CVE-2023-52503
tee: amdtee: fix use-after-free vulnerability in amdtee_close_session
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: tee: amdtee: fix use-after-free vulnerability in amdtee_close_session There is a potential race condition in amdtee_close_session that may cause use-after-free in amdtee_open_session. For instance, if a session has refcount == 1, and one thread tries to free this session via: kref_put(&sess->refcount, destroy_session); the reference count will get decremented, and the next step would be to call destroy_session(). However, if in another thread, amdtee_open_session() is called before destroy_session() has completed execution, alloc_session() may return 'sess' that will be freed up later in destroy_session() leading to use-after-free in amdtee_open_session. To fix this issue, treat decrement of sess->refcount and removal of 'sess' from session list in destroy_session() as a critical section, so that it is executed atomically.
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 | High7.0 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.26% · top 82% of all CVEs (6 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.
Weakness
Affected products
- affected 757cc3e9ff1d72d014096399d6e2bf03974d9da1 – < da7ce52a2f6c468946195b116615297d3d113a27
- affected 757cc3e9ff1d72d014096399d6e2bf03974d9da1 – < 1680c82929bc14d706065f123dab77f2f1293116
- affected 757cc3e9ff1d72d014096399d6e2bf03974d9da1 – < 60c3e7a00db954947c265b55099c21b216f2a05c
- affected 757cc3e9ff1d72d014096399d6e2bf03974d9da1 – < 1c95574350cd63bc3c5c2fa06658010768f2a0ce
- affected 757cc3e9ff1d72d014096399d6e2bf03974d9da1 – < f4384b3e54ea813868bb81a861bf5b2406e15d8f
- affected 5.6
- unaffected < 5.6
- unaffected 5.10.199 – ≤ 5.10.*
- unaffected 5.15.136 – ≤ 5.15.*
- unaffected 6.1.59 – ≤ 6.1.*
- unaffected 6.5.8 – ≤ 6.5.*
- unaffected 6.6 – ≤ *
References (5)
- https://git.kernel.org/stable/c/da7ce52a2f6c468946195b116615297d3d113a27 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/1680c82929bc14d706065f123dab77f2f1293116 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/60c3e7a00db954947c265b55099c21b216f2a05c (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/1c95574350cd63bc3c5c2fa06658010768f2a0ce (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/f4384b3e54ea813868bb81a861bf5b2406e15d8f (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)
- 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://trackcve.app/cve/CVE-2023-52503)Record last updated .