Answer in brief
CVE-2022-49802 records a Medium severity (CVSS 5.5) vulnerability in ftrace: Fix null pointer dereference in ftrace_add_mod(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.1:rc5:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=673feb9d76ab3eddde7acfd94b206e321cfc90b9 <665b4c6648bf2b91f69b33817f4321cf4c3cafe9 || >=673feb9d76ab3eddde7acfd94b206e321cfc90b9 <b5bfc61f541d3f092b13dedcfe000d86eb8e133c || >=673feb9d76ab3eddde7acfd94b206e321cfc90b9 <f715f31559b82e3f75ce047fa476de63d8107584 || >=673feb9d76ab3eddde7acfd94b206e321cfc90b9 <6a14828caddad0d989495a72af678adf60992704 || >=673feb9d76ab3eddde7acfd94b206e321cfc90b9 <1bea037a1abb23a6729bef36a2265a4565f5ea77 || >=673feb9d76ab3eddde7acfd94b206e321cfc90b9 <6e50eb4b1807017f6c2d5089064256ce2de8aef1 || >=673feb9d76ab3eddde7acfd94b206e321cfc90b9 <19ba6c8af9382c4c05dc6a0a79af3013b9a35cd0 | 665b4c6648bf2b91f69b33817f4321cf4c3cafe9, b5bfc61f541d3f092b13dedcfe000d86eb8e133c, f715f31559b82e3f75ce047fa476de63d8107584, 6a14828caddad0d989495a72af678adf60992704, 1bea037a1abb23a6729bef36a2265a4565f5ea77, 6e50eb4b1807017f6c2d5089064256ce2de8aef1, 19ba6c8af9382c4c05dc6a0a79af3013b9a35cd0 |
| Linux/Linuxgeneric | 4.13 | Not reported |
Published upstream
May 1, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 5, 2026
In the Linux kernel, the following vulnerability has been resolved: ftrace: Fix null pointer dereference in ftrace_add_mod() The @ftrace_mod is allocated by kzalloc(), so both the members {prev,next} of @ftrace_mode->list are NULL, it's not a valid state to call list_del(). If kstrdup() for @ftrace_mod->{func|module} fails, it goes to @out_free tag and calls free_ftrace_mod() to destroy @ftrace_mod, then list_del() will write prev->next and next->prev, where null pointer dereference happens. BUG: kernel NULL pointer dereference, address: 0000000000000008 Oops: 0002 [#1] PREEMPT SMP NOPTI Call Trace: <TASK> ftrace_mod_callback+0x20d/0x220 ? do_filp_open+0xd9/0x140 ftrace_process_regex.isra.51+0xbf/0x130 ftrace_regex_write.isra.52.part.53+0x6e/0x90 vfs_write+0xee/0x3a0 ? __audit_filter_op+0xb1/0x100 ? auditd_test_task+0x38/0x50 ksys_write+0xa5/0xe0 do_syscall_64+0x3a/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd Kernel panic - not syncing: Fatal exception So call INIT_LIST_HEAD() to initialize the list member to fix this issue.
Quoted source text, attributed separately from HOL analysis.