CVE-2022-49802
published 2025-05-01CVE-2022-49802: 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…
PriorityP419medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.21%
11.4th percentile
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:
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.
Affected
20 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.0.10-1 (bookworm) | linux 6.0.10-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= 673feb9d76ab3eddde7acfd94b206e321cfc90b9 < 665b4c6648bf2b91f69b33817f4321cf4c3cafe9 | 665b4c6648bf2b91f69b33817f4321cf4c3cafe9 |
| linux | linux | >= 673feb9d76ab3eddde7acfd94b206e321cfc90b9 < b5bfc61f541d3f092b13dedcfe000d86eb8e133c | b5bfc61f541d3f092b13dedcfe000d86eb8e133c |
| linux | linux | >= 673feb9d76ab3eddde7acfd94b206e321cfc90b9 < f715f31559b82e3f75ce047fa476de63d8107584 | f715f31559b82e3f75ce047fa476de63d8107584 |
| linux | linux | >= 673feb9d76ab3eddde7acfd94b206e321cfc90b9 < 6a14828caddad0d989495a72af678adf60992704 | 6a14828caddad0d989495a72af678adf60992704 |
| linux | linux | >= 673feb9d76ab3eddde7acfd94b206e321cfc90b9 < 1bea037a1abb23a6729bef36a2265a4565f5ea77 | 1bea037a1abb23a6729bef36a2265a4565f5ea77 |
| linux | linux | >= 673feb9d76ab3eddde7acfd94b206e321cfc90b9 < 6e50eb4b1807017f6c2d5089064256ce2de8aef1 | 6e50eb4b1807017f6c2d5089064256ce2de8aef1 |
| linux | linux | >= 673feb9d76ab3eddde7acfd94b206e321cfc90b9 < 19ba6c8af9382c4c05dc6a0a79af3013b9a35cd0 | 19ba6c8af9382c4c05dc6a0a79af3013b9a35cd0 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 5.10.158-1 | 5.10.158-1 |
| linux | linux_kernel | >= 0 < 6.0.10-1 | 6.0.10-1 |
| linux | linux_kernel | >= 0 < 6.0.10-1 | 6.0.10-1 |
| linux | linux_kernel | >= 0 < 6.0.10-1 | 6.0.10-1 |
| linux | linux_kernel | >= 4.13 < 4.14.300 | 4.14.300 |
| linux | linux_kernel | >= 4.15 < 4.19.267 | 4.19.267 |
| linux | linux_kernel | >= 4.20 < 5.4.225 | 5.4.225 |
| linux | linux_kernel | >= 5.11 < 5.15.80 | 5.15.80 |
| linux | linux_kernel | >= 5.16 < 6.0.10 | 6.0.10 |
| linux | linux_kernel | >= 5.5 < 5.10.156 | 5.10.156 |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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OSV
CVE-2022-49802: In the Linux kernel, the following vulnerability has been resolved: ftrace: Fix null pointer dereference in ftrace_add_mod() The @ftrace_mod is alloca
osv·2025-05-01·CVSS 5.5
CVE-2022-49802 [MEDIUM] CVE-2022-49802: In the Linux kernel, the following vulnerability has been resolved: ftrace: Fix null pointer dereference in ftrace_add_mod() The @ftrace_mod is alloca
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: 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+0xb1/0x10
GHSA
GHSA-5fcv-vwgv-jrcx: In the Linux kernel, the following vulnerability has been resolved:
ftrace: Fix null pointer dereference in ftrace_add_mod()
The @ftrace_mod is allo
ghsa_unreviewed·2025-05-01
CVE-2022-49802 [MEDIUM] CWE-476 GHSA-5fcv-vwgv-jrcx: In the Linux kernel, the following vulnerability has been resolved:
ftrace: Fix null pointer dereference in ftrace_add_mod()
The @ftrace_mod is allo
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:
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/
Red Hat
kernel: ftrace: Fix null pointer dereference in ftrace_add_mod()
vendor_redhat·2025-05-01·CVSS 5.5
CVE-2022-49802 [MEDIUM] kernel: ftrace: Fix null pointer dereference in ftrace_add_mod()
kernel: ftrace: Fix null pointer dereference in ftrace_add_mod()
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:
ftrace_mod_callback+0x20d/0x220
? do_filp_open+0xd9/0x140
ftrace_process_regex.isra.51+0xbf/0x130
ftrace_regex_write.isra.52.p
Debian
CVE-2022-49802: linux - In the Linux kernel, the following vulnerability has been resolved: ftrace: Fix...
vendor_debian·2022·CVSS 5.5
CVE-2022-49802 [MEDIUM] CVE-2022-49802: linux - In the Linux kernel, the following vulnerability has been resolved: ftrace: Fix...
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: 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+0xb1/0x10
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/19ba6c8af9382c4c05dc6a0a79af3013b9a35cd0https://git.kernel.org/stable/c/1bea037a1abb23a6729bef36a2265a4565f5ea77https://git.kernel.org/stable/c/665b4c6648bf2b91f69b33817f4321cf4c3cafe9https://git.kernel.org/stable/c/6a14828caddad0d989495a72af678adf60992704https://git.kernel.org/stable/c/6e50eb4b1807017f6c2d5089064256ce2de8aef1https://git.kernel.org/stable/c/b5bfc61f541d3f092b13dedcfe000d86eb8e133chttps://git.kernel.org/stable/c/f715f31559b82e3f75ce047fa476de63d8107584
2025-05-01
Published