OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.17, a network-adjacent attacker can send a crafted SNMP response to the CUPS SNMP backend that causes an out-of-bounds read of up to 176 bytes past a stack buffer. The leaked memory is converted from UTF-16 to UTF-8 and stored as printer supply description strings, which are subsequently visible to authenticated users via IPP Get-Printer-Attributes responses and the CUPS web interface. This vulnerability is fixed in 2.4.17.

According to the versions of the cups packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

    OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In     versions 2.4.16 and prior, there is a heap-based buffer overflow in the CUPS scheduler when building     filter option strings from job attribute. At time of publication, there are no publicly available     patches.(CVE-2026-34979)

    OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In     versions 2.4.16 and prior, a local unprivileged user can coerce cupsd into authenticating to an attacker-     controlled localhost IPP service with a reusable Authorization: Local ... token. That token is enough to     drive /admin/ requests on localhost, and the attacker can combine CUPS-Create-Local-Printer with printer-     is-shared=true to persist a file:///... queue even though the normal FileDevice policy rejects such URIs.
    Printing to that queue gives an arbitrary root file overwrite; the PoC below uses that primitive to drop a     sudoers fragment and demonstrate root command execution. At time of publication, there are no publicly     available patches.(CVE-2026-34990)

    OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In     versions 2.4.16 and prior, the RSS notifier allows .. path traversal in notify-recipient-uri (e.g.,     rss:///../job.cache), letting a remote IPP client write RSS XML bytes outside CacheDir/rss (anywhere that     is lp-writable). In particular, because CacheDir is group-writable by default (typically root:lp and mode     0770), the notifier (running as lp) can replace root-managed state files via temp-file + rename(). This     PoC clobbers CacheDir/job.cache with RSS XML, and after restarting cupsd the scheduler fails to parse the     job cache and previously queued jobs disappear. At time of publication, there are no publicly available     patches.(CVE-2026-34978)

    OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In     versions 2.4.16 and prior, a use-after-free vulnerability exists in the CUPS scheduler (cupsd) when     temporary printers are automatically deleted. cupsdDeleteTemporaryPrinters() in scheduler/printers.c calls     cupsdDeletePrinter() without first expiring subscriptions that reference the printer, leaving     cupsd_subscription_t.dest as a dangling pointer to freed heap memory. The dangling pointer is subsequently     dereferenced at multiple code sites, causing a crash (denial of service) of the cupsd daemon. With heap     grooming, this can be leveraged for code execution.(CVE-2026-39316)

    OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In     versions 2.4.16 and prior, in a network-exposed cupsd with a shared target queue, an unauthorized client     can send a Print-Job to that shared PostScript queue without authentication. The server accepts a page-     border value supplied as textWithoutLanguage, preserves an embedded newline through option escaping and     reparse, and then reparses the resulting second-line PPD: text as a trusted scheduler control record. A     follow-up raw print job can therefore make the server execute an attacker-chosen existing binary such as     /usr/bin/vim as lp. At time of publication, there are no publicly available patches.(CVE-2026-34980)

    OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In     versions 2.4.16 and prior, an integer underflow vulnerability in _ppdCreateFromIPP() (cups/ppd-cache.c)     allows any unprivileged local user to crash the cupsd root process by supplying a negative job-password-     supported IPP attribute. The bounds check only caps the upper bound, so a negative value passes     validation, is cast to size_t (wrapping to ~2^64), and is used as the length argument to memset() on a     33-byte stack buffer. This causes an immediate SIGSEGV in the cupsd root process. Combined with systemd's     Restart=on-failure, an attacker can repeat the crash for sustained denial of service.(CVE-2026-39314)

    OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In     versions 2.4.16 and prior, CUPS daemon (cupsd) contains an authorization bypass vulnerability due to case-     insensitive username comparison during authorization checks. The vulnerability allows an unprivileged user     to gain unauthorized access to restricted operations by using a user with a username that differs only in     case from an authorized user. At time of publication, there are no publicly available     patches.(CVE-2026-27447)

    OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior     to 2.4.17, a network-adjacent attacker can send a crafted SNMP response to the CUPS SNMP backend that     causes an out-of-bounds read of up to 176 bytes past a stack buffer. The leaked memory is converted from     UTF-16 to UTF-8 and stored as printer supply description strings, which are subsequently visible to     authenticated users via IPP Get-Printer-Attributes responses and the CUPS web interface. This     vulnerability is fixed in 2.4.17.(CVE-2026-41079)

Tenable has extracted the preceding description block directly from the EulerOS cups security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8405-1 advisory.

