CVE-2021-47623
published 2024-07-16CVE-2021-47623: In the Linux kernel, the following vulnerability has been resolved: powerpc/fixmap: Fix VM debug warning on unmap Unmapping a fixmap entry is done by calling…
PriorityP418medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.22%
13.2th percentile
In the Linux kernel, the following vulnerability has been resolved:
powerpc/fixmap: Fix VM debug warning on unmap
Unmapping a fixmap entry is done by calling __set_fixmap()
with FIXMAP_PAGE_CLEAR as flags.
Today, powerpc __set_fixmap() calls map_kernel_page().
map_kernel_page() is not happy when called a second time
for the same page.
WARNING: CPU: 0 PID: 1 at arch/powerpc/mm/pgtable.c:194 set_pte_at+0xc/0x1e8
CPU: 0 PID: 1 Comm: swapper Not tainted 5.16.0-rc3-s3k-dev-01993-g350ff07feb7d-dirty #682
NIP: c0017cd4 LR: c00187f0 CTR: 00000010
REGS: e1011d50 TRAP: 0700 Not tainted (5.16.0-rc3-s3k-dev-01993-g350ff07feb7d-dirty)
MSR: 00029032 CR: 42000208 XER: 00000000
GPR00: c0165fec e1011e10 c14c0000 c0ee2550 ff800000 c0f3d000 00000000 c001686c
GPR08: 00001000 b00045a9 00000001 c0f58460 c0f50000 00000000 c0007e10 00000000
GPR16: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
GPR24: 00000000 00000000 c0ee2550 00000000 c0f57000 00000ff8 00000000 ff800000
NIP [c0017cd4] set_pte_at+0xc/0x1e8
LR [c00187f0] map_kernel_page+0x9c/0x100
Call Trace:
[e1011e10] [c0736c68] vsnprintf+0x358/0x6c8 (unreliable)
[e1011e30] [c0165fec] __set_fixmap+0x30/0x44
[e1011e40] [c0c13bdc] early_iounmap+0x11c/0x170
[e1011e70] [c0c06cb0] ioremap_legacy_serial_console+0x88/0xc0
[e1011e90] [c0c03634] do_one_initcall+0x80/0x178
[e1011ef0] [c0c0385c] kernel_init_freeable+0xb4/0x250
[e1011f20] [c0007e34] kernel_init+0x24/0x140
[e1011f30] [c0016268] ret_from_kernel_thread+0x5c/0x64
Instruction dump:
7fe3fb78 48019689 80010014 7c630034 83e1000c 5463d97e 7c0803a6 38210010
4e800020 81250000 712a0001 41820008 9421ffe0 93e1001c 48000030
Implement unmap_kernel_page() which clears an existing pte.
Affected
14 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 5.16.10-1 (bookworm) | linux 5.16.10-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= 265c3491c4bc8d40587996d6ee2f447a7ccfb4f3 < 67baac10dd5ad1e9f50e8f2659984b3b0728d54e | 67baac10dd5ad1e9f50e8f2659984b3b0728d54e |
| linux | linux | >= 265c3491c4bc8d40587996d6ee2f447a7ccfb4f3 < 43ae0ccc4d2722b833fb59b905af129428e06d03 | 43ae0ccc4d2722b833fb59b905af129428e06d03 |
| linux | linux | >= 265c3491c4bc8d40587996d6ee2f447a7ccfb4f3 < 033fd42c18d9b2121595b6f1e8419a115f9ac5b7 | 033fd42c18d9b2121595b6f1e8419a115f9ac5b7 |
| linux | linux | >= 265c3491c4bc8d40587996d6ee2f447a7ccfb4f3 < aec982603aa8cc0a21143681feb5f60ecc69d718 | aec982603aa8cc0a21143681feb5f60ecc69d718 |
| linux | linux_kernel | < 5.10.101 | 5.10.101 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 5.10.103-1 | 5.10.103-1 |
| linux | linux_kernel | >= 0 < 5.16.10-1 | 5.16.10-1 |
| linux | linux_kernel | >= 0 < 5.16.10-1 | 5.16.10-1 |
| linux | linux_kernel | >= 0 < 5.16.10-1 | 5.16.10-1 |
| linux | linux_kernel | >= 5.11 < 5.15.24 | 5.15.24 |
| linux | linux_kernel | >= 5.16 < 5.16.10 | 5.16.10 |
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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Red Hat
kernel: powerpc/fixmap: Fix VM debug warning on unmap
vendor_redhat·2024-07-16·CVSS 5.5
CVE-2021-47623 [MEDIUM] CWE-99 kernel: powerpc/fixmap: Fix VM debug warning on unmap
kernel: powerpc/fixmap: Fix VM debug warning on unmap
In the Linux kernel, the following vulnerability has been resolved:
powerpc/fixmap: Fix VM debug warning on unmap
Unmapping a fixmap entry is done by calling __set_fixmap()
with FIXMAP_PAGE_CLEAR as flags.
Today, powerpc __set_fixmap() calls map_kernel_page().
map_kernel_page() is not happy when called a second time
for the same page.
WARNING: CPU: 0 PID: 1 at arch/powerpc/mm/pgtable.c:194 set_pte_at+0xc/0x1e8
CPU: 0 PID: 1 Comm: swapper Not tainted 5.16.0-rc3-s3k-dev-01993-g350ff07feb7d-dirty #682
NIP: c0017cd4 LR: c00187f0 CTR: 00000010
REGS: e1011d50 TRAP: 0700 Not tainted (5.16.0-rc3-s3k-dev-01993-g350ff07feb7d-dirty)
MSR: 00029032 CR: 42000208 XER: 00000000
GPR00: c0165fec e1011e10 c14c0000 c0ee2550 ff800000 c0f3d000 00000000 c001
Debian
CVE-2021-47623: linux - In the Linux kernel, the following vulnerability has been resolved: powerpc/fix...
vendor_debian·2021·CVSS 5.5
CVE-2021-47623 [MEDIUM] CVE-2021-47623: linux - In the Linux kernel, the following vulnerability has been resolved: powerpc/fix...
