exfat: fix handling of damaged volume in exfat_create_upcase_table()
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.
CVE-2026-93828
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-93828
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "370e812b3ec190fa492c9fd5a80c38b086d105c0",
"lessThan": "29723256fccf46e55c2a44bd6b8345bef7ba079b",
"versionType": "git"
},
{
"status": "affected",
"version": "370e812b3ec190fa492c9fd5a80c38b086d105c0",
"lessThan": "60ace93811609e4dd883e9de5fb4462ed834160a",
"versionType": "git"
},
{
"status": "affected",
"version": "370e812b3ec190fa492c9fd5a80c38b086d105c0",
"lessThan": "2cc0b612343638057ef321ce735201a7c2f52f25",
"versionType": "git"
},
{
"status": "affected",
"version": "370e812b3ec190fa492c9fd5a80c38b086d105c0",
"lessThan": "20dd3185d13865214ff25b0bf7b931e8d73be1ac",
"versionType": "git"
}
],
"programFiles": [
"fs/exfat/nls.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.7"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.7",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.111",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/exfat/nls.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-93828
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48753 · Revision 1
- Added to Heist Feed
- Publisher date