Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: drm/xe/pt: Fix NULL pointer dereference in xe_pt_zap_ptes_entry() The page-table walk framework may pass a NULL *child pointer for unpopulated entries. xe_pt_zap_ptes_entry() called container_of(*child) before checking for NULL, then dereferenced the result, causing a crash. Move the container_of() call after a NULL guard, so the function returns early instead of proceeding with an invalid pointer. XE_WARN_ON is kept to help root cause the issue, but we now bail instead of crashing the driver. v2: Comment that triggering XE_WARN_ON is unexpected behavior (Matt Brost) (cherry picked from commit b9297d19d9df5d4b6c994648570c5dcd1cac68ff)
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected dd08ebf6c3525a7ea2186e636df064ea47281987 before ff330ce16c846b70164ff0eb544c81219d4c5c08; affected dd08ebf6c3525a7ea2186e636df064ea47281987 before 78b1074966d290d4517f42bc81e13c4349368d12; affected dd08ebf6c3525a7ea2186e636df064ea47281987 before d94b9922b2ae5ee6e900f8da0bd537b251c6110c; affected dd08ebf6c3525a7ea2186e636df064ea47281987 before 3feeb667197bd58a17f4edfdbcad249ffcb3c864 |
| Linux / Linux | affected 6.8; unaffected 0 before 6.8; unaffected 6.12.97 through 6.12.*; unaffected 6.18.40 through 6.18.*; unaffected 7.1.5 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.