CVE-2021-47087tee: optee: Fix incorrect page free bug
- 7.8HighCVSS base score
- 0.24%Exploitation in 30 daysEPSS · top 85% 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: tee: optee: Fix incorrect page free bug Pointer to the allocated pages (struct page *page) has already progressed towards the end of allocation. It is incorrect to perform __free_pages(page, order) using this pointer as we would free any arbitrary pages. Fix this by stop modifying the page pointer.
Timeline
ID reserved
By Linux
- 4 days later
· 4 days later
Published
- 2 years later
· 2 years 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 |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.24% · top 85% of all CVEs (13 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: High 7.8.
Affected products
- affected 3c712f14d8a9354a8807c15c64c8dd334499cc42 – < 806142c805cacd098e61bdc0f72c778a2389fe4a
- affected 1340dc3fb75ea69221f4f5dcb0cbace55ad0331c – < ad338d825e3f7b96ee542bf313728af2d19fe9ad
- affected ec185dd3ab257dc2a60953fdf1b6622f524cc5b7 – < 91e94e42f6fc49635f1a16d8ae3f79552bcfda29
- affected ec185dd3ab257dc2a60953fdf1b6622f524cc5b7 – < 18549bf4b21c739a9def39f27dcac53e27286ab5
- affected 255e17923b22cb7abd026e044416d61f6bd0eec0
- affected 5.4.140 – < 5.4.169
- affected 5.10.58 – < 5.10.89
- affected 5.13.10 – < 5.14
- affected 5.14
- unaffected < 5.14
- unaffected 5.4.169 – ≤ 5.4.*
- unaffected 5.10.89 – ≤ 5.10.*
- unaffected 5.15.12 – ≤ 5.15.*
- unaffected 5.16 – ≤ *
References
References4
- https://git.kernel.org/stable/c/806142c805cacd098e61bdc0f72c778a2389fe4a (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/ad338d825e3f7b96ee542bf313728af2d19fe9ad (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/91e94e42f6fc49635f1a16d8ae3f79552bcfda29 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/18549bf4b21c739a9def39f27dcac53e27286ab5 (opens in a new tab)x_transferred
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-2021-33735 (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-2021-47087)Record last updated .