Ubuntu Security Advisories

Fabian Bäumer, Marcel Maehren, Marcus Brinkmann, and Jörg Schwenk discovered that Erlang OTP’s SSH module incorrect handled authentication. A remote attacker could use this issue to execute arbitrary commands without authentication, possibly leading to a system compromise.

It was discovered that the Ruby CGI gem incorrectly handled parsing certain cookies. A remote attacker could possibly use this issue to consume resources, leading to a denial of service. (CVE-2025-27219) It was discovered that the Ruby CGI gem incorrectly handled parsing certain regular expressions. A remote attacker could possibly use this issue to consume resources, leading to a denial of service. (CVE-2025-27220) It was discovered that the Ruby URI gem incorrectly handled certain URI handling methods. A remote attacker could possibly use this issue to leak authentication credentials. (CVE-2025-27221) It was discovered that the Ruby REXML gem incorrectly handled parsing XML documents containing many digits in a hex numeric character reference. A remote attacker could use this issue to consume resources, leading to a denial of service. (CVE-2024-49761)

It was discovered that the watch_queue event notification system contained an out-of-bounds write vulnerability. A local attacker could use this to cause a denial of service or escalate their privileges.)(CVE-2022-0995) In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential UAF in cifs_debug_files_proc_show() Skip sessions that are being teared down (status == SES_EXITING) to avoid UAF.)(CVE-2024-26928) In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential UAF in smb2_is_valid_lease_break() Skip sessions that are being teared down (status == SES_EXITING) to avoid UAF.)(CVE-2024-35864) In the Linux kernel, the following vulnerability has been resolved: HID: core: zero-initialize the report buffer Since the report buffer is used by all kinds of drivers in various ways, let's zero- initialize it during allocation to make sure that it can't be ever used to leak kernel memory via specially-crafted report.)(CVE-2024-50302) In the Linux kernel, the following vulnerability has been resolved: media: dvbdev: prevent the risk of out of memory access The dvbdev contains a static variable used to store dvb minors. The behavior of it depends if CONFIG_DVB_DYNAMIC_MINORS is set or not. When not set, dvb_register_device() won't check for boundaries, as it will rely that a previous call to dvb_register_adapter() would already be enforcing it. On a similar way, dvb_device_open() uses the assumption that the register functions already did the needed checks. This can be fragile if some device ends using different calls. This also generate warnings on static check analysers like Coverity. So, add explicit guards to prevent potential risk of OOM issues.)(CVE-2024-53063) In the Linux kernel, the following vulnerability has been resolved: jfs: add a check to prevent array-index-out-of-bounds in dbAdjTree When the value of lp is 0 at the beginning of the for loop, it will become negative in the next assignment and we should bail out.)(CVE-2024-56595) In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: Fix UAF in blkcg_unpin_online() blkcg_unpin_online() walks up the blkcg hierarchy putting the online pin. To walk up, it uses blkcg_parent(blkcg) but it was calling that after blkcg_destroy_blkgs(blkcg) which could free the blkcg, leading to the following UAF: ================================================================== BUG: KASAN: slab-use-after-free in blkcg_unpin_online+0x15a/0x270 Read of size 8 at addr ffff8881057678c0 by task kworker/9:1/117 CPU: 9 UID: 0 PID: 117 Comm: kworker/9:1 Not tainted 6.13.0-rc1-work-00182-gb8f52214c61a-dirty #48 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS unknown 02/02/2022 Workqueue: cgwb_release cgwb_release_workfn Call Trace: dump_stack_lvl+0x27/0x80 print_report+0x151/0x710 kasan_report+0xc0/0x100 blkcg_unpin_online+0x15a/0x270 cgwb_release_workfn+0x194/0x480 process_scheduled_works+0x71b/0xe20 worker_thread+0x82a/0xbd0 kthread+0x242/0x2c0 ret_from_fork+0x33/0x70 ret_from_fork_asm+0x1a/0x30 ... Freed by task 1944: kasan_save_track+0x2b/0x70 kasan_save_free_info+0x3c/0x50 __kasan_slab_free+0x33/0x50 kfree+0x10c/0x330 css_free_rwork_fn+0xe6/0xb30 process_scheduled_works+0x71b/0xe20 worker_thread+0x82a/0xbd0 kthread+0x242/0x2c0 ret_from_fork+0x33/0x70 ret_from_fork_asm+0x1a/0x30 Note that the UAF is not easy to trigger as the free path is indirected behind a couple RCU grace periods and a work item execution. I could only trigger it with artifical msleep() injected in blkcg_unpin_online(). Fix it by reading the parent pointer before destroying the blkcg's blkg's.)(CVE-2024-56672) In the Linux kernel, the following vulnerability has been resolved: drm/dp_mst: Ensure mst_primary pointer is valid in drm_dp_mst_handle_up_req() While receiving an MST up request message from one thread in drm_dp_mst_handle_up_req(), the MST topology could be removed from another thread via drm_dp_mst_topology_mgr_set_mst(false), freeing mst_primary and setting drm_dp_mst_topology_mgr::mst_primary to NULL. This could lead to a NULL deref/use-after-free of mst_primary in drm_dp_mst_handle_up_req(). Avoid the above by holding a reference for mst_primary in drm_dp_mst_handle_up_req() while it's used. v2: Fix kfreeing the request if getting an mst_primary reference fails.)(CVE-2024-57798)