In the Linux kernel, the following vulnerability has been resolved: powerpc/fixmap: Fix VM debug warning on unmap Unmapping a fixmap entry is done by calling __set_fixmap() with FIXMAP_PAGE_CLEAR as flags. Today, powerpc __set_fixmap() calls map_kernel_page(). map_kernel_page() is not happy when called a second time for the same page. WARNING: CPU: 0 PID: 1 at arch/powerpc/mm/pgtable.c:194 set_pte_at+0xc/0x1e8 CPU: 0 PID: 1 Comm: swapper Not tainted 5.16.0-rc3-s3k-dev-01993-g350ff07feb7d-dirty #682 NIP: c0017cd4 LR: c00187f0 CTR: 00000010 REGS: e1011d50 TRAP: 0700 Not tainted (5.16.0-rc3-s3k-dev-01993-g350ff07feb7d-dirty) MSR: 00029032 CR: 42000208 XER: 00000000 GPR00: c0165fec e1011e10 c14c0000 c0ee2550 ff800000 c0f3d000 00000000 c001686c GPR08: 00001000 b00045a9 00000001 c0f58460 c0f5000
GHSA
GHSA-cm9w-2x7j-gc65: In the Linux kernel, the following vulnerability has been resolved:
powerpc/fixmap: Fix VM debug warning on unmap
Unmapping a fixmap entry is done b
ghsa_unreviewed·2024-07-16
CVE-2021-47623 [MEDIUM] GHSA-cm9w-2x7j-gc65: In the Linux kernel, the following vulnerability has been resolved:
powerpc/fixmap: Fix VM debug warning on unmap
Unmapping a fixmap entry is done b
In the Linux kernel, the following vulnerability has been resolved:
powerpc/fixmap: Fix VM debug warning on unmap
Unmapping a fixmap entry is done by calling __set_fixmap()
with FIXMAP_PAGE_CLEAR as flags.
Today, powerpc __set_fixmap() calls map_kernel_page().
map_kernel_page() is not happy when called a second time
for the same page.
WARNING: CPU: 0 PID: 1 at arch/powerpc/mm/pgtable.c:194 set_pte_at+0xc/0x1e8
CPU: 0 PID: 1 Comm: swapper Not tainted 5.16.0-rc3-s3k-dev-01993-g350ff07feb7d-dirty #682
NIP: c0017cd4 LR: c00187f0 CTR: 00000010
REGS: e1011d50 TRAP: 0700 Not tainted (5.16.0-rc3-s3k-dev-01993-g350ff07feb7d-dirty)
MSR: 00029032 CR: 42000208 XER: 00000000
GPR00: c0165fec e1011e10 c14c0000 c0ee2550 ff800000 c0f3d000 00000000 c001686c
GPR08: 00001000 b00045a9 00000001 c0f58460 c
OSV
CVE-2021-47623: In the Linux kernel, the following vulnerability has been resolved: powerpc/fixmap: Fix VM debug warning on unmap Unmapping a fixmap entry is done by
osv·2024-07-16·CVSS 5.5
CVE-2021-47623 [MEDIUM] CVE-2021-47623: In the Linux kernel, the following vulnerability has been resolved: powerpc/fixmap: Fix VM debug warning on unmap Unmapping a fixmap entry is done by
In the Linux kernel, the following vulnerability has been resolved: powerpc/fixmap: Fix VM debug warning on unmap Unmapping a fixmap entry is done by calling __set_fixmap() with FIXMAP_PAGE_CLEAR as flags. Today, powerpc __set_fixmap() calls map_kernel_page(). map_kernel_page() is not happy when called a second time for the same page. WARNING: CPU: 0 PID: 1 at arch/powerpc/mm/pgtable.c:194 set_pte_at+0xc/0x1e8 CPU: 0 PID: 1 Comm: swapper Not tainted 5.16.0-rc3-s3k-dev-01993-g350ff07feb7d-dirty #682 NIP: c0017cd4 LR: c00187f0 CTR: 00000010 REGS: e1011d50 TRAP: 0700 Not tainted (5.16.0-rc3-s3k-dev-01993-g350ff07feb7d-dirty) MSR: 00029032 CR: 42000208 XER: 00000000 GPR00: c0165fec e1011e10 c14c0000 c0ee2550 ff800000 c0f3d000 00000000 c001686c GPR08: 00001000 b00045a9 00000001 c0f58460 c0f5000
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://git.kernel.org/stable/c/033fd42c18d9b2121595b6f1e8419a115f9ac5b7https://git.kernel.org/stable/c/43ae0ccc4d2722b833fb59b905af129428e06d03https://git.kernel.org/stable/c/67baac10dd5ad1e9f50e8f2659984b3b0728d54ehttps://git.kernel.org/stable/c/aec982603aa8cc0a21143681feb5f60ecc69d718https://git.kernel.org/stable/c/033fd42c18d9b2121595b6f1e8419a115f9ac5b7https://git.kernel.org/stable/c/43ae0ccc4d2722b833fb59b905af129428e06d03https://git.kernel.org/stable/c/67baac10dd5ad1e9f50e8f2659984b3b0728d54ehttps://git.kernel.org/stable/c/aec982603aa8cc0a21143681feb5f60ecc69d718
2024-07-16
Published