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CVE-2026-31405— media: dvb-net: fix OOB access in ULE extension header tables

CVSS 9.8 · Critical EPSS 0.04% · P13
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I. Basic Information for CVE-2026-31405

Vulnerability Information
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Vulnerability Title
media: dvb-net: fix OOB access in ULE extension header tables
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: media: dvb-net: fix OOB access in ULE extension header tables The ule_mandatory_ext_handlers[] and ule_optional_ext_handlers[] tables in handle_one_ule_extension() are declared with 255 elements (valid indices 0-254), but the index htype is derived from network-controlled data as (ule_sndu_type & 0x00FF), giving a range of 0-255. When htype equals 255, an out-of-bounds read occurs on the function pointer table, and the OOB value may be called as a function pointer. Add a bounds check on htype against the array size before either table is accessed. Out-of-range values now cause the SNDU to be discarded.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于未验证扩展头类型索引，可能导致越界读取和函数指针调用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ~ e51238718217c4abdb3ccc3b0c0cde265c7ec629 -
LinuxLinux 2.6.12 -

II. Public POCs for CVE-2026-31405

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III. Intelligence Information for CVE-2026-31405

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Same Patch Batch · Linux · 2026-04-06 · 6 CVEs total

CVE-2026-314088.8 HIGHBluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold
CVE-2026-314098.8 HIGHksmbd: unset conn->binding on failed binding request
CVE-2026-314067.8 HIGHxfrm: Fix work re-schedule after cancel in xfrm_nat_keepalive_net_fini()
CVE-2026-314077.1 HIGHnetfilter: conntrack: add missing netlink policy validations
CVE-2026-31410ksmbd: use volume UUID in FS_OBJECT_ID_INFORMATION

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-31405

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