CVE-2026-98155: Linux kernel · accel/qaic: Address potential out-of-bounds read in resp_worker()
Affects Linux kernelSource GCVE Database
Not known to be exploited · CVSS 7.1 High.
Data as of 26 Oct 2026, 14:05 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 1% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 25 Sep 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.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix is available that properly reuses the bounds checking function in resp_worker() to prevent out-of-bounds reads. Users should apply the official Linux kernel updates that address this issue in the affected versions. Since this is not a cloud service, remediation depends on deploying patched kernel versions. Check the vendor or distribution advisory for the exact patch availability and update instructions.
Description
A vulnerability in the Linux kernel's accel/qaic component could lead to an out-of-bounds read in the resp_worker() function. This occurs because a previous fix skipped bounds checking when handling certain messages, potentially causing reads past allocated memory, infinite loops, or kernel panics when a malformed wire message is sent from the device.
References
- ubuntu.com/security/CVE-2026-98155 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-98155 (opens in a new tab)
- git.kernel.org/stable/c/c72e81ee46bdd4c221114d6e9515e9b4647616d7 (opens in a new tab)
- git.kernel.org/stable/c/f4b64488f3deca63f7fbc7d7c3835b2e668003f9 (opens in a new tab)
- git.kernel.org/stable/c/ab243f74ab4084ca5c8dec608cb5b0deb27db067 (opens in a new tab)
- git.kernel.org/stable/c/12deeade460d47031267256ba07add51cc7eabd0 (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-98155 (opens in a new tab)
- git.kernel.org/stable/c/5807a65f301b6c0e73a2dc03dd6f5e80a2861b72 (opens in a new tab)