CVE-2026-80677: Linux kernel · driver core: use READ_ONCE() for dev->driver in dev_has_sync_state()
Affects Linux kernelSource GCVE Database
Not known to be exploited · CVSS 7.8 High · fixed in 5.15.0-1117.124~20.04.1 : patch Linux kernel soon.
Data as of 26 Oct 2026, 12:55 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 5.15.0-1117.124~20.04.1, 5.15.0-1123.132~20.04.1, 5.15.0-1122.131~20.04.1 +40
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 28 Aug 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
Upgrade to a fixed release listed under Affected software.
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
An official fix is available and should be applied. The vulnerability has been resolved by updating the Linux kernel to use atomic access macros (READ_ONCE and WRITE_ONCE) for dev->driver in the affected function. Users should upgrade to patched kernel versions as provided by their Linux distribution vendors.
Description
A use-after-free or race condition vulnerability in the Linux kernel driver core was fixed by ensuring dev->driver is read atomically using READ_ONCE() in the dev_has_sync_state() function. The issue involved dev->driver being read twice without proper locking, which could lead to inconsistent or stale data access during concurrent unbind operations. This flaw was resolved by reading dev->driver exactly once, matching the WRITE_ONCE() usage in device_set_driver().
References
- nvd.nist.gov/vuln/detail/CVE-2026-80677 (opens in a new tab)
- git.kernel.org/stable/c/358697929351f619143f59c6a8a15a4994748b79 (opens in a new tab)
- git.kernel.org/stable/c/51b3e1de53ee5b7775c7ff90e67fdb2665fce938 (opens in a new tab)
- git.kernel.org/stable/c/5e79e0180515b31b2e2244dc3d256fd8b5a07021 (opens in a new tab)
- git.kernel.org/stable/c/860885fcd2611bca8c28dac8b2c1c7ff160f763e (opens in a new tab)
- git.kernel.org/stable/c/89789e4c141904506163dcb91c7289a074573931 (opens in a new tab)
- git.kernel.org/stable/c/9b0f4082a09760939588135d60a8e9cc994bfa3e (opens in a new tab)
- git.kernel.org/stable/c/cc77f0d91e3214e4292208f02a1dc09a31f9aac7 (opens in a new tab)
- git.kernel.org/stable/c/e9506871a8ea304cde48ff4a57226df2aadddae3 (opens in a new tab)
- ubuntu.com/security/CVE-2026-80677 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-80677 (opens in a new tab)
- git.kernel.org/linus/e9506871a8ea304cde48ff4a57226df2aadddae3 (opens in a new tab)
- ubuntu.com/security/notices/USN-8878-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8879-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8877-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8875-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8888-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8889-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8887-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8888-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8887-2 (opens in a new tab)