CVE-2026-43256 media: qcom: camss: vfe: Fix out-of-bounds access in vfe_isr_reg_update()
Out-of-bounds memory access in the Qualcomm CAMSS VFE driver allows attackers to cause denial of service or execute arbitrary code.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-43256?
CVE-2026-43256 is a high-severity memory corruption vulnerability in Linux kernel, published on 6 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
media: qcom: camss: vfe: Fix out-of-bounds access in vfe_isr_reg_update()
vfe_isr() iterates using MSM_VFE_IMAGE_MASTERS_NUM(7) as the loop bound and passes the index to vfe_isr_reg_update(). However, vfe->line[] array is defined with VFE_LINE_NUM_MAX(4):
struct vfe_line line[VFE_LINE_NUM_MAX];
When index is 4, 5, 6, the access to vfe->line[line_id] exceeds the array bounds and resulting in out-of-bounds memory access.
Fix this by using separate loops for output lines and write masters.
Weakness: CWE-125
Which versions are affected by CVE-2026-43256?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-43256?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-43256 being exploited?
There is no known exploitation of CVE-2026-43256 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-43256, DEBIAN-CVE-2026-43256, GHSA-f426-43f4-xjrc, ROOT-OS-UBUNTU-2404-CVE-2026-43256, UBUNTU-CVE-2026-43256.