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CVE Vendors Products Updated CVSS v3.1
CVE-2021-40656 1 Libsixel 1 Libsixel 2026-04-24 8.8 High
libsixel before 1.10 is vulnerable to Buffer Overflow in libsixel/src/quant.c:867.
CVE-2019-19635 1 Saitoha 1 Libsixel 2026-04-24 9.8 Critical
An issue was discovered in libsixel 1.8.2. There is a heap-based buffer overflow in the function sixel_decode_raw_impl at fromsixel.c.
CVE-2019-20094 1 Saitoha 1 Libsixel 2026-04-24 8.8 High
An issue was discovered in libsixel 1.8.4. There is a heap-based buffer overflow in the function gif_init_frame at fromgif.c.
CVE-2019-20140 1 Saitoha 1 Libsixel 2026-04-24 8.8 High
An issue was discovered in libsixel 1.8.4. There is a heap-based buffer overflow in the function gif_out_code at fromgif.c.
CVE-2020-21548 1 Saitoha 1 Libsixel 2026-04-24 8.8 High
Libsixel 1.8.3 contains a heap-based buffer overflow in the sixel_encode_highcolor function in tosixel.c.
CVE-2019-20024 1 Saitoha 1 Libsixel 2026-04-24 6.5 Medium
A heap-based buffer overflow was discovered in image_buffer_resize in fromsixel.c in libsixel before 1.8.4.
CVE-2020-21547 1 Saitoha 1 Libsixel 2026-04-24 8.8 High
Libsixel 1.8.2 contains a heap-based buffer overflow in the dither_func_fs function in tosixel.c.
CVE-2020-21050 1 Saitoha 1 Libsixel 2026-04-24 6.5 Medium
Libsixel prior to v1.8.3 contains a stack buffer overflow in the function gif_process_raster at fromgif.c.
CVE-2019-19638 1 Saitoha 1 Libsixel 2026-04-24 9.8 Critical
An issue was discovered in libsixel 1.8.2. There is a heap-based buffer overflow in the function load_pnm at frompnm.c, due to an integer overflow.
CVE-2018-19762 1 Saitoha 1 Libsixel 2026-04-24 N/A
There is a heap-based buffer overflow at fromsixel.c (function: image_buffer_resize) in libsixel 1.8.2 that will cause a denial of service or possibly unspecified other impact.
CVE-2020-21677 1 Saitoha 1 Libsixel 2026-04-24 6.5 Medium
A heap-based buffer overflow in the sixel_encoder_output_without_macro function in encoder.c of Libsixel 1.8.4 allows attackers to cause a denial of service (DOS) via converting a crafted PNG file into Sixel format.
CVE-2022-27044 1 Saitoha 1 Libsixel 2026-04-24 8.8 High
libsixel 1.8.6 is affected by Buffer Overflow in libsixel/src/quant.c:876.
CVE-2026-6349 1 Hgiga 2 Isherlock-audit, Isherlock-base 2026-04-24 9.8 Critical
The  iSherlock developed by HGiga  has an OS Command Injection vulnerability, allowing unauthenticated local attackers to inject arbitrary OS commands and execute them on the server.
CVE-2026-27879 1 Grafana 1 Grafana 2026-04-24 6.5 Medium
A resample query can be used to trigger out-of-memory crashes in Grafana.
CVE-2026-23326 1 Linux 1 Linux Kernel 2026-04-23 7.8 High
In the Linux kernel, the following vulnerability has been resolved: xsk: Fix fragment node deletion to prevent buffer leak After commit b692bf9a7543 ("xsk: Get rid of xdp_buff_xsk::xskb_list_node"), the list_node field is reused for both the xskb pool list and the buffer free list, this causes a buffer leak as described below. xp_free() checks if a buffer is already on the free list using list_empty(&xskb->list_node). When list_del() is used to remove a node from the xskb pool list, it doesn't reinitialize the node pointers. This means list_empty() will return false even after the node has been removed, causing xp_free() to incorrectly skip adding the buffer to the free list. Fix this by using list_del_init() instead of list_del() in all fragment handling paths, this ensures the list node is reinitialized after removal, allowing the list_empty() to work correctly.
CVE-2026-23323 1 Linux 1 Linux Kernel 2026-04-23 7.8 High
In the Linux kernel, the following vulnerability has been resolved: hwmon: (macsmc) Fix regressions in Apple Silicon SMC hwmon driver The recently added macsmc-hwmon driver contained several critical bugs in its sensor population logic and float conversion routines. Specifically: - The voltage sensor population loop used the wrong prefix ("volt-" instead of "voltage-") and incorrectly assigned sensors to the temperature sensor array (hwmon->temp.sensors) instead of the voltage sensor array (hwmon->volt.sensors). This would lead to out-of-bounds memory access or data corruption when both temperature and voltage sensors were present. - The float conversion in macsmc_hwmon_write_f32() had flawed exponent logic for values >= 2^24 and lacked masking for the mantissa, which could lead to incorrect values being written to the SMC. Fix these issues to ensure correct sensor registration and reliable manual fan control. Confirm that the reported overflow in FIELD_PREP is fixed by declaring macsmc_hwmon_write_f32() as __always_inline for a compile test.
CVE-2026-30999 1 Ffmpeg 1 Ffmpeg 2026-04-23 7.5 High
A heap buffer overflow in the av_bprint_finalize() function of FFmpeg v8.0.1 allows attackers to cause a Denial of Service (DoS) via a crafted input.
CVE-2026-6067 1 Nasm 2 Nasm, Netwide Assembler 2026-04-23 7.5 High
A heap buffer overflow vulnerability exists in the Netwide Assembler (NASM) due to a lack of bounds checking in the obj_directive() function. This vulnerability can be exploited by a user assembling a malicious .asm file, potentially leading to heap memory corruption, denial of service (crash), and arbitrary code execution.
CVE-2026-40303 2 Netfoundry, Openziti 2 Zrok, Zrok 2026-04-23 7.5 High
zrok is software for sharing web services, files, and network resources. Prior to version 2.0.1, endpoints.GetSessionCookie parses an attacker-supplied cookie chunk count and calls make([]string, count) with no upper bound before any token validation occurs. The function is reached on every request to an OAuth-protected proxy share, allowing an unauthenticated remote attacker to trigger gigabyte-scale heap allocations per request, leading to process-level OOM termination or repeated goroutine panics. Both publicProxy and dynamicProxy are affected. Version 2.0.1 patches the issue.
CVE-2026-33414 3 Containers, Microsoft, Podman Project 3 Podman, Windows, Podman 2026-04-23 7.8 High
Podman is a tool for managing OCI containers and pods. Versions 4.8.0 through 5.8.1 contain a command injection vulnerability in the HyperV machine backend in pkg/machine/hyperv/stubber.go, where the VM image path is inserted into a PowerShell double-quoted string without sanitization, allowing $() subexpression injection. Because PowerShell evaluates subexpressions inside double-quoted strings before executing the outer command, an attacker who can control the VM image path through a crafted machine name or image directory can execute arbitrary PowerShell commands with the privileges of the Podman process. On typical Windows installations this means SYSTEM-level code execution, and only Windows is affected as the code is exclusive to the HyperV backend. This issue has been patched in version 5.8.2.