Answer in brief
CVE-2026-64182 records a Medium severity (CVSS 5.5) vulnerability in drivers/base/memory: fix memory block reference leak in poison accounting. The current sources do not mark it as known exploited. The current feed maps 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.
CVSS is 5.5. 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). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=5033091de814ab4b5623faed2755f3064e19e2d2 <686b4283f82cd630fafd7ca9b03dfc080b3ec8fa || >=5033091de814ab4b5623faed2755f3064e19e2d2 <ce60d9452a0f2effa72fd20ea270c59ca691d455 || >=5033091de814ab4b5623faed2755f3064e19e2d2 <24840b3139d7415144b81e4f9f4c44670d15bed9 || >=5033091de814ab4b5623faed2755f3064e19e2d2 <8502e2c2d0633f99d94d22ae8dabc10caae1fc2a || >=5033091de814ab4b5623faed2755f3064e19e2d2 <03a2cc1756a0570f887d624cd6c535ea0cbd4951 | 686b4283f82cd630fafd7ca9b03dfc080b3ec8fa, ce60d9452a0f2effa72fd20ea270c59ca691d455, 24840b3139d7415144b81e4f9f4c44670d15bed9, 8502e2c2d0633f99d94d22ae8dabc10caae1fc2a, 03a2cc1756a0570f887d624cd6c535ea0cbd4951 |
| Linux/Linuxgeneric | 6.2 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 12, 2026
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.
Quoted source text, attributed separately from HOL analysis.