability

Michał Majchrowicz and Marcin Wyczechowski discovered that sed incorrectly handled symbolic links when performing in-place edits. A local attacker could possibly use this issue to overwrite arbitrary files...

USN-8228-1: Exim vulnerabilities

It was discovered that Exim incorrectly handled parsing malformed JSON in message headers. A remote attacker could possibly use this issue to execute arbitrary code. CVE-2026-40685 It was discovered that Exim incorrectly handled processing of UTF-8 trailing characters. A remote attacker could...

USN-8227-1: curl vulnerabilities

It was discovered that curl incorrectly reused non-TLS connections when TLS was required in some STARTTLS configurations. A remote attacker could possibly use this issue to obtain sensitive information. CVE-2026-4873 It was discovered that curl incorrectly reused certain HTTP Negotiate connection...

USN-8226-2: kmod update

USN-8226-1 added a mitigation to kmod to disable loading the algifaead module. This update adds the same mitigation to Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. Original advisory details: It was discovered that the Linux kernel algifaead module contained a logic...

USN-8226-1: kmod update

It was discovered that the Linux kernel algifaead module contained a logic flaw allowing a local attacker to escalate privileges to root. This update to the kmod package disables loading the algifaead module as a measure to mitigate the issue until kernel updates are made available. See the...

USN-8218-1: zuluCrypt vulnerability

Aaron Rainbolt discovered that zuluCrypt used insecure PolicyKit settings in zuluPolkit. An attacker could possibly use this issue to cause local privilege escalation to root. CVE-2025-53391...

USN-8225-1: Python marshmallow vulnerabilities

Jared Deckard discovered that Python marshmallow did not correctly handle hiding certain fields. An attacker could possibly use this issue to leak sensitive information. This issue only affected Ubuntu 18.04 LTS. CVE-2018-17175 It was discovered that Python marshmallow did not efficiently handle...

USN-8223-1: Roundcube Webmail vulnerabilities

It was discovered that Roundcube Webmail mishandled Punycode xn-- domain names. An attacker could possibly use this issue to cause a homograph attack. CVE-2019-15237 It was discovered that Roundcube Webmail did not properly sanitize certain attributes when handling CSS within HTML messages and...

USN-8224-1: Linux kernel (BlueField) vulnerabilities

Qualys discovered that several vulnerabilities existed in the AppArmor Linux kernel Security Module LSM. An unprivileged local attacker could use these issues to load, replace, and remove arbitrary AppArmor profiles causing denial of service, exposure of sensitive information kernel memory, local...

USN-8222-1: OpenSSH vulnerabilities

Christos Papakonstantinou discovered that the OpenSSH scp tool incorrectly handled the legacy scp protocol -O option. This could result in certain files being installed setuid or setgid, contrary to expectations. CVE-2026-35385 Florian Kohnhäuser discovered that OpenSSH incorrectly handled shell...

USN-8195-3: PackageKit vulnerability

USN-8195-1 fixed a vulnerability in PackageKit. This update provides the corresponding fix to Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. Original advisory details: It was discovered that PackageKit incorrectly handled certain transactions. A local attacker could use this issue to...

USN-8221-1: wheel vulnerability

It was discovered that wheel did not correctly handle certain file paths. If a user or automated system were tricked into opening a specially crafted file, an attacker could possibly use this issue to execute arbitrary code...

USN-8198-2: Tornado vulnerabilities

USN-8198-1 fixed vulnerabilities in Tornado. This update provides the corresponding updates for Ubuntu 26.04 LTS. Original advisory details: It was discovered that Tornado incorrectly handled parsing of large multipart request bodies. An attacker could possibly use this issue to cause a denial of...

USN-8219-1: UltraJSON vulnerabilities

Cameron Criswell discovered that UltraJSON contained a memory leak that would occur when parsing large integers. An attacker could possibly use this issue to cause UltraJSON to crash, resulting in a denial of service. This issue only affected Ubuntu 24.04 LTS, Ubuntu 25.10, and Ubuntu 26.04 LTS...

USN-8185-2: Linux kernel (Low Latency NVIDIA) vulnerabilities

Josh Eads, Kristoffer Janke, Eduardo Vela Nava, Tavis Ormandy, and Matteo Rizzo discovered that some AMD Zen processors did not properly verify the signature of CPU microcode. This flaw is known as EntrySign. A privileged attacker could possibly use this issue to cause load malicious CPU microcod...

USN-8217-1: follow-redirects vulnerabilities

It was discovered that follow-redirects did not properly protect sensitive user information during redirects. An attacker could possibly use this issue to expose sensitive information. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. CVE-2022-0155 It was discovered that...

USN-8190-2: Rack::Session vulnerability

USN-8190-1 fixed a vulnerability in Rack::Session. This update provides the corresponding update for Ubuntu 26.04 LTS. Original advisory details: SeungMyung Lee discovered that Rack::Session did not properly reject cookies upon decryption failure. A remote attacker could use this issue to...

USN-8136-2: Dovecot regression

USN-8136-1 fixed vulnerabilities in Dovecot. The update caused a regression on Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. This update fixes the problem. We apologize for the inconvenience. Original advisory details: It was discovered that Dovecot incorrectly handled invalid base64 SASL data. An...