{"id":"CVE-2026-89730","state":"PUBLISHED","title":"fpga: altera-cvp: Avoid out-of-bounds read in trailing byte write","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfpga: altera-cvp: Avoid out-of-bounds read in trailing byte write\n\nThe trailing byte path in altera_cvp_send_block() dereferences a u32\npointer even when only 1-3 bytes remain in the input buffer. If the buffer\nends at a page or scatterlist boundary, this can read past the valid image\ndata and fault.\n\nCopy the remaining bytes into a zero-initialized u32 before writing the\nfinal word so only valid bytes are read from the input buffer.","publishedAt":"2026-09-11T19:46:40.581Z","updatedAt":"2026-10-19T08:51:43.578Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"34d1dc17ce978ae76e676d401b48fe9d004aa948","status":"affected","lessThan":"447b3c893987a0106a65f04b62ec3271892e9d98","versionType":"git"},{"version":"34d1dc17ce978ae76e676d401b48fe9d004aa948","status":"affected","lessThan":"3b8938f5fbcf4a918785f9cb4b108782eb4ea717","versionType":"git"},{"version":"34d1dc17ce978ae76e676d401b48fe9d004aa948","status":"affected","lessThan":"2564ac3d3b8b47cd9692a5bf42d668ed7218b54e","versionType":"git"},{"version":"34d1dc17ce978ae76e676d401b48fe9d004aa948","status":"affected","lessThan":"8f3365ed2a5db2ac95ab70a6c47561db39d24537","versionType":"git"},{"version":"34d1dc17ce978ae76e676d401b48fe9d004aa948","status":"affected","lessThan":"b138bc665e21d4422382ab43aebdf0a2b7bb9cb3","versionType":"git"},{"version":"34d1dc17ce978ae76e676d401b48fe9d004aa948","status":"affected","lessThan":"827ec385458adeeda651de2b6f3537e386b1a8d9","versionType":"git"},{"version":"34d1dc17ce978ae76e676d401b48fe9d004aa948","status":"affected","lessThan":"4dc1051939e499c838229af035464a5fc7671198","versionType":"git"},{"version":"34d1dc17ce978ae76e676d401b48fe9d004aa948","status":"affected","lessThan":"9da70a43b5fea60d758137f7f0ccfe19356cb5bb","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/fpga/altera-cvp.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.14","versionType":"semver"},{"version":"5.10.270","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.109","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.50","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.4","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/fpga/altera-cvp.c"]}],"references":["https://git.kernel.org/stable/c/447b3c893987a0106a65f04b62ec3271892e9d98","https://git.kernel.org/stable/c/3b8938f5fbcf4a918785f9cb4b108782eb4ea717","https://git.kernel.org/stable/c/2564ac3d3b8b47cd9692a5bf42d668ed7218b54e","https://git.kernel.org/stable/c/8f3365ed2a5db2ac95ab70a6c47561db39d24537","https://git.kernel.org/stable/c/b138bc665e21d4422382ab43aebdf0a2b7bb9cb3","https://git.kernel.org/stable/c/827ec385458adeeda651de2b6f3537e386b1a8d9","https://git.kernel.org/stable/c/4dc1051939e499c838229af035464a5fc7671198","https://git.kernel.org/stable/c/9da70a43b5fea60d758137f7f0ccfe19356cb5bb"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/89xxx/CVE-2026-89730.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-89730","state":"PUBLISHED","datePublished":"2026-09-11T19:46:40.581Z","dateUpdated":"2026-10-19T08:51:43.578Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.760Z"},"containers":{"cna":{"title":"fpga: altera-cvp: Avoid out-of-bounds read in trailing byte write","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nfpga: altera-cvp: Avoid out-of-bounds read in trailing byte write\n\nThe trailing byte path in altera_cvp_send_block() dereferences a u32\npointer even when only 1-3 bytes remain in the input buffer. If the buffer\nends at a page or scatterlist boundary, this can read past the valid image\ndata and fault.\n\nCopy the remaining bytes into a zero-initialized u32 before writing the\nfinal word so only valid bytes are read from the input buffer."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"34d1dc17ce978ae76e676d401b48fe9d004aa948","status":"affected","lessThan":"447b3c893987a0106a65f04b62ec3271892e9d98","versionType":"git"},{"version":"34d1dc17ce978ae76e676d401b48fe9d004aa948","status":"affected","lessThan":"3b8938f5fbcf4a918785f9cb4b108782eb4ea717","versionType":"git"},{"version":"34d1dc17ce978ae76e676d401b48fe9d004aa948","status":"affected","lessThan":"2564ac3d3b8b47cd9692a5bf42d668ed7218b54e","versionType":"git"},{"version":"34d1dc17ce978ae76e676d401b48fe9d004aa948","status":"affected","lessThan":"8f3365ed2a5db2ac95ab70a6c47561db39d24537","versionType":"git"},{"version":"34d1dc17ce978ae76e676d401b48fe9d004aa948","status":"affected","lessThan":"b138bc665e21d4422382ab43aebdf0a2b7bb9cb3","versionType":"git"},{"version":"34d1dc17ce978ae76e676d401b48fe9d004aa948","status":"affected","lessThan":"827ec385458adeeda651de2b6f3537e386b1a8d9","versionType":"git"},{"version":"34d1dc17ce978ae76e676d401b48fe9d004aa948","status":"affected","lessThan":"4dc1051939e499c838229af035464a5fc7671198","versionType":"git"},{"version":"34d1dc17ce978ae76e676d401b48fe9d004aa948","status":"affected","lessThan":"9da70a43b5fea60d758137f7f0ccfe19356cb5bb","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/fpga/altera-cvp.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.14","versionType":"semver"},{"version":"5.10.270","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.109","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.50","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.4","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/fpga/altera-cvp.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/447b3c893987a0106a65f04b62ec3271892e9d98"},{"url":"https://git.kernel.org/stable/c/3b8938f5fbcf4a918785f9cb4b108782eb4ea717"},{"url":"https://git.kernel.org/stable/c/2564ac3d3b8b47cd9692a5bf42d668ed7218b54e"},{"url":"https://git.kernel.org/stable/c/8f3365ed2a5db2ac95ab70a6c47561db39d24537"},{"url":"https://git.kernel.org/stable/c/b138bc665e21d4422382ab43aebdf0a2b7bb9cb3"},{"url":"https://git.kernel.org/stable/c/827ec385458adeeda651de2b6f3537e386b1a8d9"},{"url":"https://git.kernel.org/stable/c/4dc1051939e499c838229af035464a5fc7671198"},{"url":"https://git.kernel.org/stable/c/9da70a43b5fea60d758137f7f0ccfe19356cb5bb"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T08:51:43.578Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"5.10.270"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"5.15.221"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"6.1.188"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"6.12.109"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"6.18.50"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"7.2.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}