Linux Kernel up to 7.3-rc3 amdgpu drm/amdgpu nbio_v7_9_handle_ras_controller_intr_no_bifring ras/obj null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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6.2$0-$5k0.00-

Summaryinfo

A vulnerability described as critical has been identified in Linux Kernel up to 6.6.157/6.12.111/6.18.53/7.2.7/7.3-rc3. The impacted element is the function nbio_v7_9_handle_ras_controller_intr_no_bifring of the file drm/amdgpu of the component amdgpu. Such manipulation of the argument ras/obj leads to null pointer dereference. This vulnerability is documented as CVE-2026-98270. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.6.157/6.12.111/6.18.53/7.2.7/7.3-rc3. Affected by this issue is the function nbio_v7_9_handle_ras_controller_intr_no_bifring of the file drm/amdgpu of the component amdgpu. The manipulation of the argument ras/obj with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: check ras and obj before dereference nbio_v7_9_handle_ras_controller_intr_no_bifring() dereferences ras and obj without checking either for NULL. Both amdgpu_ras_get_context() and amdgpu_ras_find_obj() can return NULL, e.g. during the window between adev->nbio.ras being set (early in amdgpu_ras_init(), by design, to enable the fatal-error interrupt as soon as possible) and the PCIE_BIF ras object actually being created in RAS late_init. Any interrupt in that window crashes in hard-IRQ context. This is analogous to commit d190b459b2a4 ("drm/amdgpu: the warning dereferencing obj for nbio_v7_4"), which fixed the same issue in the nbio_v7_4 handler. Found by Linux Verification Center (linuxtesting.org) with SVACE. (cherry picked from commit c7071767a50a32ed727cf800ac84372429e3b4b3)

The advisory is available at git.kernel.org. This vulnerability is handled as CVE-2026-98270 since 09/25/2026. The exploitation is known to be easy. The attack may be launched remotely. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 10/06/2026).

Upgrading to version 6.6.158, 6.12.112, 6.18.54, 7.2.8 or 7.3-rc4 eliminates this vulnerability. Applying the patch b7c7f07a40037514f8e890aa00f8d7b196d680cf/fc5f845a291fc8175e6857cd6ad042818da192e8/37583946d8751f8e285c467d770ac0b609b82a23/315c22712715491f0dfafdaf2c2b437540e68702/723d4dc628d764b19cf9efca14b82cca5ff020c9 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

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 6.6.158/6.12.112/6.18.54/7.2.8/7.3-rc4
Patch: b7c7f07a40037514f8e890aa00f8d7b196d680cf/fc5f845a291fc8175e6857cd6ad042818da192e8/37583946d8751f8e285c467d770ac0b609b82a23/315c22712715491f0dfafdaf2c2b437540e68702/723d4dc628d764b19cf9efca14b82cca5ff020c9

Timelineinfo

09/25/2026 CVE reserved
10/06/2026 +11 days Advisory disclosed
10/06/2026 +0 days VulDB entry created
10/06/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-98270 (🔒)
GCVE (CVE): GCVE-0-2026-98270
GCVE (VulDB): GCVE-100-414146

Entryinfo

Created: 10/06/2026 13:10
Changes: 10/06/2026 13:10 (61)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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