Medium 5.5Published Jul 19, 2026

CVE-2026-64182drivers/base/memory: fix memory block reference leak in poison accounting

Updated under an hour ago (Oct 27, 2026, 1:10 AM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: drivers/base/memory: fix memory block reference leak in poison accounting memblk_nr_poison_inc() and memblk_nr_poison_sub() look up a memory block via find_memory_block_by_id(), which acquires a reference to the memory block device. Both helpers use the returned memory block without dropping that reference, leaking the device reference on each successful lookup. Drop the reference after updating nr_hwpoison.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: Jul 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	5033091de814ab4b5623faed2755f3064e19e2d2 builds before 686b4283f82cd630fafd7ca9b03dfc080b3ec8fa; from 5033091de814ab4b5623faed2755f3064e19e2d2 before ce60d9452a0f2effa72fd20ea270c59ca691d455; 5033091de814ab4b5623faed2755f3064e19e2d2 builds before 24840b3139d7415144b81e4f9f4c44670d15bed9; 5033091de814ab4b5623faed2755f3064e19e2d2 builds before 8502e2c2d0633f99d94d22ae8dabc10caae1fc2a; 5033091de814ab4b5623faed2755f3064e19e2d2 builds before 03a2cc1756a0570f887d624cd6c535ea0cbd4951	CNA record
linux linux_kernel linux:linux_kernel	from 6.2 before 6.6.142; from 6.7 before 6.12.92; from 6.13 before 6.18.34; from 6.19 before 7.0.11; 7.1; 7.1; 7.1; 7.1	NVD

References

References

https://git.kernel.org/stable/c/686b4283f82cd630fafd7ca9b03dfc080b3ec8fa	patch
https://git.kernel.org/stable/c/ce60d9452a0f2effa72fd20ea270c59ca691d455	patch
https://git.kernel.org/stable/c/24840b3139d7415144b81e4f9f4c44670d15bed9	patch
https://git.kernel.org/stable/c/8502e2c2d0633f99d94d22ae8dabc10caae1fc2a	patch
https://git.kernel.org/stable/c/03a2cc1756a0570f887d624cd6c535ea0cbd4951	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.