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CVE-2024-47677: exfat: resolve memory leak from exfat_create_upcase_table()

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-10-21 · updated 2026-06-17
• Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: exfat: resolve memory leak from exfat_create_upcase_table() If exfat_load_upcase_table reaches end and returns -EINVAL, allocated memory doesn't get freed and while exfat_load_default_upcase_table allocates more memory, leading to a memory leak. Here's link to syzkaller crash report illustrating this issue: https://syzkaller.appspot.com/text?tag=CrashReport&x=1406c201980000

Affected products

• Linux kernel: from 6.8 before 6.10.13; from 6.11 before 6.11.2 — fixed in 6.10.13, 6.11.2

How to fix

Upgrade to a fixed version: Linux kernel 6.10.13, 6.11.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/331ed2c739ce656a67865f6b3ee0a478349d78cb
• https://git.kernel.org/stable/c/c290fe508eee36df1640c3cb35dc8f89e073c8a8
• https://git.kernel.org/stable/c/f9835aec49670c46ebe2973032caaa1043b3d4da

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