CVE-2022-49567

published 2025-02-26

CVE-2022-49567: In the Linux kernel, the following vulnerability has been resolved: mm/mempolicy: fix uninit-value in mpol_rebind_policy() mpol_set_nodemask()(mm/mempolicy.c)…

Priority P4 19 medium 5.5 CVSS 3.1

AV L AC L PR L UI N S U C N I N A H

In the Linux kernel, the following vulnerability has been resolved:

mm/mempolicy: fix uninit-value in mpol_rebind_policy()

mpol_set_nodemask()(mm/mempolicy.c) does not set up nodemask when
pol->mode is MPOL_LOCAL. Check pol->mode before access
pol->w.cpuset_mems_allowed in mpol_rebind_policy()(mm/mempolicy.c).

BUG: KMSAN: uninit-value in mpol_rebind_policy mm/mempolicy.c:352 [inline]
BUG: KMSAN: uninit-value in mpol_rebind_task+0x2ac/0x2c0 mm/mempolicy.c:368
mpol_rebind_policy mm/mempolicy.c:352 [inline]
mpol_rebind_task+0x2ac/0x2c0 mm/mempolicy.c:368
cpuset_change_task_nodemask kernel/cgroup/cpuset.c:1711 [inline]
cpuset_attach+0x787/0x15e0 kernel/cgroup/cpuset.c:2278
cgroup_migrate_execute+0x1023/0x1d20 kernel/cgroup/cgroup.c:2515
cgroup_migrate kernel/cgroup/cgroup.c:2771 [inline]
cgroup_attach_task+0x540/0x8b0 kernel/cgroup/cgroup.c:2804
__cgroup1_procs_write+0x5cc/0x7a0 kernel/cgroup/cgroup-v1.c:520
cgroup1_tasks_write+0x94/0xb0 kernel/cgroup/cgroup-v1.c:539
cgroup_file_write+0x4c2/0x9e0 kernel/cgroup/cgroup.c:3852
kernfs_fop_write_iter+0x66a/0x9f0 fs/kernfs/file.c:296
call_write_iter include/linux/fs.h:2162 [inline]
new_sync_write fs/read_write.c:503 [inline]
vfs_write+0x1318/0x2030 fs/read_write.c:590
ksys_write+0x28b/0x510 fs/read_write.c:643
__do_sys_write fs/read_write.c:655 [inline]
__se_sys_write fs/read_write.c:652 [inline]
__x64_sys_write+0xdb/0x120 fs/read_write.c:652
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x44/0xae

Uninit was created at:
slab_post_alloc_hook mm/slab.h:524 [inline]
slab_alloc_node mm/slub.c:3251 [inline]
slab_alloc mm/slub.c:3259 [inline]
kmem_cache_alloc+0x902/0x11c0 mm/slub.c:3264
mpol_new mm/mempolicy.c:293 [inline]
do_set_mempolicy+0x421/0xb70 mm/mempolicy.c:853
kernel_set_mempolicy mm/mempolicy.c:1504 [inline]
__do_sys_set_mempolicy mm/mempolicy.c:1510 [inline]
__se_sys_set_mempolicy+0x44c/0xb60 mm/mempolicy.c:1507
__x64_sys_set_memp

Affected

16 ranges

Vendor	Product	Version range	Fixed in
debian	linux	< linux 5.18.16-1 (bookworm)	linux 5.18.16-1 (bookworm)
linux	linux	—	—
linux	linux	>= 7858d7bca7fbbbbd5b940d2ec371b2d060b21b84 < 8c5429a04ccd8dbcc3c753dab2f4126774ec28d4	8c5429a04ccd8dbcc3c753dab2f4126774ec28d4
linux	linux	>= 7858d7bca7fbbbbd5b940d2ec371b2d060b21b84 < 777e563f10e91e91130fe06bee85220d508e7b9b	777e563f10e91e91130fe06bee85220d508e7b9b
linux	linux	>= 7858d7bca7fbbbbd5b940d2ec371b2d060b21b84 < 018160ad314d75b1409129b2247b614a9f35894c	018160ad314d75b1409129b2247b614a9f35894c
linux	linux_kernel	< 4.9.325	4.9.325
linux	linux_kernel	>= 0 < 5.10.136-1	5.10.136-1
linux	linux_kernel	>= 0 < 5.18.16-1	5.18.16-1
linux	linux_kernel	>= 0 < 5.18.16-1	5.18.16-1
linux	linux_kernel	>= 0 < 5.18.16-1	5.18.16-1
linux	linux_kernel	>= 4.10 < 4.14.290	4.14.290
linux	linux_kernel	>= 4.15 < 4.19.254	4.19.254
linux	linux_kernel	>= 4.20 < 5.4.208	5.4.208
linux	linux_kernel	>= 5.11 < 5.15.58	5.15.58
linux	linux_kernel	>= 5.16 < 5.18.15	5.18.15
linux	linux_kernel	>= 5.5 < 5.10.134	5.10.134

CVSS provenance

nvd v3.1 5.5 MEDIUM CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

osv 5.5 MEDIUM

vendor_debian 5.5 MEDIUM

vendor_redhat 5.5 MEDIUM

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