Answer in brief
CVE-2026-89552 records a Unknown severity vulnerability in params: fix charp corruption on allocation failure. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=e180a6b7759a99a28cbcce3547c4c80822cb6c2a <614f873268c5b172804c9af6639bd17b7e1e2359 || >=e180a6b7759a99a28cbcce3547c4c80822cb6c2a <704ecd010d4a9b33160e40b74eb402f6b86a18e0 || >=e180a6b7759a99a28cbcce3547c4c80822cb6c2a <0d8e2404925a0607ffec79a53170715a46936896 || >=e180a6b7759a99a28cbcce3547c4c80822cb6c2a <3dfaae04243cde460d82dfc2a7dd0bb6664d20ae | 614f873268c5b172804c9af6639bd17b7e1e2359, 704ecd010d4a9b33160e40b74eb402f6b86a18e0, 0d8e2404925a0607ffec79a53170715a46936896, 3dfaae04243cde460d82dfc2a7dd0bb6664d20ae |
| Linux/Linuxgeneric | 2.6.30 | Not reported |
| Linux/Linuxgeneric | >=e180a6b7759a99a28cbcce3547c4c80822cb6c2a <31b41ea8383d51992d6b0dfe3a99da1dec8ce1c1 || >=e180a6b7759a99a28cbcce3547c4c80822cb6c2a <614f873268c5b172804c9af6639bd17b7e1e2359 || >=e180a6b7759a99a28cbcce3547c4c80822cb6c2a <704ecd010d4a9b33160e40b74eb402f6b86a18e0 || >=e180a6b7759a99a28cbcce3547c4c80822cb6c2a <0d8e2404925a0607ffec79a53170715a46936896 || >=e180a6b7759a99a28cbcce3547c4c80822cb6c2a <3dfaae04243cde460d82dfc2a7dd0bb6664d20ae | 31b41ea8383d51992d6b0dfe3a99da1dec8ce1c1, 614f873268c5b172804c9af6639bd17b7e1e2359, 704ecd010d4a9b33160e40b74eb402f6b86a18e0, 0d8e2404925a0607ffec79a53170715a46936896, 3dfaae04243cde460d82dfc2a7dd0bb6664d20ae |
Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 11, 2026
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.
Quoted source text, attributed separately from HOL analysis.