{"api_version":"1","generated_at":"2026-08-22T21:52:59+00:00","cve":"CVE-2026-74719","urls":{"html":"https://cve.report/CVE-2026-74719","api":"https://cve.report/api/cve/CVE-2026-74719.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74719","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74719"},"summary":{"title":"net/smc: fix qentry overwrite for CONFIRM_LINK and ADD_LINK_CONT in smc_llc_event_handler()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: fix qentry overwrite for CONFIRM_LINK and ADD_LINK_CONT in smc_llc_event_handler()\n\nThe SMC_LLC_CONFIRM_LINK / SMC_LLC_ADD_LINK_CONT branch in\nsmc_llc_event_handler() stores an incoming qentry into the local LLC flow\nwithout first checking whether a qentry is already pending. If a malicious or\nbuggy peer sends a second CONFIRM_LINK or ADD_LINK_CONT request while a flow is\nactive and flow->qentry is already set, smc_llc_flow_qentry_set() overwrites the\npointer without freeing the previous allocation, leaking one kmalloc-96 object\nper spurious message.\n\nThe sibling SMC_LLC_DELETE_LINK branch already has the correct !flow->qentry\nguard. Apply the same guard to the CONFIRM_LINK/ADD_LINK_CONT branch so that a\nduplicate message when qentry is already occupied falls through to break and is\nfreed by the kfree(qentry) at the out: label, rather than silently leaking the\nexisting allocation.\n\nThe response direction (smc_llc_rx_response()) is unaffected: it already guards\nwith flow->qentry at the equivalent site and drops duplicate responses\ncorrectly.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-22 16:16:46","updated_at":"2026-08-22 16:16:46"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/c23c409228629107203d3c3e95fff1473173f1a6","name":"https://git.kernel.org/stable/c/c23c409228629107203d3c3e95fff1473173f1a6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/bfc336a9fbbf09805f3dfe25c195a4db90af2846","name":"https://git.kernel.org/stable/c/bfc336a9fbbf09805f3dfe25c195a4db90af2846","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/976245094925bab9bc39366b2e9ab44ffcde61d0","name":"https://git.kernel.org/stable/c/976245094925bab9bc39366b2e9ab44ffcde61d0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e0eb87677c76b157cdf8eb7c1f19e56227165a33","name":"https://git.kernel.org/stable/c/e0eb87677c76b157cdf8eb7c1f19e56227165a33","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e384f3cba6ea709f5b2272b1770db4ce14047f78","name":"https://git.kernel.org/stable/c/e384f3cba6ea709f5b2272b1770db4ce14047f78","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/10cb31b2b74cb664c6c95cf72364d7d5c483ab82","name":"https://git.kernel.org/stable/c/10cb31b2b74cb664c6c95cf72364d7d5c483ab82","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/06734dfeaeba886aab1bf147249195b888ac3e4d","name":"https://git.kernel.org/stable/c/06734dfeaeba886aab1bf147249195b888ac3e4d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a1e980d7a9e7ee6faf4f5fd7b450413b969af26d","name":"https://git.kernel.org/stable/c/a1e980d7a9e7ee6faf4f5fd7b450413b969af26d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74719","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74719","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0fb0b02bd6fd26cba38002be4a6bbcae2228fd44 e384f3cba6ea709f5b2272b1770db4ce14047f78 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0fb0b02bd6fd26cba38002be4a6bbcae2228fd44 a1e980d7a9e7ee6faf4f5fd7b450413b969af26d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0fb0b02bd6fd26cba38002be4a6bbcae2228fd44 e0eb87677c76b157cdf8eb7c1f19e56227165a33 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0fb0b02bd6fd26cba38002be4a6bbcae2228fd44 06734dfeaeba886aab1bf147249195b888ac3e4d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0fb0b02bd6fd26cba38002be4a6bbcae2228fd44 c23c409228629107203d3c3e95fff1473173f1a6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0fb0b02bd6fd26cba38002be4a6bbcae2228fd44 10cb31b2b74cb664c6c95cf72364d7d5c483ab82 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0fb0b02bd6fd26cba38002be4a6bbcae2228fd44 bfc336a9fbbf09805f3dfe25c195a4db90af2846 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0fb0b02bd6fd26cba38002be4a6bbcae2228fd44 976245094925bab9bc39366b2e9ab44ffcde61d0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.8","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.8 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.265 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.216 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.183 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.152 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.104 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.45 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.9 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/smc/smc_llc.