CVE-2026-89552: Linux vulnerability

CVE-2026-89552: params: fix charp corruption on allocation failure

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.

UnknownCVSS not scoredNot KEV-listedUpdatedOct 21, 2026, 12:47 UTC (UTC+00:00)

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cve · low confidence lookup

CVE-2026-89552 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup

Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Sep 11, 2026, 19:44 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

3Timeline events

0ADP providers

6Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
Sep 11, 2026, 19:38 UTC (UTC+00:00)
CVE publishedCVE Program
The CVE record was published.
Sep 11, 2026, 19:44 UTC (UTC+00:00)
CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
Oct 21, 2026, 12:47 UTC (UTC+00:00)

Source materials

CVE List V5 sourceCVE List V5
https://git.kernel.org/stable/c/31b41ea8383d51992d6b0dfe3a99da1dec8ce1c1CVE reference, Linux
https://git.kernel.org/stable/c/614f873268c5b172804c9af6639bd17b7e1e2359CVE reference, Linux
https://git.kernel.org/stable/c/704ecd010d4a9b33160e40b74eb402f6b86a18e0CVE reference, Linux
https://git.kernel.org/stable/c/0d8e2404925a0607ffec79a53170715a46936896CVE reference, Linux
https://git.kernel.org/stable/c/3dfaae04243cde460d82dfc2a7dd0bb6664d20aeCVE reference, Linux

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

LinuxLinuxe180a6b7759a99a28cbcce3547c4c80822cb6c2a, e180a6b7759a99a28cbcce3547c4c80822cb6c2a, e180a6b7759a99a28cbcce3547c4c80822cb6c2a, e180a6b7759a99a28cbcce3547c4c80822cb6c2a, e180a6b7759a99a28cbcce3547c4c80822cb6c2aunaffected

LinuxLinux2.6.30, 0, 6.6.160, 6.12.109, 6.18.50, 7.2.4, 7.3affected

Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.