CVE-2022-49172
parisc: Fix non-access data TLB cache flush faults
Summary
Descriptions
In the Linux kernel, the following vulnerability has been resolved: parisc: Fix non-access data TLB cache flush faults When a page is not present, we get non-access data TLB faults from
the fdc and fic instructions in flush_user_dcache_range_asm and
flush_user_icache_range_asm. When these occur, the cache line is
not invalidated and potentially we get memory corruption. The
problem was hidden by the nullification of the flush instructions. These faults also affect performance. With pa8800/pa8900 processors,
there will be 32 faults per 4 KB page since the cache line is 128
bytes. There will be more faults with earlier processors. The problem is fixed by using flush_cache_pages(). It does the flush
using a tmp alias mapping. The flush_cache_pages() call in flush_cache_range() flushed too
large a range. V2: Remove unnecessary preempt_disable() and preempt_enable() calls.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2025-02-26 CVE Reserved
- 2025-02-26 CVE Published
- 2025-02-26 CVE Updated
- ---------- EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
Threat Intelligence Resources (0)
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References (3)
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Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
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| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | < 5.16.19 Search vendor "Linux" for product "Linux Kernel" and version " < 5.16.19" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | < 5.17.2 Search vendor "Linux" for product "Linux Kernel" and version " < 5.17.2" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | < 5.18 Search vendor "Linux" for product "Linux Kernel" and version " < 5.18" | en |
Affected
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