CVE-2026-64182drivers/base/memory: fix memory block reference leak in poison accounting
- 5.5MediumCVSS base score
- 0.11%Exploitation in 30 daysEPSS · top 98% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
Published
- 4 months later
· 4 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.11% · top 98% of all CVEs (15 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 5033091de814ab4b5623faed2755f3064e19e2d2 – < 686b4283f82cd630fafd7ca9b03dfc080b3ec8fa
- affected 5033091de814ab4b5623faed2755f3064e19e2d2 – < ce60d9452a0f2effa72fd20ea270c59ca691d455
- affected 5033091de814ab4b5623faed2755f3064e19e2d2 – < 24840b3139d7415144b81e4f9f4c44670d15bed9
- affected 5033091de814ab4b5623faed2755f3064e19e2d2 – < 8502e2c2d0633f99d94d22ae8dabc10caae1fc2a
- affected 5033091de814ab4b5623faed2755f3064e19e2d2 – < 03a2cc1756a0570f887d624cd6c535ea0cbd4951
- affected 6.2
- unaffected < 6.2
- unaffected 6.6.142 – ≤ 6.6.*
- unaffected 6.12.92 – ≤ 6.12.*
- unaffected 6.18.34 – ≤ 6.18.*
- unaffected 7.0.11 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References5
- https://git.kernel.org/stable/c/686b4283f82cd630fafd7ca9b03dfc080b3ec8fa (opens in a new tab)
- https://git.kernel.org/stable/c/ce60d9452a0f2effa72fd20ea270c59ca691d455 (opens in a new tab)
- https://git.kernel.org/stable/c/24840b3139d7415144b81e4f9f4c44670d15bed9 (opens in a new tab)
- https://git.kernel.org/stable/c/8502e2c2d0633f99d94d22ae8dabc10caae1fc2a (opens in a new tab)
- https://git.kernel.org/stable/c/03a2cc1756a0570f887d624cd6c535ea0cbd4951 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-45867 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-64182)Record last updated .