    Ariel Silver discovered that CUPS incorrectly handled username comparisons during authorization checks. A     local attacker could possibly use this issue to gain unauthorized access to restricted operations.
    (CVE-2026-27447)

    Asim Viladi Oglu Manizada discovered that CUPS incorrectly handled notify-recipient-uri values in the RSS     notifier. A remote attacker could possibly use this issue to overwrite lp-writable files and cause a     denial of service. (CVE-2026-34978)

    Jacob Newman discovered that CUPS incorrectly handled filter option strings when processing job     attributes. An attacker could use this issue to cause CUPS to crash, resulting in a denial of service, or     possibly execute arbitrary code. (CVE-2026-34979)

    Asim Viladi Oglu Manizada discovered that CUPS incorrectly handled page-border values in shared PostScript     queues. A remote attacker could possibly use this issue to execute arbitrary code. (CVE-2026-34980)

    Asim Viladi Oglu Manizada discovered that CUPS incorrectly handled localhost authentication to attacker-     controlled IPP services. A local attacker could possibly use this issue to overwrite arbitrary files and     execute arbitrary code. (CVE-2026-34990)

    Tomer Fichman discovered that CUPS incorrectly handled negative job-password-supported values. A local     attacker could possibly use this issue to cause CUPS to crash, resulting in a denial of service.
    (CVE-2026-39314)

    Tomer Fichman discovered that CUPS incorrectly handled temporary printer deletion. An attacker could     possibly use this issue to cause CUPS to crash, resulting in a denial of service, or to execute arbitrary     code. (CVE-2026-39316)

    Tomer Fichman discovered that CUPS incorrectly handled certain malformed SNMP responses. An attacker could     possibly use this issue to obtain sensitive information. (CVE-2026-41079)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:20812-1 advisory.

    This update for cups fixes the following issues

    - CVE-2026-27447: Authorization bypass via case-insensitive group-member lookup (bsc#1261572).
    - CVE-2026-34978: Path traversal in RSS notify-recipient-uri enables file write outside CacheDir/rss     (bsc#1261571).
    - CVE-2026-34979: Heap overflow in `get_options()` (bsc#1261570).
    - CVE-2026-34980: Shared PostScript queue lets anonymous Print-Job requests reach `lp` code execution over     the network       (bsc#1261569).
    - CVE-2026-34990: Local print admin token disclosure using temporary printers (bsc#1261568).
    - CVE-2026-39314: negative `job-password-supported` attribute can lead to a denial of service     (bsc#1261743).
    - CVE-2026-39316: dangling subscription pointer can lead to a denial of service (bsc#1261742).
    - CVE-2026-41079: crafted SNMP response can lead to stack-based out-of-bounds read and sensitive memory     disclosure       (bsc#1263116).

    Changes for cups:

    - Version upgrade to 2.4.19.

    - Version upgrade to 2.4.18.

