Unknown

CVE-2026-99208 — drm/xe/oa: Zero OA buffer at allocation

In the Linux kernel, the following vulnerability has been resolved: drm/xe/oa: Zero OA buffer at allocation ttm_bo_type_kernel BOs are not guaranteed to be zeroed on allocation and may contain data from previously freed pages. Since the OA buffer is mmap'able by userspace, this can expose stale kernel memory contents. Streams opened with DRM_XE_OA_PROPERTY_OA_DISABLED allocate the OA buffer without calling xe_oa_init_oa_buffer(). Zero the buffer at allocation to prevent information disclosure through mmap. The existing zeroing in xe_oa_init_oa_buffer() remains necessary for zero report-id/timestamp detection on enable/re-enable. (cherry picked from commit 126c4c5388f9311a390b9b254a835b0cf0f55331)

Published Oct 28, 2026 · Updated Oct 28, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

No scoring signals.

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

—

No EPSS score.

Affects

Linux

CVSS base

—

Score not published yet.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux	≥ 392bf22238ff88506f410c464ba0c7a84e9de471 and < 21f41b6daf0dbe2cdaaf9f54af6e23fd3c9190b9≥ 392bf22238ff88506f410c464ba0c7a84e9de471 and < cd3e2918c247db631d88cdd704596d9d27e5513e≥ 392bf22238ff88506f410c464ba0c7a84e9de471 and < fd8662823caa114a63f07222d2aa448f6ac5e864version 6.11	Vulnerable	CVE Program (cve.org) e CISA ADP

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Not enough vector or weakness data: use the affected application’s logs as a starting point.

application logs

Timeline

What happened to this CVE, newest first.

2026
Record published
Oct 28, 2026
Affected products added · linux/linux
Oct 28, 2026 · CVE Program (cve.org) e CISA ADP
Source status changed · → Received
Oct 28, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 28, 2026 · Alertas do Telegram
CVE published
Oct 28, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

1× References added · Oct 28, 2026 – Oct 28, 2026
1× Official description updated · Oct 28, 2026 – Oct 28, 2026

References

3 on the record

git.kernel.org/stable/c/cd3e2918c247db631d88cdd704596d9d27e5513e
NIST National Vulnerability Database
git.kernel.org/stable/c/fd8662823caa114a63f07222d2aa448f6ac5e864
NIST National Vulnerability Database
git.kernel.org/stable/c/21f41b6daf0dbe2cdaaf9f54af6e23fd3c9190b9
NIST National Vulnerability Database

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

Unknown CVE-2026-99215 power: supply: core: prevent unregistering a power supply while a callback runs 10h
Unknown CVE-2026-99216 Drivers: hv: Don't reset VMBus connection state on error/exit paths 10h
Unknown CVE-2026-99214 drm/vc4: hdmi: Move packet RAM enable to PM runtime 10h
Unknown CVE-2026-99207 scsi: target: Disable interrupts while holding delayed_cmd_lock 10h
Unknown CVE-2026-99209 drm/xe: skip eviction of a BO with no resource 10h
Unknown CVE-2026-99210 accel/rocket: clear rdev on device init failure 10h

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No CVSS score published by NVD, the CNA, CISA or GitHub so far.
No FIRST EPSS score.
No fixed version, patch or mitigation documented.
No CISA SSVC assessment.
No CWE classification.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-99208 is "drm/xe/oa: Zero OA buffer at allocation", rated Unknown. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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