CVE-2022-48869

In the Linux kernel, the following vulnerability has been resolved: USB: gadgetfs: Fix race between mounting and unmounting The syzbot fuzzer and Gerald Lee have identified a use-after-free bug in the gadgetfs driver, involving processes concurrently mounting and unmounting the gadgetfs filesystem. In particular, gadgetfs_fill_super() can race with gadgetfs_kill_sb(), causing the latter to deallocate the_device while the former is using it. The output from KASAN says, in part: BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:102 [inline] BUG: KASAN: use-after-free in atomic_fetch_sub_release include/linux/atomic/atomic-instrumented.h:176 [inline] BUG: KASAN: use-after-free in __refcount_sub_and_test include/linux/refcount.h:272 [inline] BUG: KASAN: use-after-free in __refcount_dec_and_test include/linux/refcount.h:315 [inline] BUG: KASAN: use-after-free in refcount_dec_and_test include/linux/refcount.h:333 [inline] BUG: KASAN: use-after-free in put_dev drivers/usb/gadget/legacy/inode.c:159 [inline] BUG: KASAN: use-after-free in gadgetfs_kill_sb+0x33/0x100 drivers/usb/gadget/legacy/inode.c:2086 Write of size 4 at addr ffff8880276d7840 by task syz-executor126/18689 CPU: 0 PID: 18689 Comm: syz-executor126 Not tainted 6.1.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: <TASK> ... atomic_fetch_sub_release include/linux/atomic/atomic-instrumented.h:176 [inline] __refcount_sub_and_test include/linux/refcount.h:272 [inline] __refcount_dec_and_test include/linux/refcount.h:315 [inline] refcount_dec_and_test include/linux/refcount.h:333 [inline] put_dev drivers/usb/gadget/legacy/inode.c:159 [inline] gadgetfs_kill_sb+0x33/0x100 drivers/usb/gadget/legacy/inode.c:2086 deactivate_locked_super+0xa7/0xf0 fs/super.c:332 vfs_get_super fs/super.c:1190 [inline] get_tree_single+0xd0/0x160 fs/super.c:1207 vfs_get_tree+0x88/0x270 fs/super.c:1531 vfs_fsconfig_locked fs/fsopen.c:232 [inline] The simplest solution is to ensure that gadgetfs_fill_super() and gadgetfs_kill_sb() are serialized by making them both acquire a new mutex.

CVSS v3 4.7 MEDIUM

4.7^/10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.0 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/616fd34d017000ecf9097368b13d8a266f4920b3	Patch
https://git.kernel.org/stable/c/856e4b5e53f21edbd15d275dde62228dd94fb2b4	Patch
https://git.kernel.org/stable/c/9a39f4626b361ee7aa10fd990401c37ec3b466ae	Patch
https://git.kernel.org/stable/c/a2e075f40122d8daf587db126c562a67abd69cf9	Patch
https://git.kernel.org/stable/c/d18dcfe9860e842f394e37ba01ca9440ab2178f4	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

