Linux Kernel up to 6.12.102/6.18.43/7.1.5 amdgpu amdgpu_ctx_init use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.4$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as very critical, has been found in Linux Kernel up to 6.12.102/6.18.43/7.1.5. Affected is the function amdgpu_ctx_init of the component amdgpu. This manipulation causes use after free. This vulnerability is handled as CVE-2026-68273. It is possible to launch the attack on the local host. There is not any exploit available.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.12.102/6.18.43/7.1.5 and classified as very critical. Affected by this vulnerability is the function amdgpu_ctx_init of the component amdgpu. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Fix context pstate override handling There are several problems in the context pstate handling code. The most serious ones are potential use-after-free and NULL pointer dereferences at context initialization time. Both are due amdgpu_ctx_init() not holding the adev->pm.stable_pstate_ctx_lock, which is otherwise used from both sysfs and the context code itself for modifying and clearing the stored context pointer. Second issue is that context fini can trample over the pstate configuration set via sysfs. This is due the restore state (ctx->stable_pstate) being saved at context init time, and not if, or when the context actually changes the pstate. As the context exits it will therefore incorrectly restore to what was set before the sysfs override was requested. The simplest fix is to drastically simplify how the state is tracked, by clearly defining the points at which pstate ownership is taken and released, and to handle all transitions under the correct lock. Instead of at context init time, the previous state is saved only at the point the context overrides the current state, and is restored on context exit only if the context is still the owner of the current override state. (cherry picked from commit 1b5e413713c0a93bc1818394d0ce49aaad21bd27)

The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2026-68273 since 07/30/2026. The exploitation appears to be easy. An attack has to be approached locally. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/10/2026).

Upgrading to version 6.12.103, 6.18.44, 7.1.6 or 7.2-rc1 eliminates this vulnerability. Applying the patch 23a8726e1d7597fe7c9a59d5dc42ba8b7d345b8a/e06c39cc1c48dca68a5ffd971c23025a52d46634/9f9c88eb298c54348be3ca4087f4f4c615065b87/c1dc4ccb82c9e56325d8e7514ca4c90bd1efb351 is able to eliminate this problem.

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Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.4

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.12.103/6.18.44/7.1.6/7.2-rc1
Patch: 23a8726e1d7597fe7c9a59d5dc42ba8b7d345b8a/e06c39cc1c48dca68a5ffd971c23025a52d46634/9f9c88eb298c54348be3ca4087f4f4c615065b87/c1dc4ccb82c9e56325d8e7514ca4c90bd1efb351

Timelineinfo

07/30/2026 CVE reserved
08/10/2026 +11 days Advisory disclosed
08/10/2026 +0 days VulDB entry created
08/10/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-68273 (🔒)
GCVE (CVE): GCVE-0-2026-68273
GCVE (VulDB): GCVE-100-387661

Entryinfo

Created: 08/10/2026 17:18
Changes: 08/10/2026 17:18 (59)
Complete: 🔍
Cache ID: 216::103

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