    - Version upgrade to 2.4.17:

     * The scheduler followed symbolic links when cleaning out      its temporary directory (Issue #1448)
     * Updated `cupsFileGetConf` and `cupsFilePutConf` to escape      more characters.
     * Updated man page `cancel` (Issue #984)
     * Updated `cupsRasterReadHeader` to validate more of the      page header values (Issue #1501)
     * Fixed an issue with the class/printer CGI name checking.
     * Fixed infinite loop in `http_write()` on busy print servers      (Issue #827)
     * Fixed potential TLS blocking issues (Issue #1128)
     * Fixed a job history bug in the scheduler (Issue #1440)
     * Fixed notifier logging bug that would result in nul bytes      getting into the log (Issue #1450)
     * Fixed possible use-after-free in `cupsdReadClient()`      (Issue #1454)
     * Fixed a document format bug in the IPP backend (Issue #1457)
     * Fixed DRAIN_OUTPUT race condition (Issue #1461)
     * Fixed a bug when then `ippFindXxx` and `ippSetXxx` functions      were mixed.
     * Fixed the mapping of supply type keywords to SNMP names.
     * Fixed a bug in the IPP backend when SNMP was disabled.
     * Fixed a crash bug in the rastertoepson filter.
     * Fixed a bug in cgiCheckVariables.
     * Fixed handling read/write errors with OpenSSL (Issue #1506)
     * Fixed handling rehandshake error in `_httpTLSRead`      (Issue #1508)
     * Fixed a debug printf bug on Windows (Issue #1529)
     * Fixed a recursion issue with encoding of nested collections      (Issue #1539)
     * Fixed parsing of the `LimitRequestBody`, `MaxLogSize`,      and `MaxRequestSize` directives in cupsd.conf (Issue #1540)
     * Fixed a parsing bug in `ipptool` (Issue #1542)
     * Fixed blank line detection in the `rastertolabel` filter      (Issue #1545)
     * Fixed `httpPeek` edge case on compressed streams

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1668 advisory.

    OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In     versions 2.4.16 and prior, CUPS daemon (cupsd) contains an authorization bypass vulnerability due to case-     insensitive username comparison during authorization checks. The vulnerability allows an unprivileged user     to gain unauthorized access to restricted operations by using a user with a username that differs only in     case from an authorized user. At time of publication, there are no publicly available patches.
    (CVE-2026-27447)

    OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior     to 2.4.17, a network-adjacent attacker can send a crafted SNMP response to the CUPS SNMP backend that     causes an out-of-bounds read of up to 176 bytes past a stack buffer. The leaked memory is converted from     UTF-16 to UTF-8 and stored as printer supply description strings, which are subsequently visible to     authenticated users via IPP Get-Printer-Attributes responses and the CUPS web interface. This     vulnerability is fixed in 2.4.17. (CVE-2026-41079)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

An update of the cups package has been released.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior     to 2.4.17, a network-adjacent attacker can send a crafted SNMP response to the CUPS SNMP backend that     causes an out-of-bounds read of up to 176 bytes past a stack buffer. The leaked memory is converted from     UTF-16 to UTF-8 and stored as printer supply description strings, which are subsequently visible to     authenticated users via IPP Get-Printer-Attributes responses and the CUPS web interface. This     vulnerability is fixed in 2.4.17. (CVE-2026-41079)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
326220	EulerOS 2.0 SP12 : cups (EulerOS-SA-2026-2522)	Nessus	Huawei Local Security Checks	medium
326172	EulerOS 2.0 SP12 : cups (EulerOS-SA-2026-2582)	Nessus	Huawei Local Security Checks	medium
320390	Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS : CUPS vulnerabilities (USN-8405-1)	Nessus	Ubuntu Local Security Checks	medium
317701	openSUSE 16 Security Update : cups (openSUSE-SU-2026:20812-1)	Nessus	SuSE Local Security Checks	medium
315651	Amazon Linux 2023 : cups, cups-client, cups-devel (ALAS2023-2026-1668)	Nessus	Amazon Linux Local Security Checks	medium
312114	Photon OS 4.0: Cups PHSA-2026-4.0-1008	Nessus	PhotonOS Local Security Checks	medium
311396	Photon OS 5.0: Cups PHSA-2026-5.0-0837	Nessus	PhotonOS Local Security Checks	medium
310521	Linux Distros Unpatched Vulnerability : CVE-2026-41079	Nessus	Misc.	medium

Detections

Analytics

CVE-2026-41079

medium

Tenable Plugins

medium

medium

medium

medium

medium

medium

medium

medium