CVE-2026-93828

exfat: fix handling of damaged volume in exfat_create_upcase_table()

State: Published
Severity: Not scored
Published: Sep 24, 2026
Updated: Oct 30, 2026
Reserved: Sep 18, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

exfat: fix handling of damaged volume in exfat_create_upcase_table()

When the size of the upcase table is set to zero in the dentry for any reason(e.g. corrupted media or misbehaving device), an integer overflow causes the module to loop indefinitely.

If the size of the upcase table is read zero, do not attempt to load the table. Instead, fallback to loading the default upcase table. If the size of the upcase table is zero or no upcase table is found, raise exfat_fs_error() to mark the volume read-only.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	370e812b3ec190fa492c9fd5a80c38b086d105c0 to before 091ca992218105a050af0b863337e02a2d518b2fAffected 370e812b3ec190fa492c9fd5a80c38b086d105c0 to before 29723256fccf46e55c2a44bd6b8345bef7ba079bAffected 370e812b3ec190fa492c9fd5a80c38b086d105c0 to before 60ace93811609e4dd883e9de5fb4462ed834160aAffected 370e812b3ec190fa492c9fd5a80c38b086d105c0 to before 2cc0b612343638057ef321ce735201a7c2f52f25Affected 370e812b3ec190fa492c9fd5a80c38b086d105c0 to before 20dd3185d13865214ff25b0bf7b931e8d73be1acAffected
LinuxLinux	5.7Affected before 5.7Not affected 6.1.191 through 6.1.Not affected 6.6.160 through 6.6.Not affected 6.12.111 through 6.12.Not affected 6.18.53 through 6.18.Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

370e812b3ec190fa492c9fd5a80c38b086d105c0 to before 091ca992218105a050af0b863337e02a2d518b2fAffected
370e812b3ec190fa492c9fd5a80c38b086d105c0 to before 29723256fccf46e55c2a44bd6b8345bef7ba079bAffected
370e812b3ec190fa492c9fd5a80c38b086d105c0 to before 60ace93811609e4dd883e9de5fb4462ed834160aAffected
370e812b3ec190fa492c9fd5a80c38b086d105c0 to before 2cc0b612343638057ef321ce735201a7c2f52f25Affected
370e812b3ec190fa492c9fd5a80c38b086d105c0 to before 20dd3185d13865214ff25b0bf7b931e8d73be1acAffected

LinuxLinux

5.7Affected
before 5.7Not affected
6.1.191 through 6.1.*Not affected
6.6.160 through 6.6.*Not affected
6.12.111 through 6.12.*Not affected
6.18.53 through 6.18.*Not affected
7.2 and laterNot affected

References

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