{"api_version":"1","generated_at":"2026-09-16T08:50:32+00:00","cve":"CVE-2026-89552","urls":{"html":"https://cve.report/CVE-2026-89552","api":"https://cve.report/api/cve/CVE-2026-89552.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-89552","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-89552"},"summary":{"title":"params: fix charp corruption on allocation failure","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nparams: fix charp corruption on allocation failure\n\nparam_set_charp() stores charp parameters in allocated memory after slab is\navailable, and releases the previous value when the parameter is updated.\n\nThe previous value is released before the replacement allocation succeeds.\nIf kmalloc_parameter() fails, the setter returns -ENOMEM with the parameter\nleft as NULL.\n\nFailing zswap's compressor update before zswap is initialized can later\ntrigger:\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000000\n  RIP: 0010:strcmp+0x10/0x30\n  Call Trace:\n    zswap_setup+0x3b1/0x490\n    zswap_enabled_param_set+0x5b/0xa0\n    param_attr_store+0x93/0xe0\n    module_attr_store+0x1c/0x30\n    kernfs_fop_write_iter+0x116/0x1f0\n\nAllocate and copy the replacement first, then replace the parameter value\nonly after allocation succeeds.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-11 20:19:38","updated_at":"2026-09-11 20:19:38"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/0d8e2404925a0607ffec79a53170715a46936896","name":"https://git.kernel.org/stable/c/0d8e2404925a0607ffec79a53170715a46936896","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3dfaae04243cde460d82dfc2a7dd0bb6664d20ae","name":"https://git.kernel.org/stable/c/3dfaae04243cde460d82dfc2a7dd0bb6664d20ae","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/704ecd010d4a9b33160e40b74eb402f6b86a18e0","name":"https://git.kernel.org/stable/c/704ecd010d4a9b33160e40b74eb402f6b86a18e0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/614f873268c5b172804c9af6639bd17b7e1e2359","name":"https://git.kernel.org/stable/c/614f873268c5b172804c9af6639bd17b7e1e2359","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89552","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89552","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e180a6b7759a99a28cbcce3547c4c80822cb6c2a 614f873268c5b172804c9af6639bd17b7e1e2359 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e180a6b7759a99a28cbcce3547c4c80822cb6c2a 704ecd010d4a9b33160e40b74eb402f6b86a18e0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e180a6b7759a99a28cbcce3547c4c80822cb6c2a 0d8e2404925a0607ffec79a53170715a46936896 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e180a6b7759a99a28cbcce3547c4c80822cb6c2a 3dfaae04243cde460d82dfc2a7dd0bb6664d20ae git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2.6.30","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 2.6.30 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.109 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.50 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.4 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"89552","cve":"CVE-2026-89552","epss":"0.001680000","percentile":"0.063580000","score_date":"2026-09-14","updated_at":"2026-09-15 00:00:43"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["kernel/params.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"614f873268c5b172804c9af6639bd17b7e1e2359","status":"affected","version":"e180a6b7759a99a28cbcce3547c4c80822cb6c2a","versionType":"git"},{"lessThan":"704ecd010d4a9b33160e40b74eb402f6b86a18e0","status":"affected","version":"e180a6b7759a99a28cbcce3547c4c80822cb6c2a","versionType":"git"},{"lessThan":"0d8e2404925a0607ffec79a53170715a46936896","status":"affected","version":"e180a6b7759a99a28cbcce3547c4c80822cb6c2a","versionType":"git"},{"lessThan":"3dfaae04243cde460d82dfc2a7dd0bb6664d20ae","status":"affected","version":"e180a6b7759a99a28cbcce3547c4c80822cb6c2a","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["kernel/params.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.30"},{"lessThan":"2.6.30","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.109","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.50","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.109","versionStartIncluding":"2.6.30","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.50","versionStartIncluding":"2.6.30","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.4","versionStartIncluding":"2.6.30","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"2.6.30","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nparams: fix charp corruption on allocation failure\n\nparam_set_charp() stores charp parameters in allocated memory after slab is\navailable, and releases the previous value when the parameter is updated.\n\nThe previous value is released before the replacement allocation succeeds.\nIf kmalloc_parameter() fails, the setter returns -ENOMEM with the parameter\nleft as NULL.\n\nFailing zswap's compressor update before zswap is initialized can later\ntrigger:\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000000\n  RIP: 0010:strcmp+0x10/0x30\n  Call Trace:\n    zswap_setup+0x3b1/0x490\n    zswap_enabled_param_set+0x5b/0xa0\n    param_attr_store+0x93/0xe0\n    module_attr_store+0x1c/0x30\n    kernfs_fop_write_iter+0x116/0x1f0\n\nAllocate and copy the replacement first, then replace the parameter value\nonly after allocation succeeds."}],"providerMetadata":{"dateUpdated":"2026-09-11T19:44:26.091Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/614f873268c5b172804c9af6639bd17b7e1e2359"},{"url":"https://git.kernel.org/stable/c/704ecd010d4a9b33160e40b74eb402f6b86a18e0"},{"url":"https://git.kernel.org/stable/c/0d8e2404925a0607ffec79a53170715a46936896"},{"url":"https://git.kernel.org/stable/c/3dfaae04243cde460d82dfc2a7dd0bb6664d20ae"}],"title":"params: fix charp corruption on allocation failure","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-89552","datePublished":"2026-09-11T19:44:26.091Z","dateReserved":"2026-09-11T19:38:34.723Z","dateUpdated":"2026-09-11T19:44:26.091Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-11 20:19:38","lastModifiedDate":"2026-09-11 20:19:38","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"89552","Ordinal":"1","Title":"params: fix charp corruption on allocation failure","CVE":"CVE-2026-89552","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"89552","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nparams: fix charp corruption on allocation failure\n\nparam_set_charp() stores charp parameters in allocated memory after slab is\navailable, and releases the previous value when the parameter is updated.\n\nThe previous value is released before the replacement allocation succeeds.\nIf kmalloc_parameter() fails, the setter returns -ENOMEM with the parameter\nleft as NULL.\n\nFailing zswap's compressor update before zswap is initialized can later\ntrigger:\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000000\n  RIP: 0010:strcmp+0x10/0x30\n  Call Trace:\n    zswap_setup+0x3b1/0x490\n    zswap_enabled_param_set+0x5b/0xa0\n    param_attr_store+0x93/0xe0\n    module_attr_store+0x1c/0x30\n    kernfs_fop_write_iter+0x116/0x1f0\n\nAllocate and copy the replacement first, then replace the parameter value\nonly after allocation succeeds.","Type":"Description","Title":"params: fix charp corruption on allocation failure"}]}}}