In the Linux kernel, the following vulnerability has been resolved: crypto: ccp - Fix snp_filter_reserved_mem_regions() off-by-one Sash…
CVE-2026-74404 · published 15 Aug 2026
How serious is it
- Severity: high, CVSS score 7.8 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-74404?
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Who is affected
- Linux Linux: 6.9
How to check
- Find out whether you run the affected product and which version, then compare it with the versions above.
How to fix
Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
- Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
- If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
In the Linux kernel, the following vulnerability has been resolved:
crypto: ccp - Fix snp_filter_reserved_mem_regions() off-by-one
Sashiko notes:
> regarding the bounds check in snp_filter_reserved_mem_regions()
> called via walk_iomem_res_desc(): does the check
> if ((range_list->num_elements * 16 + 8) > PAGE_SIZE)
> allow an off-by-one heap buffer overflow?
>
> If range_list->num_elements is 255, 255 * 16 + 8 = 4088, which is <= 4096.
> Writing range->base (8 bytes) fills 4088-4095, but writing range->page_count
> (4 bytes) would write to 4096-4099, overflowing the kzalloc-allocated
> PAGE_SIZE buffer.
Fix this by accounting for the entry about to be written to, in addition to
the entries that are already allocated.
Check your whole app
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References
- git.kernel.org/stable/c/1b864b6cb213bbd7b406e9b2e98c962077f300df
- git.kernel.org/stable/c/830c1f3e71989448652973375ef5e39b6ede47a3
- git.kernel.org/stable/c/af7341616b742ad2c374a90998bd650a035f694d
- git.kernel.org/stable/c/c5c79d92da0f9a09f48be5e2aabed2d6d1a96294
Merged from NVD. Last updated 24 Oct 2026. All vulnerabilities · RSS · JSON