{"cve":"CVE-2026-89552","nvd":{"published":"2026-09-11T20:19:38.760","modified":"2026-10-21T13:20:08.360","status":"Received","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.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/0d8e2404925a0607ffec79a53170715a46936896","https://git.kernel.org/stable/c/31b41ea8383d51992d6b0dfe3a99da1dec8ce1c1","https://git.kernel.org/stable/c/3dfaae04243cde460d82dfc2a7dd0bb6664d20ae","https://git.kernel.org/stable/c/614f873268c5b172804c9af6639bd17b7e1e2359","https://git.kernel.org/stable/c/704ecd010d4a9b33160e40b74eb402f6b86a18e0"],"products":[],"source":"nvd","synced_at":"2026-10-22T16:41:11.231219466+00:00"},"epss":{"cve":"CVE-2026-89552","score":0.00168,"percentile":0.06149,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}