Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: printk: Fix possible console use-after-free When emitting a record via legacy printing, it is possible that a handover to another legacy printing context occurs. When a context has performed a handover, the console SRCU read lock is released and the pointer to the console struct might now be invalid. Therefore, after calling nbcon_legacy_emit_next_record() or console_emit_next_record(), it is necessary to check if a handover occurred _before_ further @con usage. Sashiko pointed out that console_flush_one_record() was not doing this. In console_flush_one_record(), after emitting a record, move the further usage of @con after the handover check.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected c158834b223fbfab3a14855ac203b8d9cddbbefd before f0104a7b730de32eefb3d4a27279592b5504ad59; affected c158834b223fbfab3a14855ac203b8d9cddbbefd before fbf9bb81b21537ede387a31cc586f1d2ce66a74e; affected c158834b223fbfab3a14855ac203b8d9cddbbefd before 8f194dee0c0d1223255bae1429e1939882f540fc; affected c158834b223fbfab3a14855ac203b8d9cddbbefd before 36630cafbeede0b64c370edb2f7b4094327ee1e0 |
| Linux / Linux | affected 6.12; unaffected 0 before 6.12; unaffected 6.12.110 through 6.12.*; unaffected 6.18.52 through 6.18.*; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.