CVE-2026-74444
In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: validate…
- Risk score
- 62/100
- CVSS
- 7.8 v3.1
- Exploit chance (30 days)
- 0.1%
- Published
- 15 Aug 2026
Open in the live forecast Today's forecast
What to know
- What it is
- In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: validate DRAW_PRIMITIVES header size before division vmw_cmd_draw() computes maxnum = (header->size - sizeof(cmd->body)) / sizeof(*decl); where header->size is u32 and is taken straight from the user-supplied command stream. When header->s…
- Affected
- Canonical Ubuntu Linux
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- No known exploitation
Story map
At a glance
Canonical Ubuntu Linux: Red, act today. A vulnerability exists in NGINX Plus and NGINX Open Source when a map directive uses regex matching and the root directive or access log format references the map's regex capture variables before referencing the map output variable. An unauthenticated attacker can exploit this vulnerability by sending crafted HTTP requests, causing a heap buffer overflow in the NGINX worker process leading to a restart, or potential…
The flaws
- CVE-2026-74444: In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: validate… (CVSS 7.8 · EPSS 0%)
- CVE-2026-93479: Heap buffer overflow can lead to remote code execution (CVSS 8.1 · EPSS 1%)
- CVE-2026-15176: Heap buffer overflow can lead to remote code execution (CVSS 8.1 · EPSS 1%)
- CVE-2026-97205: NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_core_module module (CVSS 8.1 · EPSS 1%)
The fix
Fix: Check the linked advisory for the concrete fix.
Who is exposed: {'products': ['NGINX Plus', 'NGINX Open Source'], 'packages': [], 'versions': []}
Where it stands
- No known exploitation
How it unfolded
- 26 Oct, Ubuntu security notices (official): USN-8955-1: nginx vulnerabilities
- 3 Nov, Ubuntu security notices (official): USN-8960-1: Linux kernel (OEM) vulnerabilities
- 3 Nov, Ubuntu security notices (official): USN-8959-1: Linux kernel vulnerabilities
Connects to
- Same weakness: Heap buffer overflow (CWE-122). 398 other warnings in 30 days
- Same product: Earlier Canonical Ubuntu Linux warnings. 96 in the last 90 days
Why it is Amber
- CVSS 7.8 high
- On your watchlist: linux kernel
- Named in a government or vendor bulletin
Government and vendor bulletins
References
- https://ubuntu.com/security/notices/USN-8959-1
- https://ubuntu.com/security/notices/USN-8960-1
- https://git.kernel.org/stable/c/112c6ff29a56f3a22db4d5af869697aa07035ad6
- https://git.kernel.org/stable/c/2666cddf0dd218aa9bd1f99db688d1b532eac21a
- https://git.kernel.org/stable/c/85891d174707d8bddcec7a888fb4e1d17def34f3
- https://git.kernel.org/stable/c/b89ca4bba820f79dde52af15ee139fe6e8bbc314
- https://git.kernel.org/stable/c/bef30317fcb4c838a37bceb2fc76256eb6b975c1
- https://git.kernel.org/stable/c/c77cf8edae2bd3a1599115301cc7c98d0c78e731
- https://git.kernel.org/stable/c/dc0be7662b7b0ce28cb5eea864737793ed7b9e70
- https://git.kernel.org/stable/c/fc0c02f510e41650df3479f96e257acf87d8a20a
Original description
In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: validate DRAW_PRIMITIVES header size before division vmw_cmd_draw() computes maxnum = (header->size - sizeof(cmd->body)) / sizeof(*decl); where header->size is u32 and is taken straight from the user-supplied command stream. When header->size is less than sizeof(cmd->body) the unsigned subtraction wraps to nearly 4 GiB, producing a huge maxnum. Any user-controlled cmd->body.numVertexDecls then passes the bound and the loop dereferences decl[i] far past the end of the kernel command bounce buffer, producing an out-of-bounds read of kernel memory. Reject undersized headers up front.
Last activity 3 Nov 2026. Patch Forecast updates every hour.