{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43035","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-05-01T14:12:55.977Z","datePublished":"2026-05-01T14:15:33.922Z","dateUpdated":"2026-05-11T22:16:27.484Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:16:27.484Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sched: cls_api: fix tc_chain_fill_node to initialize tcm_info to zero to prevent an info-leak\n\nWhen building netlink messages, tc_chain_fill_node() never initializes\nthe tcm_info field of struct tcmsg. Since the allocation is not zeroed,\nkernel heap memory is leaked to userspace through this 4-byte field.\n\nThe fix simply zeroes tcm_info alongside the other fields that are\nalready initialized."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/cls_api.c"],"versions":[{"version":"32a4f5ecd7381f30ae3bb36dea77a150ba68af2e","lessThan":"903c3405cfcc7700260e456ab66a5867586c9e69","status":"affected","versionType":"git"},{"version":"32a4f5ecd7381f30ae3bb36dea77a150ba68af2e","lessThan":"71a3eda7e850ae844cb8993065f4e410c11a46ce","status":"affected","versionType":"git"},{"version":"32a4f5ecd7381f30ae3bb36dea77a150ba68af2e","lessThan":"4ae5d23f51fb91d7d1140c6f1ba77ab0756054c3","status":"affected","versionType":"git"},{"version":"32a4f5ecd7381f30ae3bb36dea77a150ba68af2e","lessThan":"e35f5195cd44ff4053fbc5d71ea97681728a0099","status":"affected","versionType":"git"},{"version":"32a4f5ecd7381f30ae3bb36dea77a150ba68af2e","lessThan":"d6db08484c6cb3d4ad696246f9d288eceba2a078","status":"affected","versionType":"git"},{"version":"32a4f5ecd7381f30ae3bb36dea77a150ba68af2e","lessThan":"906997ea3766c24fbbf9cc4bf17c047315bbd138","status":"affected","versionType":"git"},{"version":"32a4f5ecd7381f30ae3bb36dea77a150ba68af2e","lessThan":"1091b3c174441a52fdbb92e2fe00338f9371a91c","status":"affected","versionType":"git"},{"version":"32a4f5ecd7381f30ae3bb36dea77a150ba68af2e","lessThan":"e6e3eb5ee89ac4c163d46429391c889a1bb5e404","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/cls_api.c"],"versions":[{"version":"4.19","status":"affected"},{"version":"0","lessThan":"4.19","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":"6.1.168","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.134","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.81","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.22","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.12","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":"4.19","versionEndExcluding":"5.10.253"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"5.15.203"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"6.1.168"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"6.6.134"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"6.12.81"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"6.18.22"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"6.19.12"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"7.0"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/903c3405cfcc7700260e456ab66a5867586c9e69"},{"url":"https://git.kernel.org/stable/c/71a3eda7e850ae844cb8993065f4e410c11a46ce"},{"url":"https://git.kernel.org/stable/c/4ae5d23f51fb91d7d1140c6f1ba77ab0756054c3"},{"url":"https://git.kernel.org/stable/c/e35f5195cd44ff4053fbc5d71ea97681728a0099"},{"url":"https://git.kernel.org/stable/c/d6db08484c6cb3d4ad696246f9d288eceba2a078"},{"url":"https://git.kernel.org/stable/c/906997ea3766c24fbbf9cc4bf17c047315bbd138"},{"url":"https://git.kernel.org/stable/c/1091b3c174441a52fdbb92e2fe00338f9371a91c"},{"url":"https://git.kernel.org/stable/c/e6e3eb5ee89ac4c163d46429391c889a1bb5e404"}],"title":"net: sched: cls_api: fix tc_chain_fill_node to initialize tcm_info to zero to prevent an info-leak","x_generator":{"engine":"bippy-1.2.0"}}}}