06 Sep 2024, 14:19

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 4.7
CPE		cpe:2.3:o:linux:linux_kernel::::::::
First Time		Linux linux Kernel Linux
CWE		CWE-416
References	~~() https://git.kernel.org/stable/c/616fd34d017000ecf9097368b13d8a266f4920b3 -~~	() https://git.kernel.org/stable/c/616fd34d017000ecf9097368b13d8a266f4920b3 - Patch
References	~~() https://git.kernel.org/stable/c/856e4b5e53f21edbd15d275dde62228dd94fb2b4 -~~	() https://git.kernel.org/stable/c/856e4b5e53f21edbd15d275dde62228dd94fb2b4 - Patch
References	~~() https://git.kernel.org/stable/c/9a39f4626b361ee7aa10fd990401c37ec3b466ae -~~	() https://git.kernel.org/stable/c/9a39f4626b361ee7aa10fd990401c37ec3b466ae - Patch
References	~~() https://git.kernel.org/stable/c/a2e075f40122d8daf587db126c562a67abd69cf9 -~~	() https://git.kernel.org/stable/c/a2e075f40122d8daf587db126c562a67abd69cf9 - Patch
References	~~() https://git.kernel.org/stable/c/d18dcfe9860e842f394e37ba01ca9440ab2178f4 -~~	() https://git.kernel.org/stable/c/d18dcfe9860e842f394e37ba01ca9440ab2178f4 - Patch
Summary		(es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: USB: gadgetfs: corrige la ejecución entre montar y desmontar Syzbot fuzzer y Gerald Lee han identificado un error de use-after-free en el controlador gadgetfs, que involucra procesos que montan y desmontan simultáneamente los gadgetfs. sistema de archivos. En particular, gadgetfs_fill_super() puede competir con gadgetfs_kill_sb(), provocando que este último desasigne the_device mientras el primero lo está usando. El resultado de KASAN dice, en parte: ERROR: KASAN: use-after-free en instrument_atomic_read_write include/linux/instrumented.h:102 [en línea] ERROR: KASAN: use-after-free en atomic_fetch_sub_release include/linux/atomic/atomic -instrumented.h:176 [en línea] ERROR: KASAN: uso después de liberación en __refcount_sub_and_test include/linux/refcount.h:272 [en línea] ERROR: KASAN: uso después de liberación en __refcount_dec_and_test include/linux/refcount.h :315 [en línea] ERROR: KASAN: uso después de liberación en refcount_dec_and_test include/linux/refcount.h:333 [en línea] ERROR: KASAN: uso después de liberación en put_dev drivers/usb/gadget/legacy/inode.c :159 [en línea] ERROR: KASAN: use-after-free en gadgetfs_kill_sb+0x33/0x100 drivers/usb/gadget/legacy/inode.c:2086 Escritura de tamaño 4 en la dirección ffff8880276d7840 mediante la tarea syz-executor126/18689 CPU: 0 PID: 18689 Comunicación: syz-executor126 No contaminado 6.1.0-syzkaller #0 Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 26/10/2022 Seguimiento de llamadas: ... atomic_fetch_sub_release include/linux/ atomic/atomic-instrumented.h:176 [en línea] __refcount_sub_and_test include/linux/refcount.h:272 [en línea] __refcount_dec_and_test include/linux/refcount.h:315 [en línea] refcount_dec_and_test include/linux/refcount.h:333 [en línea ] put_dev drivers/usb/gadget/legacy/inode.c:159 [en línea] gadgetfs_kill_sb+0x33/0x100 drivers/usb/gadget/legacy/inode.c:2086 deactivate_locked_super+0xa7/0xf0 fs/super.c:332 vfs_get_super fs /super.c:1190 [en línea] get_tree_single+0xd0/0x160 fs/super.c:1207 vfs_get_tree+0x88/0x270 fs/super.c:1531 vfs_fsconfig_locked fs/fsopen.c:232 [en línea] La solución más sencilla es garantizar que gadgetfs_fill_super() y gadgetfs_kill_sb() se serializan haciendo que ambos adquieran un nuevo mutex.

21 Aug 2024, 07:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2024-08-21 07:15

Updated : 2024-09-06 14:19

NVD link : CVE-2022-48869

Mitre link : CVE-2022-48869

CVE.ORG link : CVE-2022-48869

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-416

Use After Free

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In particular, gadgetfs_fill_super()\ncan race with gadgetfs_kill_sb(), causing the latter to deallocate\nthe_device while the former is using it. The output from KASAN says,\nin part:\n\nBUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:102 [inline]\nBUG: KASAN: use-after-free in atomic_fetch_sub_release include/linux/atomic/atomic-instrumented.h:176 [inline]\nBUG: KASAN: use-after-free in __refcount_sub_and_test include/linux/refcount.h:272 [inline]\nBUG: KASAN: use-after-free in __refcount_dec_and_test include/linux/refcount.h:315 [inline]\nBUG: KASAN: use-after-free in refcount_dec_and_test include/linux/refcount.h:333 [inline]\nBUG: KASAN: use-after-free in put_dev drivers/usb/gadget/legacy/inode.c:159 [inline]\nBUG: KASAN: use-after-free in gadgetfs_kill_sb+0x33/0x100 drivers/usb/gadget/legacy/inode.c:2086\nWrite of size 4 at addr ffff8880276d7840 by task syz-executor126/18689\n\nCPU: 0 PID: 18689 Comm: syz-executor126 Not tainted 6.1.0-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022\nCall Trace:\n <TASK>\n...\n atomic_fetch_sub_release include/linux/atomic/atomic-instrumented.h:176 [inline]\n __refcount_sub_and_test include/linux/refcount.h:272 [inline]\n __refcount_dec_and_test include/linux/refcount.h:315 [inline]\n refcount_dec_and_test include/linux/refcount.h:333 [inline]\n put_dev drivers/usb/gadget/legacy/inode.c:159 [inline]\n gadgetfs_kill_sb+0x33/0x100 drivers/usb/gadget/legacy/inode.c:2086\n deactivate_locked_super+0xa7/0xf0 fs/super.c:332\n vfs_get_super fs/super.c:1190 [inline]\n get_tree_single+0xd0/0x160 fs/super.c:1207\n vfs_get_tree+0x88/0x270 fs/super.c:1531\n vfs_fsconfig_locked fs/fsopen.c:232 [inline]\n\nThe simplest solution is to ensure that gadgetfs_fill_super() and\ngadgetfs_kill_sb() are serialized by making them both acquire a new\nmutex."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: USB: gadgetfs: corrige la ejecuci\u00f3n entre montar y desmontar Syzbot fuzzer y Gerald Lee han identificado un error de use-after-free en el controlador gadgetfs, que involucra procesos que montan y desmontan simult\u00e1neamente los gadgetfs. sistema de archivos. En particular, gadgetfs_fill_super() puede competir con gadgetfs_kill_sb(), provocando que este \u00faltimo desasigne the_device mientras el primero lo est\u00e1 usando. El resultado de KASAN dice, en parte: ERROR: KASAN: use-after-free en instrument_atomic_read_write include/linux/instrumented.h:102 [en l\u00ednea] ERROR: KASAN: use-after-free en atomic_fetch_sub_release include/linux/atomic/atomic -instrumented.h:176 [en l\u00ednea] ERROR: KASAN: uso despu\u00e9s de liberaci\u00f3n en __refcount_sub_and_test include/linux/refcount.h:272 [en l\u00ednea] ERROR: KASAN: uso despu\u00e9s de liberaci\u00f3n en __refcount_dec_and_test include/linux/refcount.h :315 [en l\u00ednea] ERROR: KASAN: uso despu\u00e9s de liberaci\u00f3n en refcount_dec_and_test include/linux/refcount.h:333 [en l\u00ednea] ERROR: KASAN: uso despu\u00e9s de liberaci\u00f3n en put_dev drivers/usb/gadget/legacy/inode.c :159 [en l\u00ednea] ERROR: KASAN: use-after-free en gadgetfs_kill_sb+0x33/0x100 drivers/usb/gadget/legacy/inode.c:2086 Escritura de tama\u00f1o 4 en la direcci\u00f3n ffff8880276d7840 mediante la tarea syz-executor126/18689 CPU: 0 PID: 18689 Comunicaci\u00f3n: syz-executor126 No contaminado 6.1.0-syzkaller #0 Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 26/10/2022 Seguimiento de llamadas: ... atomic_fetch_sub_release include/linux/ atomic/atomic-instrumented.h:176 [en l\u00ednea] __refcount_sub_and_test include/linux/refcount.h:272 [en l\u00ednea] __refcount_dec_and_test include/linux/refcount.h:315 [en l\u00ednea] refcount_dec_and_test include/linux/refcount.h:333 [en l\u00ednea ] put_dev drivers/usb/gadget/legacy/inode.c:159 [en l\u00ednea] gadgetfs_kill_sb+0x33/0x100 drivers/usb/gadget/legacy/inode.c:2086 deactivate_locked_super+0xa7/0xf0 fs/super.c:332 vfs_get_super fs /super.c:1190 [en l\u00ednea] get_tree_single+0xd0/0x160 fs/super.c:1207 vfs_get_tree+0x88/0x270 fs/super.c:1531 vfs_fsconfig_locked fs/fsopen.c:232 [en l\u00ednea] La soluci\u00f3n m\u00e1s sencilla es garantizar que gadgetfs_fill_super() y gadgetfs_kill_sb() se serializan haciendo que ambos adquieran un nuevo mutex."}], "lastModified": "2024-09-06T14:19:58.030", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D96CFFAF-9D69-4742-997E-484E7278F62E", "versionEndExcluding": "5.4.230", "versionStartIncluding": "5.3"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C6002D5B-9B6A-4788-B943-E3EE01E01303", "versionEndExcluding": "5.10.165", "versionStartIncluding": "5.5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E995CDA5-7223-4FDB-BAD3-81B22C763A43", "versionEndExcluding": "5.15.90", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A6AFE6C9-3F59-4711-B2CF-7D6682FF6BD0", "versionEndExcluding": "6.1.8", "versionStartIncluding": "5.16"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}

4.7 /10