It was discovered that QuickJS could be forced to reference uninitialized memory in certain instances. An attacker could possibly use this issue to cause QuickJS to crash, resulting in a denial of service, or execute arbitrary code. (CVE-2023-48183) It was discovered that QuickJS incorrectly managed memory in certain circumstances. An attacker could possibly use this issue to exhaust system resources, resulting in a denial of service. (CVE-2023-48184) It was discovered that QuickJS could be forced to crash due to a failing test. An attacker could possibly use this issue to cause a denial of service. (CVE-2024-33263)

Igor Pavlov discovered that 7-Zip had several memory-related issues. An attacker could possibly use these issues to cause 7-Zip to crash, resulting in a denial of service, or execute arbitrary code. (CVE-2023-52168, CVE-2023-52169)

USN-7161-1 and USN-7161-2 fixed CVE-2024-41110 for source package docker.io in Ubuntu 18.04 LTS and for source package docker.io-app in Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 24.10. This update fixes it for source package docker.io in Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 24.10. These updates only address the docker library and not the docker.io application itself, which was already patched in the previous USNs (USN-7161-1 and USN-7161-2). Original advisory details: Yair Zak discovered that Docker could unexpectedly forward DNS requests from internal networks in an unexpected manner. An attacker could possibly use this issue to exfiltrate data by encoding information in DNS queries to controlled nameservers. This issue was only addressed for the source package docker.io-app in Ubuntu 24.04 LTS. (CVE-2024-29018) Cory Snider discovered that Docker did not properly handle authorization plugin request processing. An attacker could possibly use this issue to bypass authorization controls by forwarding API requests without their full body, leading to unauthorized actions. This issue was only addressed for the source package docker.io-app in Ubuntu 24.10 and Ubuntu 24.04 LTS, and the source package docker.io in Ubuntu 18.04 LTS. (CVE-2024-41110)

It was discovered that the CImg library did not properly check the size of images before loading them. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 22.04 LTS. (CVE-2022-1325) It was discovered that the CImg library did not correctly handle certain memory operations, which could lead to a buffer overflow. An attacker could possibly use this issue to execute arbitrary code or cause a denial of service. (CVE-2024-26540)

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 arbitrary code execution.

It was discovered that Protocol Buffers incorrectly handled memory when receiving malicious input using the Java bindings. An attacker could possibly use this issue to cause a denial of service.

It was discovered that Perl incorrectly handled transliterating non-ASCII bytes. A remote attacker could use this issue to cause Perl to crash, resulting in a denial of service, or possibly execute arbitrary code.

