Vulnerability in Linux kernel (CVE-2026-43302)
Summary
Vulnerability in Linux kernel (CVE-2026-43302). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the source.
In the Linux kernel, the following vulnerability has been resolved:
drm/v3d: Set DMA segment size to avoid debug warnings
When using V3D rendering with CONFIG_DMA_API_DEBUG enabled, the
kernel occasionally reports a segment size mismatch. This is because
'max_seg_size' is not set. The kernel defaults to 64K. setting
'max_seg_size' to the maximum will prevent 'debug_dma_map_sg()'
from complaining about the over-mapping of the V3D segment length.
DMA-API: v3d 1002000000.v3d: mapping sg segment longer than device
claims to support [len=8290304] [max=65536]
WARNING: CPU: 0 PID: 493 at kernel/dma/debug.c:1179 debug_dma_map_sg+0x330/0x388
CPU: 0 UID: 0 PID: 493 Comm: Xorg Not tainted 6.12.53-yocto-standard #1
Hardware name: Raspberry Pi 5 Model B Rev 1.0 (DT)
pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : debug_dma_map_sg+0x330/0x388
lr : debug_dma_map_sg+0x330/0x388
sp : ffff8000829a3ac0
x29: ffff8000829a3ac0 x28: 0000000000000001 x27: ffff8000813fe000
x26: ffffc1ffc0000000 x25: ffff00010fdeb760 x24: 0000000000000000
x23: ffff8000816a9bf0 x22: 0000000000000001 x21: 0000000000000002
x20: 0000000000000002 x19: ffff00010185e810 x18: ffffffffffffffff
x17: 69766564206e6168 x16: 74207265676e6f6c x15: 20746e656d676573
x14: 20677320676e6970 x13: 5d34303334393134 x12: 0000000000000000
x11: 00000000000000c0 x10: 00000000000009c0 x9 : ffff8000800e0b7c
x8 : ffff00010a315ca0 x7 : ffff8000816a5110 x6 : 0000000000000001
x5 : 000000000000002b x4 : 0000000000000002 x3 : 0…
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-43302 has been found in Linux kernel.
Risk of unauthorized operations or information disclosure. CVSS score: 5.5/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Linux kernel CVE-2026-43302" on the vendor's site.
CVE-2026-43302 (Linux kernel) — CWE-131 / CVSS v3 5.5
Attack vector: local / no user interaction
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-131) exists in Linux kernel.
Check the vendor advisory for the affected versions of Linux kernel.
Severity: Medium (CVSS 5.5/10). Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで Linux kernel を使っているサービスとバージョンを洗い出す。
-
2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
Fix status by distribution
Fixed packages published by each distribution for this CVE
- BellSoft Alpaquita BELL-CVE-2026-43302 linux-lts Fixed in: 6.1.167-r0
- Debian DEBIAN-CVE-2026-43302 linux
- Ubuntu UBUNTU-CVE-2026-43302 linux
References
- advisory nvd.nist.gov
- advisory github.com
- package git.kernel.org
- web git.kernel.org
- web git.kernel.org
- web git.kernel.org
- web git.kernel.org
- web git.kernel.org
- web git.kernel.org
- web git.kernel.org
- web github.com