tee: amdtee: fix use-after-free vulnerability in amdtee_close_session
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-416 and the CVSS impact.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 5.6 and later | 5.10.199, 5.15.136, 6.1.59, 6.5.8, 6.6 | Patch available | CNA |
- Linux VendorLinux Affected 5.6 and later Fixed in 5.10.199, 5.15.136, 6.1.59, 6.5.8, 6.6 Patch available CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.6 to before 5.10.199; 5.11 to before 5.15.136; 5.16 to before 6.1.59; 6.2 to before 6.5.8 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.6:rc1:*:*:*:*:*:* | 6.6 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.6:rc2:*:*:*:*:*:* | 6.6 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.6:rc3:*:*:*:*:*:* | 6.6 rc3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.6:rc4:*:*:*:*:*:* | 6.6 rc4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.6:rc5:*:*:*:*:*:* | 6.6 rc5 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.6 to before 5.10.199; 5.11 to before 5.15.136; 5.16 to before 6.1.59; 6.2 to before 6.5.8 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.6:rc1:*:*:*:*:*:* Versions 6.6 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.6:rc2:*:*:*:*:*:* Versions 6.6 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.6:rc3:*:*:*:*:*:* Versions 6.6 rc3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.6:rc4:*:*:*:*:*:* Versions 6.6 rc4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.6:rc5:*:*:*:*:*:* Versions 6.6 rc5 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.199, 5.15.136, 6.1.59, 6.5.8, 6.6
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
Not affected: 4 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2023-52503
- 2026-10-03 Alias added: GHSA-c5gm-r7c3-j9cp
References
Patch 5
- https://git.kernel.org/stable/c/da7ce52a2f6c468946195b116615297d3d113a27
- https://git.kernel.org/stable/c/1680c82929bc14d706065f123dab77f2f1293116
- https://git.kernel.org/stable/c/60c3e7a00db954947c265b55099c21b216f2a05c
- https://git.kernel.org/stable/c/1c95574350cd63bc3c5c2fa06658010768f2a0ce
- https://git.kernel.org/stable/c/f4384b3e54ea813868bb81a861bf5b2406e15d8f
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- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2023-52503 · CVE Program
- CVE-2023-52503 · NVD
- FIRST EPSS
- GHSA-c5gm-r7c3-j9cp · GitHub Advisory Database · CC BY 4.0
- CVE-2023-52503 · Red Hat security data · CC BY 4.0
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