CVE-2026-89552

CVE CVE-2026-89552EUVD EUVD-2026-76463Published 2026-09-11T19:44:26.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: params: fix charp corruption on allocation failure param_set_charp() stores charp parameters in allocated memory after slab is available, and releases the previous value when the parameter is updated. The previous value is released before the replacement allocation succeeds. If kmalloc_parameter() fails, the setter returns -ENOMEM with the parameter left as NULL. Failing zswap's compressor update before zswap is initialized can later trigger: BUG: kernel NULL pointer dereference, address: 0000000000000000 RIP: 0010:strcmp+0x10/0x30 Call Trace: zswap_setup+0x3b1/0x490 zswap_enabled_param_set+0x5b/0xa0 param_attr_store+0x93/0xe0 module_attr_store+0x1c/0x30 kernfs_fop_write_iter+0x116/0x1f0 Allocate and copy the replacement first, then replace the parameter value only after allocation succeeds.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux 2.6.30; e180a6b7759a99a28cbcce3547c4c80822cb6c2a <704ecd010d4a9b33160e40b74eb402f6b86a18e0; patch: 7.2.4; e180a6b7759a99a28cbcce3547c4c80822cb6c2a <0d8e2404925a0607ffec79a53170715a46936896; patch: 6.18.50; e180a6b7759a99a28cbcce3547c4c80822cb6c2a <3dfaae04243cde460d82dfc2a7dd0bb6664d20ae; patch: 7.3-rc1; e180a6b7759a99a28cbcce3547c4c80822cb6c2a <614f873268c5b172804c9af6639bd17b7e1e2359; patch: 0; patch: 6.12.109

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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