{"id":"CVE-2025-68819","state":"PUBLISHED","title":"media: dvb-usb: dtv5100: fix out-of-bounds in dtv5100_i2c_msg()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: dvb-usb: dtv5100: fix out-of-bounds in dtv5100_i2c_msg()\n\nrlen value is a user-controlled value, but dtv5100_i2c_msg() does not\ncheck the size of the rlen value. Therefore, if it is set to a value\nlarger than sizeof(st->data), an out-of-bounds vuln occurs for st->data.\n\nTherefore, we need to add proper range checking to prevent this vuln.","publishedAt":"2026-01-13T15:29:22.695Z","updatedAt":"2026-10-19T18:15:10.171Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"60688d5e6e6e2ae62f29762d1e3b2aec2dbd3817","status":"affected","lessThan":"c2c293ea7b61f12cdaad1e99a5b4efc58c88960a","versionType":"git"},{"version":"60688d5e6e6e2ae62f29762d1e3b2aec2dbd3817","status":"affected","lessThan":"c2305b4c5fc15e20ac06c35738e0578eb4323750","versionType":"git"},{"version":"60688d5e6e6e2ae62f29762d1e3b2aec2dbd3817","status":"affected","lessThan":"61f214a878e96e2a8750bf96a98f78c658dba60c","versionType":"git"},{"version":"60688d5e6e6e2ae62f29762d1e3b2aec2dbd3817","status":"affected","lessThan":"4a54d8fcb093761e4c56eb211cf4e39bf8401fa1","versionType":"git"},{"version":"60688d5e6e6e2ae62f29762d1e3b2aec2dbd3817","status":"affected","lessThan":"fe3e129ab49806aaaa3f22067ebc75c2dfbe4658","versionType":"git"},{"version":"60688d5e6e6e2ae62f29762d1e3b2aec2dbd3817","status":"affected","lessThan":"ac92151ff2494130d9fc686055d6bbb9743a673e","versionType":"git"},{"version":"60688d5e6e6e2ae62f29762d1e3b2aec2dbd3817","status":"affected","lessThan":"b91e6aafe8d356086cc621bc03e35ba2299e4788","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/usb/dvb-usb/dtv5100.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.28","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.28","versionType":"semver"},{"version":"5.10.248","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.198","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.160","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.120","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.64","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.3","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/usb/dvb-usb/dtv5100.c"]}],"references":["https://git.kernel.org/stable/c/c2c293ea7b61f12cdaad1e99a5b4efc58c88960a","https://git.kernel.org/stable/c/c2305b4c5fc15e20ac06c35738e0578eb4323750","https://git.kernel.org/stable/c/61f214a878e96e2a8750bf96a98f78c658dba60c","https://git.kernel.org/stable/c/4a54d8fcb093761e4c56eb211cf4e39bf8401fa1","https://git.kernel.org/stable/c/fe3e129ab49806aaaa3f22067ebc75c2dfbe4658","https://git.kernel.org/stable/c/ac92151ff2494130d9fc686055d6bbb9743a673e","https://git.kernel.org/stable/c/b91e6aafe8d356086cc621bc03e35ba2299e4788"],"weaknesses":["CWE-787"],"ingestedAt":"2026-10-29T20:09:56.034Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/68xxx/CVE-2025-68819.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-68819","state":"PUBLISHED","datePublished":"2026-01-13T15:29:22.695Z","dateUpdated":"2026-10-19T18:15:10.171Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-12-24T10:30:51.048Z"},"containers":{"cna":{"title":"media: dvb-usb: dtv5100: fix out-of-bounds in dtv5100_i2c_msg()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: dvb-usb: dtv5100: fix out-of-bounds in dtv5100_i2c_msg()\n\nrlen value is a user-controlled value, but dtv5100_i2c_msg() does not\ncheck the size of the rlen value. Therefore, if it is set to a value\nlarger than sizeof(st->data), an out-of-bounds vuln occurs for st->data.\n\nTherefore, we need to add proper range checking to prevent this vuln."