{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-31405", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-03-09T15:48:24.086Z", "datePublished": "2026-04-06T07:33:00.544Z", "dateUpdated": "2026-08-05T12:22:14.323Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:22:14.323Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: dvb-net: fix OOB access in ULE extension header tables\n\nThe ule_mandatory_ext_handlers[] and ule_optional_ext_handlers[] tables\nin handle_one_ule_extension() are declared with 255 elements (valid\nindices 0-254), but the index htype is derived from network-controlled\ndata as (ule_sndu_type & 0x00FF), giving a range of 0-255. When\nhtype equals 255, an out-of-bounds read occurs on the function pointer\ntable, and the OOB value may be called as a function pointer.\n\nAdd a bounds check on htype against the array size before either table\nis accessed. Out-of-range values now cause the SNDU to be discarded." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL" }, "scenarios": [ { "lang": "en", "value": "AV:N - Malformed DVB ULE SNDUs can be delivered as received network/transport-stream data to a configured DVB network interface. In the highest reasonable deployment, an attacker controlling or injecting into the DVB/IP broadcast feed can reach the vulnerable parser remotely without local device access.\nAC:L - The attacker only needs to craft a valid ULE SNDU with htype 255 and a correct CRC on the selected PID. There is no race or condition outside attacker control once the victim is receiving the ULE feed.\nPR:N - Creating the DVB network interface is CAP_SYS_ADMIN-gated on the victim, but exploitation occurs through inbound transport-stream data after setup. The sender of the malicious ULE packet needs no privileges on the victim system.\nUI:N - No victim action is required to process the malicious SNDU once the DVB network interface is active and receiving. Packet handling occurs asynchronously in the demux receive callback.\nS:U - The vulnerable code executes in the kernel and impacts the same operating-system security authority. There is no VM, IOMMU, or separate sandbox boundary crossed.\nC:H - The bug performs an out-of-bounds read from a kernel function-pointer table and may invoke the resulting pointer in kernel context. Treating the possible control-flow hijack at the higher severity, successful exploitation can expose kernel memory.\nI:H - The out-of-bounds table value may be called as a function pointer, creating a potential kernel control-flow hijack. Under the higher-severity rule, this is scored as potential kernel code execution and arbitrary modification.\nA:H - An invalid or unintended function-pointer call in kernel context can directly trigger an oops or panic. The malicious packet can be sent repeatedly to sustain denial of service." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/media/dvb-core/dvb_net.c" ], "versions": [ { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "e51238718217c4abdb3ccc3b0c0cde265c7ec629", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "b2bd2ee73b697c177157bba534e1b1064c2e66a0", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "29ef43ceb121d67b87f4cbb08439e4e9e732eff8", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "1a6da3dbb9985d00743073a1cc1f96e59f5abc30", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "145e50c2c700fa52b840df7bab206043997dd18e", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "8bde543d2a5f935ba2a6a6325a2e02f8a9256fbe", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "f2b65dcb78c8990e4c68a906627433be1fe38a92", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "24d87712727a5017ad142d63940589a36cd25647", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/media/dvb-core/dvb_net.c" ], "versions": [ { "version": "2.6.12", "status": "affected" }, { "version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.253", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.203", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.167", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.130", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.78", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.19", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19.9", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.10.253" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.15.203" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.1.167" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.6.130" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.12.78" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.18.19" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.19.9" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "7.0" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/e51238718217c4abdb3ccc3b0c0cde265c7ec629" }, { "url": "https://git.kernel.org/stable/c/b2bd2ee73b697c177157bba534e1b1064c2e66a0" }, { "url": "https://git.kernel.org/stable/c/29ef43ceb121d67b87f4cbb08439e4e9e732eff8" }, { "url": "https://git.kernel.org/stable/c/1a6da3dbb9985d00743073a1cc1f96e59f5abc30" }, { "url": "https://git.kernel.org/stable/c/145e50c2c700fa52b840df7bab206043997dd18e" }, { "url": "https://git.kernel.org/stable/c/8bde543d2a5f935ba2a6a6325a2e02f8a9256fbe" }, { "url": "https://git.kernel.org/stable/c/f2b65dcb78c8990e4c68a906627433be1fe38a92" }, { "url": "https://git.kernel.org/stable/c/24d87712727a5017ad142d63940589a36cd25647" } ], "title": "media: dvb-net: fix OOB access in ULE extension header tables", "x_generator": { "engine": "bippy-1.2.0" } } } }