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"e384f3cba6ea709f5b2272b1770db4ce14047f78","status":"affected","version":"0fb0b02bd6fd26cba38002be4a6bbcae2228fd44","versionType":"git"},{"lessThan":"a1e980d7a9e7ee6faf4f5fd7b450413b969af26d","status":"affected","version":"0fb0b02bd6fd26cba38002be4a6bbcae2228fd44","versionType":"git"},{"lessThan":"e0eb87677c76b157cdf8eb7c1f19e56227165a33","status":"affected","version":"0fb0b02bd6fd26cba38002be4a6bbcae2228fd44","versionType":"git"},{"lessThan":"06734dfeaeba886aab1bf147249195b888ac3e4d","status":"affected","version":"0fb0b02bd6fd26cba38002be4a6bbcae2228fd44","versionType":"git"},{"lessThan":"c23c409228629107203d3c3e95fff1473173f1a6","status":"affected","version":"0fb0b02bd6fd26cba38002be4a6bbcae2228fd44","versionType":"git"},{"lessThan":"10cb31b2b74cb664c6c95cf72364d7d5c483ab82","status":"affected","version":"0fb0b02bd6fd26cba38002be4a6bbcae2228fd44","versionType":"git"},{"lessThan":"bfc336a9fbbf09805f3dfe25c195a4db90af2846","status":"affected","version":"0fb0b02bd6fd26cba38002be4a6bbcae2228fd44","versionType":"git"},{"lessThan":"976245094925bab9bc39366b2e9ab44ffcde61d0","status":"affected","version":"0fb0b02bd6fd26cba38002be4a6bbcae2228fd44","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/smc/smc_llc.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.8"},{"lessThan":"5.8","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.265","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.216","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.183","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.152","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.104","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.45","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.265","versionStartIncluding":"5.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.216","versionStartIncluding":"5.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.183","versionStartIncluding":"5.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.152","versionStartIncluding":"5.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.104","versionStartIncluding":"5.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.45","versionStartIncluding":"5.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.9","versionStartIncluding":"5.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"5.8","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: fix qentry overwrite for CONFIRM_LINK and ADD_LINK_CONT in smc_llc_event_handler()\n\nThe SMC_LLC_CONFIRM_LINK / SMC_LLC_ADD_LINK_CONT branch in\nsmc_llc_event_handler() stores an incoming qentry into the local LLC flow\nwithout first checking whether a qentry is already pending. If a malicious or\nbuggy peer sends a second CONFIRM_LINK or ADD_LINK_CONT request while a flow is\nactive and flow->qentry is already set, smc_llc_flow_qentry_set() overwrites the\npointer without freeing the previous allocation, leaking one kmalloc-96 object\nper spurious message.\n\nThe sibling SMC_LLC_DELETE_LINK branch already has the correct !flow->qentry\nguard. Apply the same guard to the CONFIRM_LINK/ADD_LINK_CONT branch so that a\nduplicate message when qentry is already occupied falls through to break and is\nfreed by the kfree(qentry) at the out: label, rather than silently leaking the\nexisting allocation.\n\nThe response direction (smc_llc_rx_response()) is unaffected: it already guards\nwith flow->qentry at the equivalent site and drops duplicate responses\ncorrectly."}],"providerMetadata":{"dateUpdated":"2026-08-22T15:33:12.716Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/e384f3cba6ea709f5b2272b1770db4ce14047f78"},{"url":"https://git.kernel.org/stable/c/a1e980d7a9e7ee6faf4f5fd7b450413b969af26d"},{"url":"https://git.kernel.org/stable/c/e0eb87677c76b157cdf8eb7c1f19e56227165a33"},{"url":"https://git.kernel.org/stable/c/06734dfeaeba886aab1bf147249195b888ac3e4d"},{"url":"https://git.kernel.org/stable/c/c23c409228629107203d3c3e95fff1473173f1a6"},{"url":"https://git.kernel.org/stable/c/10cb31b2b74cb664c6c95cf72364d7d5c483ab82"},{"url":"https://git.kernel.org/stable/c/bfc336a9fbbf09805f3dfe25c195a4db90af2846"},{"url":"https://git.kernel.org/stable/c/976245094925bab9bc39366b2e9ab44ffcde61d0"}],"title":"net/smc: fix qentry overwrite for CONFIRM_LINK and ADD_LINK_CONT in smc_llc_event_handler()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74719","datePublished":"2026-08-22T15:33:12.716Z","dateReserved":"2026-08-15T05:44:03.929Z","dateUpdated":"2026-08-22T15:33:12.716Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-22 16:16:46","lastModifiedDate":"2026-08-22 16:16:46","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74719","Ordinal":"1","Title":"net/smc: fix qentry overwrite for CONFIRM_LINK and ADD_LINK_CONT","CVE":"CVE-2026-74719","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74719","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: fix qentry overwrite for CONFIRM_LINK and ADD_LINK_CONT in smc_llc_event_handler()\n\nThe SMC_LLC_CONFIRM_LINK / SMC_LLC_ADD_LINK_CONT branch in\nsmc_llc_event_handler() stores an incoming qentry into the local LLC flow\nwithout first checking whether a qentry is already pending. If a malicious or\nbuggy peer sends a second CONFIRM_LINK or ADD_LINK_CONT request while a flow is\nactive and flow->qentry is already set, smc_llc_flow_qentry_set() overwrites the\npointer without freeing the previous allocation, leaking one kmalloc-96 object\nper spurious message.\n\nThe sibling SMC_LLC_DELETE_LINK branch already has the correct !flow->qentry\nguard. Apply the same guard to the CONFIRM_LINK/ADD_LINK_CONT branch so that a\nduplicate message when qentry is already occupied falls through to break and is\nfreed by the kfree(qentry) at the out: label, rather than silently leaking the\nexisting allocation.\n\nThe response direction (smc_llc_rx_response()) is unaffected: it already guards\nwith flow->qentry at the equivalent site and drops duplicate responses\ncorrectly.","Type":"Description","Title":"net/smc: fix qentry overwrite for CONFIRM_LINK and ADD_LINK_CONT"}]}}}