It was discovered that GraphicsMagick did not properly limit image dimensions, which could lead to excessive memory consumption. An attacker could possibly use this issue to cause a denial of service. (CVE-2025-27795) It was discovered that GraphicsMagick did not properly handle certain memory operations, which could lead to a out-of-bounds memory access. An attacker could possibly use this issue to leak sensitive information. This issue only affected Ubuntu 24.10. (CVE-2025-27796)

It was discovered that libsoup could be made to read out of bounds. An attacker could possibly use this issue to cause applications using libsoup to crash, resulting in a denial of service. (CVE-2025-2784, CVE-2025-32050, CVE-2025-32052, CVE-2025-32053) It was discovered that libsoup could be made to dereference invalid memory. An attacker could possibly use this issue to cause applications using libsoup to crash, resulting in a denial of service. (CVE-2025-32051)

Aleandro Prudenzano and Edoardo Geraci discovered that HAProxy incorrectly handled certain uncommon configurations that replace multiple short patterns with a longer one. A remote attacker could use this issue to cause HAProxy to crash, resulting in a denial of service, or possibly execute arbitrary code.

Kim Alvefur discovered that Dino did not correctly sanitize certain messages. A remote attacker could possibly use this issue to leak sensitive information.

USN-7346-1 fixed vulnerabilities in OpenSC. The update introduced a regression which broke smartcard based authentication. This update fixes the problem. We apologize for the inconvenience. Original advisory details: It was discovered that OpenSC did not correctly handle certain memory operations, which could lead to a use-after-free vulnerability. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2021-42780) It was discovered that OpenSC did not correctly handle certain memory operations, which could lead to a stack buffer overflow. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. This issue only affected Ubuntu 20.04 LTS. (CVE-2021-42782) It was discovered that OpenSC did not correctly handle the length of certain buffers, which could lead to a out-of-bounds access vulnerability. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2023-2977) Deepanjan Pal discovered that OpenSC did not correctly authenticate a zero length PIN. A physically proximate attacker could possibly use this issue to gain unauthorized access to certain systems. This issue only affected Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2023-40660) It was discovered that OpenSC did not correctly handle certain memory operations. A physically proximate attacker could possibly use this issue to compromise key generation, certificate loading and other card management operations. This issue only affected Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2023-40661) Hubert Kario, Michal Shagam and Eyal Ronen discovered that OpenSC had a timing side-channel and incorrectly handled RSA padding. An attacker could possibly use this issue to recover sensitive information. This issue only affected Ubuntu 22.04 LTS. (CVE-2023-5992) Matteo Marini discovered that OpenSC did not properly manage memory due to certain uninitialized variables. A physically proximate attacker could possibly use this issue to gain unauthorized access to certain systems. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and Ubuntu 24.10. (CVE-2024-45615) Matteo Marini discovered that OpenSC did not correctly handle certain memory operations. A physically proximate attacker could possibly use this issue to gain unauthorized access to certain systems. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and Ubuntu 24.10. (CVE-2024-45616, CVE-2024-45617) Matteo Marini discovered that OpenSC did not correctly handle certain memory operations. A physically proximate attacker could possibly use this issue to gain unauthorized access to certain systems. (CVE-2024-45618, CVE-2024-45620) Matteo Marini discovered that OpenSC did not correctly handle certain memory operations. A physically proximate attacker could possibly use this issue to gain unauthorized access to certain systems. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and Ubuntu 24.10. (CVE-2024-45619) It was discovered that OpenSC did not correctly handle certain memory operations, which could lead to a buffer overflow. A physically proximate attacker could possibly use this issue to compromise card management operations during enrollment and modification. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and Ubuntu 24.10. (CVE-2024-8443)

USN-7426-1 fixed several vulnerabilities in poppler. This update provides the corresponding update for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. Original advisory details: It was discovered that poppler incorrectly handled memory when opening certain PDF files. An attacker could possibly use this issue to cause poppler to crash, resulting in a denial of service.

