CVE-2026-31753 (GCVE-0-2026-31753)

Vulnerability from cvelistv5 – Published: 2026-05-01 14:14 – Updated: 2026-05-11 22:15
VLAI
Title
auxdisplay: line-display: fix NULL dereference in linedisp_release
Summary
In the Linux kernel, the following vulnerability has been resolved: auxdisplay: line-display: fix NULL dereference in linedisp_release linedisp_release() currently retrieves the enclosing struct linedisp via to_linedisp(). That lookup depends on the attachment list, but the attachment may already have been removed before put_device() invokes the release callback. This can happen in linedisp_unregister(), and can also be reached from some linedisp_register() error paths. In that case, to_linedisp() returns NULL and linedisp_release() dereferences it while freeing the display resources. The struct device released here is the embedded linedisp->dev used by linedisp_register(), so retrieve the enclosing object directly with container_of() instead.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
Linux CNA under the mitre root
CNA scorecard D 54/100 over 6619 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 66c93809487e62c4f59ef08625a3fbc0a7de6dd2 , < 625fdac41cfc4ca9e1774a0d31d7985aec2c1d66 (git)
Affected: 66c93809487e62c4f59ef08625a3fbc0a7de6dd2 , < 7f138de156b20d9f9da6f72f90b63c01941d97d3 (git)
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Linux Linux Affected: 6.19
Unaffected: 0 , < 6.19 (semver)
Unaffected: 6.19.12 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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}



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