VulnerabilityPublished 23 Oct 2026

CVE-2026-98886: Linux kernel · drm/gma500: return errors from Oaktrail HDMI I2C reads

Source GCVE Database

Authoritative record:CVE-2026-98886· Medium

Not known to be exploited · fixed in f85e8224bd4e1a0939cbfe13a6220fbddf61127c : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:05 UTC

Severity

Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 8% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in f85e8224bd4e1a0939cbfe13a6220fbddf61127c, c268df0653ab07bafc3d191e74ea097e3d9b9e69, 898d209157fe2a245f7d9fe28c5921037d8b5033 +4

Exploitation evidence

Disclosed: evidence found.
CVE published 23 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-mmv9-fq67-57xh

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 1e585b52fd8ea59792634bc31d227eb3456af22e, < f85e8224bd4e1a0939cbfe13a6220fbddf61127c	Fixed in f85e8224bd4e1a0939cbfe13a6220fbddf61127c
LinuxLinux	Affected ≥ 1e585b52fd8ea59792634bc31d227eb3456af22e, < c268df0653ab07bafc3d191e74ea097e3d9b9e69	Fixed in c268df0653ab07bafc3d191e74ea097e3d9b9e69
LinuxLinux	Affected ≥ 1e585b52fd8ea59792634bc31d227eb3456af22e, < 898d209157fe2a245f7d9fe28c5921037d8b5033	Fixed in 898d209157fe2a245f7d9fe28c5921037d8b5033
LinuxLinux	Affected ≥ 1e585b52fd8ea59792634bc31d227eb3456af22e, < 15c6d7f7127a53b7312232178ecf03e5850161d2	Fixed in 15c6d7f7127a53b7312232178ecf03e5850161d2
LinuxLinux	Affected ≥ 1e585b52fd8ea59792634bc31d227eb3456af22e, < 9b5ce5c496efd20c1c662cedba88465d39ec1f93	Fixed in 9b5ce5c496efd20c1c662cedba88465d39ec1f93
LinuxLinux	Affected ≥ 1e585b52fd8ea59792634bc31d227eb3456af22e, < 09a950950e7e4e74e021e60941c8e816ef1b4f71	Fixed in 09a950950e7e4e74e021e60941c8e816ef1b4f71

AI-suggested

A fix has been implemented in the Linux kernel to properly handle timeouts and interrupts during HDMI I2C reads in the drm/gma500 driver. Users should update to the fixed kernel version once available. Patch status is not explicitly confirmed in the provided data; check the vendor advisory for current remediation guidance.

Description

A vulnerability in the Linux kernel's drm/gma500 driver for Oaktrail HDMI I2C reads could cause indefinite waiting during I2C transactions due to improper handling of timeouts and interrupts. The issue has been resolved by returning appropriate error codes when timeouts or interrupts occur during the I2C transaction wait, preventing infinite loops.

Impact

If exploited, this vulnerability could cause the affected driver to hang indefinitely during HDMI I2C transactions, potentially leading to denial of service conditions on systems using the drm/gma500 driver with Oaktrail HDMI hardware. There is no indication of code execution or privilege escalation from the provided data.

Summary

The Linux kernel's drm/gma500 driver had a flaw where the xfer_read() function waited for the HDMI I2C transaction to reach completion without properly handling timeout or signal interruptions from wait_for_completion_interruptible_timeout(). This could cause the function to wait indefinitely if the transaction state never advanced. The fix involves returning -ETIMEDOUT when the wait expires, propagating interrupted waits, and ensuring the I2C master_xfer callback returns the first transfer error instead of a successful message count.

References

Community reviews

Loading reviews…