CVE-2021-47497
published 2024-05-22CVE-2021-47497: In the Linux kernel, the following vulnerability has been resolved: nvmem: Fix shift-out-of-bound (UBSAN) with byte size cells If a cell has 'nbits' equal to a…
PriorityP337high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.22%
12.8th percentile
In the Linux kernel, the following vulnerability has been resolved:
nvmem: Fix shift-out-of-bound (UBSAN) with byte size cells
If a cell has 'nbits' equal to a multiple of BITS_PER_BYTE the logic
*p &= GENMASK((cell->nbits%BITS_PER_BYTE) - 1, 0);
will become undefined behavior because nbits modulo BITS_PER_BYTE is 0, and we
subtract one from that making a large number that is then shifted more than the
number of bits that fit into an unsigned long.
UBSAN reports this problem:
UBSAN: shift-out-of-bounds in drivers/nvmem/core.c:1386:8
shift exponent 64 is too large for 64-bit type 'unsigned long'
CPU: 6 PID: 7 Comm: kworker/u16:0 Not tainted 5.15.0-rc3+ #9
Hardware name: Google Lazor (rev3+) with KB Backlight (DT)
Workqueue: events_unbound deferred_probe_work_func
Call trace:
dump_backtrace+0x0/0x170
show_stack+0x24/0x30
dump_stack_lvl+0x64/0x7c
dump_stack+0x18/0x38
ubsan_epilogue+0x10/0x54
__ubsan_handle_shift_out_of_bounds+0x180/0x194
__nvmem_cell_read+0x1ec/0x21c
nvmem_cell_read+0x58/0x94
nvmem_cell_read_variable_common+0x4c/0xb0
nvmem_cell_read_variable_le_u32+0x40/0x100
a6xx_gpu_init+0x170/0x2f4
adreno_bind+0x174/0x284
component_bind_all+0xf0/0x264
msm_drm_bind+0x1d8/0x7a0
try_to_bring_up_master+0x164/0x1ac
__component_add+0xbc/0x13c
component_add+0x20/0x2c
dp_display_probe+0x340/0x384
platform_probe+0xc0/0x100
really_probe+0x110/0x304
__driver_probe_device+0xb8/0x120
driver_probe_device+0x4c/0xfc
__device_attach_driver+0xb0/0x128
bus_for_each_drv+0x90/0xdc
__device_attach+0xc8/0x174
device_initial_probe+0x20/0x2c
bus_probe_device+0x40/0xa4
deferred_probe_work_func+0x7c/0xb8
process_one_work+0x128/0x21c
process_scheduled_works+0x40/0x54
worker_thread+0x1ec/0x2a8
kthread+0x138/0x158
ret_from_fork+0x10/0x20
Fix it by making sure there are any bits to mask out.
Affected
22 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 5.14.16-1 (bookworm) | linux 5.14.16-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= 69aba7948cbe53f2f1827e84e9dd0ae470a5072e < abcb8d33e4d2215ccde5ab5ccf9f730a59d79d97 | abcb8d33e4d2215ccde5ab5ccf9f730a59d79d97 |
| linux | linux | >= 69aba7948cbe53f2f1827e84e9dd0ae470a5072e < 60df06bbdf497e37ed25ad40572c362e5b0998df | 60df06bbdf497e37ed25ad40572c362e5b0998df |
| linux | linux | >= 69aba7948cbe53f2f1827e84e9dd0ae470a5072e < 2df6c023050205c4d04ffc121bc549f65cb8d1df | 2df6c023050205c4d04ffc121bc549f65cb8d1df |
| linux | linux | >= 69aba7948cbe53f2f1827e84e9dd0ae470a5072e < eb0fc8e7170e61eaf65d28dee4a8baf4e86b19ca | eb0fc8e7170e61eaf65d28dee4a8baf4e86b19ca |
| linux | linux | >= 69aba7948cbe53f2f1827e84e9dd0ae470a5072e < 0594f1d048d8dc338eb9a240021b1d00ae1eb082 | 0594f1d048d8dc338eb9a240021b1d00ae1eb082 |
| linux | linux | >= 69aba7948cbe53f2f1827e84e9dd0ae470a5072e < 57e48886401b14cd351423fabfec2cfd18df4f66 | 57e48886401b14cd351423fabfec2cfd18df4f66 |
| linux | linux | >= 69aba7948cbe53f2f1827e84e9dd0ae470a5072e < 0e822e5413da1af28cca350cb1cb42b6133bdcae | 0e822e5413da1af28cca350cb1cb42b6133bdcae |
| linux | linux | >= 69aba7948cbe53f2f1827e84e9dd0ae470a5072e < 5d388fa01fa6eb310ac023a363a6cb216d9d8fe9 | 5d388fa01fa6eb310ac023a363a6cb216d9d8fe9 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 5.10.84-1 | 5.10.84-1 |
| linux | linux_kernel | >= 0 < 5.14.16-1 | 5.14.16-1 |
| linux | linux_kernel | >= 0 < 5.14.16-1 | 5.14.16-1 |
| linux | linux_kernel | >= 0 < 5.14.16-1 | 5.14.16-1 |
| linux | linux_kernel | >= 4.10 < 4.14.252 | 4.14.252 |
| linux | linux_kernel | >= 4.15 < 4.19.213 | 4.19.213 |
| linux | linux_kernel | >= 4.20 < 5.4.155 | 5.4.155 |
| linux | linux_kernel | >= 4.3 < 4.4.290 | 4.4.290 |
| linux | linux_kernel | >= 4.5 < 4.9.288 | 4.9.288 |
| linux | linux_kernel | >= 5.11 < 5.14.14 | 5.14.14 |
| linux | linux_kernel | >= 5.5 < 5.10.75 | 5.10.75 |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv7.8HIGH
vendor_debian7.8HIGH
vendor_redhat7.8HIGH
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
GHSA
GHSA-vgjx-6ccw-c3f6: In the Linux kernel, the following vulnerability has been resolved:
nvmem: Fix shift-out-of-bound (UBSAN) with byte size cells
If a cell has 'nbits'
ghsa_unreviewed·2024-05-22
CVE-2021-47497 [HIGH] CWE-787 GHSA-vgjx-6ccw-c3f6: In the Linux kernel, the following vulnerability has been resolved:
nvmem: Fix shift-out-of-bound (UBSAN) with byte size cells
If a cell has 'nbits'
In the Linux kernel, the following vulnerability has been resolved:
nvmem: Fix shift-out-of-bound (UBSAN) with byte size cells
If a cell has 'nbits' equal to a multiple of BITS_PER_BYTE the logic
*p &= GENMASK((cell->nbits%BITS_PER_BYTE) - 1, 0);
will become undefined behavior because nbits modulo BITS_PER_BYTE is 0, and we
subtract one from that making a large number that is then shifted more than the
number of bits that fit into an unsigned long.
UBSAN reports this problem:
UBSAN: shift-out-of-bounds in drivers/nvmem/core.c:1386:8
shift exponent 64 is too large for 64-bit type 'unsigned long'
CPU: 6 PID: 7 Comm: kworker/u16:0 Not tainted 5.15.0-rc3+ #9
Hardware name: Google Lazor (rev3+) with KB Backlight (DT)
Workqueue: events_unbound deferred_probe_work_func
Call trace:
dump_back
OSV
CVE-2021-47497: In the Linux kernel, the following vulnerability has been resolved: nvmem: Fix shift-out-of-bound (UBSAN) with byte size cells If a cell has 'nbits' e
osv·2024-05-22·CVSS 7.8
CVE-2021-47497 [HIGH] CVE-2021-47497: In the Linux kernel, the following vulnerability has been resolved: nvmem: Fix shift-out-of-bound (UBSAN) with byte size cells If a cell has 'nbits' e
In the Linux kernel, the following vulnerability has been resolved: nvmem: Fix shift-out-of-bound (UBSAN) with byte size cells If a cell has 'nbits' equal to a multiple of BITS_PER_BYTE the logic *p &= GENMASK((cell->nbits%BITS_PER_BYTE) - 1, 0); will become undefined behavior because nbits modulo BITS_PER_BYTE is 0, and we subtract one from that making a large number that is then shifted more than the number of bits that fit into an unsigned long. UBSAN reports this problem: UBSAN: shift-out-of-bounds in drivers/nvmem/core.c:1386:8 shift exponent 64 is too large for 64-bit type 'unsigned long' CPU: 6 PID: 7 Comm: kworker/u16:0 Not tainted 5.15.0-rc3+ #9 Hardware name: Google Lazor (rev3+) with KB Backlight (DT) Workqueue: events_unbound deferred_probe_work_func Call trace: dump_backtrace+
Red Hat
kernel: nvmem: Fix shift-out-of-bound (UBSAN) with byte size cells
vendor_redhat·2024-05-22·CVSS 7.8
CVE-2021-47497 [HIGH] CWE-125 kernel: nvmem: Fix shift-out-of-bound (UBSAN) with byte size cells
kernel: nvmem: Fix shift-out-of-bound (UBSAN) with byte size cells
In the Linux kernel, the following vulnerability has been resolved:
nvmem: Fix shift-out-of-bound (UBSAN) with byte size cells
If a cell has 'nbits' equal to a multiple of BITS_PER_BYTE the logic
*p &= GENMASK((cell->nbits%BITS_PER_BYTE) - 1, 0);
will become undefined behavior because nbits modulo BITS_PER_BYTE is 0, and we
subtract one from that making a large number that is then shifted more than the
number of bits that fit into an unsigned long.
UBSAN reports this problem:
UBSAN: shift-out-of-bounds in drivers/nvmem/core.c:1386:8
shift exponent 64 is too large for 64-bit type 'unsigned long'
CPU: 6 PID: 7 Comm: kworker/u16:0 Not tainted 5.15.0-rc3+ #9
Hardware name: Google Lazor (rev3+) with KB Backlight (DT)
Workqueue:
Debian
CVE-2021-47497: linux - In the Linux kernel, the following vulnerability has been resolved: nvmem: Fix ...
vendor_debian·2021·CVSS 7.8
CVE-2021-47497 [HIGH] CVE-2021-47497: linux - In the Linux kernel, the following vulnerability has been resolved: nvmem: Fix ...
In the Linux kernel, the following vulnerability has been resolved: nvmem: Fix shift-out-of-bound (UBSAN) with byte size cells If a cell has 'nbits' equal to a multiple of BITS_PER_BYTE the logic *p &= GENMASK((cell->nbits%BITS_PER_BYTE) - 1, 0); will become undefined behavior because nbits modulo BITS_PER_BYTE is 0, and we subtract one from that making a large number that is then shifted more than the number of bits that fit into an unsigned long. UBSAN reports this problem: UBSAN: shift-out-of-bounds in drivers/nvmem/core.c:1386:8 shift exponent 64 is too large for 64-bit type 'unsigned long' CPU: 6 PID: 7 Comm: kworker/u16:0 Not tainted 5.15.0-rc3+ #9 Hardware name: Google Lazor (rev3+) with KB Backlight (DT) Workqueue: events_unbound deferred_probe_work_func Call trace: dump_backtrace+
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/0594f1d048d8dc338eb9a240021b1d00ae1eb082https://git.kernel.org/stable/c/0e822e5413da1af28cca350cb1cb42b6133bdcaehttps://git.kernel.org/stable/c/2df6c023050205c4d04ffc121bc549f65cb8d1dfhttps://git.kernel.org/stable/c/57e48886401b14cd351423fabfec2cfd18df4f66https://git.kernel.org/stable/c/5d388fa01fa6eb310ac023a363a6cb216d9d8fe9https://git.kernel.org/stable/c/60df06bbdf497e37ed25ad40572c362e5b0998dfhttps://git.kernel.org/stable/c/abcb8d33e4d2215ccde5ab5ccf9f730a59d79d97https://git.kernel.org/stable/c/eb0fc8e7170e61eaf65d28dee4a8baf4e86b19cahttps://git.kernel.org/stable/c/0594f1d048d8dc338eb9a240021b1d00ae1eb082https://git.kernel.org/stable/c/0e822e5413da1af28cca350cb1cb42b6133bdcaehttps://git.kernel.org/stable/c/2df6c023050205c4d04ffc121bc549f65cb8d1dfhttps://git.kernel.org/stable/c/57e48886401b14cd351423fabfec2cfd18df4f66https://git.kernel.org/stable/c/5d388fa01fa6eb310ac023a363a6cb216d9d8fe9https://git.kernel.org/stable/c/60df06bbdf497e37ed25ad40572c362e5b0998dfhttps://git.kernel.org/stable/c/abcb8d33e4d2215ccde5ab5ccf9f730a59d79d97https://git.kernel.org/stable/c/eb0fc8e7170e61eaf65d28dee4a8baf4e86b19ca
2024-05-22
Published