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: - Drivers core; - HID subsystem; - Network drivers; - SCSI subsystem; - SuperH / SH-Mobile drivers; - File systems infrastructure; - Ext4 file system; - JFS file system; - Network file system (NFS) client; - Memory management; - Network namespace; - CAIF protocol; - Networking core; - HSR network protocol; - IPv4 networking; - IPv6 networking; - MAC80211 subsystem; - Network traffic control; (CVE-2025-21702, CVE-2024-53227, CVE-2024-46826, CVE-2024-49952, CVE-2024-56600, CVE-2021-47235, CVE-2024-50265, CVE-2021-47119, CVE-2024-53165, CVE-2021-47483, CVE-2024-50302, CVE-2024-56595, CVE-2024-50167, CVE-2024-56658, CVE-2024-49948, CVE-2024-26921, CVE-2021-47602, CVE-2024-26863, CVE-2021-47320, CVE-2025-21700, CVE-2021-47122)

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: - Drivers core; - HID subsystem; - Network drivers; - SCSI subsystem; - SuperH / SH-Mobile drivers; - File systems infrastructure; - Ext4 file system; - JFS file system; - Network file system (NFS) client; - Memory management; - Network namespace; - CAIF protocol; - Networking core; - HSR network protocol; - IPv4 networking; - IPv6 networking; - MAC80211 subsystem; - Network traffic control; (CVE-2025-21702, CVE-2024-53227, CVE-2024-46826, CVE-2024-49952, CVE-2024-56600, CVE-2021-47235, CVE-2024-50265, CVE-2021-47119, CVE-2024-53165, CVE-2021-47483, CVE-2024-50302, CVE-2024-56595, CVE-2024-50167, CVE-2024-56658, CVE-2024-49948, CVE-2024-26921, CVE-2021-47602, CVE-2024-26863, CVE-2021-47320, CVE-2025-21700, CVE-2021-47122)

Demi Marie Obenour and Simon Gaiser discovered that several Xen para- virtualization device frontends did not properly restrict the access rights of device backends. An attacker could possibly use a malicious Xen backend to gain access to memory pages of a guest VM or cause a denial of service in the guest. (CVE-2022-23041) 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: - HID subsystem; - Network drivers; - Mellanox network drivers; - SCSI subsystem; - SuperH / SH-Mobile drivers; - File systems infrastructure; - Ext4 file system; - JFS file system; - IP tunnels definitions; - Network namespace; - BPF subsystem; - Networking core; - HSR network protocol; - IPv4 networking; - IPv6 networking; - Network traffic control; (CVE-2024-56615, CVE-2024-56600, CVE-2025-21700, CVE-2024-56658, CVE-2024-35960, CVE-2024-50265, CVE-2025-21702, CVE-2024-53227, CVE-2024-53165, CVE-2024-50167, CVE-2024-26863, CVE-2024-35973, CVE-2024-46826, CVE-2021-47119, CVE-2024-50302, CVE-2024-49952, CVE-2021-47101, CVE-2024-49948, CVE-2024-56595)

Demi Marie Obenour and Simon Gaiser discovered that several Xen para- virtualization device frontends did not properly restrict the access rights of device backends. An attacker could possibly use a malicious Xen backend to gain access to memory pages of a guest VM or cause a denial of service in the guest. (CVE-2022-23041) 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: - HID subsystem; - Network drivers; - Mellanox network drivers; - SCSI subsystem; - SuperH / SH-Mobile drivers; - File systems infrastructure; - Ext4 file system; - JFS file system; - IP tunnels definitions; - Network namespace; - BPF subsystem; - Networking core; - HSR network protocol; - IPv4 networking; - IPv6 networking; - Network traffic control; (CVE-2024-56615, CVE-2024-56600, CVE-2025-21700, CVE-2024-56658, CVE-2024-35960, CVE-2024-50265, CVE-2025-21702, CVE-2024-53227, CVE-2024-53165, CVE-2024-50167, CVE-2024-26863, CVE-2024-35973, CVE-2024-46826, CVE-2021-47119, CVE-2024-50302, CVE-2024-49952, CVE-2021-47101, CVE-2024-49948, CVE-2024-56595)