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"60688d5e6e6e2ae62f29762d1e3b2aec2dbd3817","status":"affected","lessThan":"c2c293ea7b61f12cdaad1e99a5b4efc58c88960a","versionType":"git"},{"version":"60688d5e6e6e2ae62f29762d1e3b2aec2dbd3817","status":"affected","lessThan":"c2305b4c5fc15e20ac06c35738e0578eb4323750","versionType":"git"},{"version":"60688d5e6e6e2ae62f29762d1e3b2aec2dbd3817","status":"affected","lessThan":"61f214a878e96e2a8750bf96a98f78c658dba60c","versionType":"git"},{"version":"60688d5e6e6e2ae62f29762d1e3b2aec2dbd3817","status":"affected","lessThan":"4a54d8fcb093761e4c56eb211cf4e39bf8401fa1","versionType":"git"},{"version":"60688d5e6e6e2ae62f29762d1e3b2aec2dbd3817","status":"affected","lessThan":"fe3e129ab49806aaaa3f22067ebc75c2dfbe4658","versionType":"git"},{"version":"60688d5e6e6e2ae62f29762d1e3b2aec2dbd3817","status":"affected","lessThan":"ac92151ff2494130d9fc686055d6bbb9743a673e","versionType":"git"},{"version":"60688d5e6e6e2ae62f29762d1e3b2aec2dbd3817","status":"affected","lessThan":"b91e6aafe8d356086cc621bc03e35ba2299e4788","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/usb/dvb-usb/dtv5100.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.28","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.28","versionType":"semver"},{"version":"5.10.248","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.198","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.160","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.120","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.64","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.3","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/usb/dvb-usb/dtv5100.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/c2c293ea7b61f12cdaad1e99a5b4efc58c88960a"},{"url":"https://git.kernel.org/stable/c/c2305b4c5fc15e20ac06c35738e0578eb4323750"},{"url":"https://git.kernel.org/stable/c/61f214a878e96e2a8750bf96a98f78c658dba60c"},{"url":"https://git.kernel.org/stable/c/4a54d8fcb093761e4c56eb211cf4e39bf8401fa1"},{"url":"https://git.kernel.org/stable/c/fe3e129ab49806aaaa3f22067ebc75c2dfbe4658"},{"url":"https://git.kernel.org/stable/c/ac92151ff2494130d9fc686055d6bbb9743a673e"},{"url":"https://git.kernel.org/stable/c/b91e6aafe8d356086cc621bc03e35ba2299e4788"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The vulnerable path is reached through an I2C_RDWR ioctl on the local /dev/i2c-N device; network, RF, and USB responses do not control rlen.\nAC:L - An attacker can reliably submit a two-message transaction with a second-message length up to 8192 bytes, requiring no race or condition outside their control.\nPR:L - The ioctl path has no capability or authentication check, so an unprivileged local account with ordinary device-node DAC access can trigger it.\nUI:N - Once the affected DVB adapter and i2c-dev interface are present, the attacker can trigger the overflow without another user's action.\nS:U - Exploitation compromises the host kernel from a local process without crossing a separate virtualization or IOMMU security authority.\nC:H - The attacker-controlled overflow can corrupt adjacent kernel objects and plausibly enable control-flow hijacking or primitives exposing arbitrary kernel memory.\nI:H - Up to 8192 attacker-controlled bytes are copied into an 80-byte heap object, providing a large heap-corruption primitive suitable for arbitrary modification or code execution.\nA:H - The overflow can corrupt critical kernel state and cause an oops or panic, while hardened bounds checking may itself terminate the kernel."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-05T12:11:46.937Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.28","versionEndExcluding":"5.10.248"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.28","versionEndExcluding":"5.15.198"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.28","versionEndExcluding":"6.1.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.28","versionEndExcluding":"6.6.120"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.28","versionEndExcluding":"6.12.64"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.28","versionEndExcluding":"6.18.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.28","versionEndExcluding":"6.19"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2025-68819","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-10-16T15:05:32.291287Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-787","lang":"en","type":"CWE","description":"CWE-787 Out-of-bounds Write"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-19T18:15:10.171Z"}}]}}}