Known exploited vulnerability
CVE-2021-29256
The short answer
CVE-2021-29256 affects n/a n/a and is rated high (CVSS 8.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2023-07-07: attackers are using it, so patch it first.
What it is
. The Arm Mali GPU kernel driver allows an unprivileged user to achieve access to freed memory, leading to information disclosure or root privilege escalation. This affects Bifrost r16p0 through r29p0 before r30p0, Valhall r19p0 through r29p0 before r30p0, and Midgard r28p0 through r30p0.
Weakness: CWE-416.
Severity
8.8 high
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploited (CISA KEV)
Yes, since Jul 7, 2023
Federal due date Jul 28, 2023
EPSS, next 30 days
3.0%
Higher than 87% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
What CISA says to do
Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.
Affected products
n/a. NVD's record lists the exact affected versions.
References
- developer.arm.com/support/arm-security-updates/mali-gpu-kernel-driver Vendor Advisory
- developer.arm.com/support/arm-security-updates/mali-gpu-kernel-driver Vendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-29256 US Government Resource
Questions
Is CVE-2021-29256 being exploited?
Yes. CISA added CVE-2021-29256 to its Known Exploited Vulnerabilities catalog on 2023-07-07, with a federal remediation due date of 2023-07-28.
How do I fix CVE-2021-29256?
CISA's required action: Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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