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CVE-2023-54021

UnknownEPSS 0.17%

Last modified

CVE-2023-54021 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: ext4: set goal start correctly in ext4_mb_normalize_request We need to set ac_g_ex to notify the goal start used in ext4_mb_find_by_goal. Set ac_g_ex instead of ac_f_ex in ext4_mb_normalize_request. Besides we should assure goal start is in range [first_data_block, blocks_count) as ext4_mb_initialize_context does. [ Added a check to make sure size is less than ar->pright; otherwise we could end up passing an underflowed value of ar->pright - size to ext4_get_group_no_and_offset(), which will trigger a BUG_ON later on. - TYT ]. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: ext4: set goal start correctly in ext4_mb_normalize_request We need to set ac_g_ex to notify the goal start used in ext4_mb_find_by_goal. Set ac_g_ex instead of ac_f_ex in ext4_mb_normalize_request. Besides we should assure goal start is in range [first_data_block, blocks_count) as ext4_mb_initialize_context does. [ Added a check to make sure size is less than ar->pright; otherwise we could end up passing an underflowed value of ar->pright - size to ext4_get_group_no_and_offset(), which will trigger a BUG_ON later on. - TYT ]

Metrics

EPSS Probability
0.17%

6.1th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= c9de560ded61faa5b754137b7753da252391c55a, < 2479bb6cbdb4d56b807bbe5229e3e26a6f1f4530; >= c9de560ded61faa5b754137b7753da252391c55a, < 390eee955d4de4662db5e3e9e9a9eae020432cb7; >= c9de560ded61faa5b754137b7753da252391c55a, < cee78217a7ae72d11c2e21e1a5263b8044489823; >= c9de560ded61faa5b754137b7753da252391c55a, < 3ca3005b502ca8ea87d6a344323b179b48c4e4a3; >= c9de560ded61faa5b754137b7753da252391c55a, < bc4a3e1d07a86ae5845321d371190244acacb2f2; >= c9de560ded61faa5b754137b7753da252391c55a, < c6bee8970075b256fc1b07bf4873049219380818; >= c9de560ded61faa5b754137b7753da252391c55a, < abb330ffaa3a0ae7ce632e28c9260b461c01f19f; >= c9de560ded61faa5b754137b7753da252391c55a, < b07ffe6927c75d99af534d685282ea188d9f71a6
LinuxLinux2.6.25

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is CVE-2023-54021?
In the Linux kernel, the following vulnerability has been resolved: ext4: set goal start correctly in ext4_mb_normalize_request We need to set ac_g_ex to notify the goal start used in ext4_mb_find_by_goal. Set ac_g_ex instead of ac_f_ex in ext4_mb_normalize_request. Besides we should assure goal start is in range [first_data_block, blocks_count) as ext4_mb_initialize_context does. [ Added a check to make sure size is less than ar->pright; otherwise we could end up passing an underflowed value of ar->pright - size to ext4_get_group_no_and_offset(), which will trigger a BUG_ON later on. - TYT ]
How severe is CVE-2023-54021?
Severity scoring for CVE-2023-54021 is pending analysis. The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.
How do I fix CVE-2023-54021?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST