CVE-2026-63808

A flaw was found in the Linux kernel's exFAT filesystem driver. A local attacker could exploit a use-after-free vulnerability in the exfatfinddirentry function. This occurs because a buffer is prematurely released while still being referenced, which can be triggered by processing a specially...

SUSE CVE-2026-63808

In the Linux kernel, the following vulnerability has been resolved: exfat: fix potential use-after-free in exfatfinddirentry In exfatfinddirentry, the bufferhead obtained from exfatgetdentry is released with brelsebh before the fall-through TYPEEXTEND branch reads the directory entry through ep...

CVE-2026-63808

In the Linux kernel, the following vulnerability has been resolved: exfat: fix potential use-after-free in exfatfinddirentry In exfatfinddirentry, the bufferhead obtained from exfatgetdentry is released with brelsebh before the fall-through TYPEEXTEND branch reads the directory entry through ep...

CVE-2026-63808 exfat: fix potential use-after-free in exfat_find_dir_entry()

In the Linux kernel, the following vulnerability has been resolved: exfat: fix potential use-after-free in exfatfinddirentry In exfatfinddirentry, the bufferhead obtained from exfatgetdentry is released with brelsebh before the fall-through TYPEEXTEND branch reads the directory entry through ep...

CVE-2026-63808

In the Linux kernel, the following vulnerability has been resolved: exfat: fix potential use-after-free in exfatfinddirentry In exfatfinddirentry, the bufferhead obtained from exfatgetdentry is released with brelsebh before the fall-through TYPEEXTEND branch reads the directory entry through ep...

CVE-2026-63808

CVE-2026-63808 (Linux kernel exFAT): The vulnerability is a potential use-after-free in exfat_find_dir_entry() where a buffer_head is freed before all reads on the TYPE_EXTEND path, leading to a read from invalid memory. The root cause is brelse(bh) occurring before ep is no longer dereferenced; ...

CVE-2026-63808

In the Linux kernel, the following vulnerability has been resolved: exfat: fix potential use-after-free in exfatfinddirentry In exfatfinddirentry, the bufferhead obtained from exfatgetdentry is released with brelsebh before the fall-through TYPEEXTEND branch reads the directory entry through ep...

EUVD-2026-45474

In the Linux kernel, the following vulnerability has been resolved: exfat: fix potential use-after-free in exfatfinddirentry In exfatfinddirentry, the bufferhead obtained from exfatgetdentry is released with brelsebh before the fall-through TYPEEXTEND branch reads the directory entry through ep...

CVE-2026-63808 exfat: fix potential use-after-free in exfat_find_dir_entry()

In the Linux kernel, the following vulnerability has been resolved: exfat: fix potential use-after-free in exfatfinddirentry In exfatfinddirentry, the bufferhead obtained from exfatgetdentry is released with brelsebh before the fall-through TYPEEXTEND branch reads the directory entry through ep...

PT-2026-61124

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A use-after-free issue exists in the exfat find dir entry function. The problem occurs when a buffer head obtained from exfat get dentry is released using brelsebh before the TYPE EXTEND...

Linux Distros Unpatched Vulnerability : CVE-2026-63808

"The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - exfat: fix potential use-after-free in exfatfinddirentry In exfatfinddirentry, the bufferhead obtained from exfatgetdentry is released with brelsebh before the...

CVE-2026-6687

FatFs R0.16 and earlier contains a stack overflow bug in fgetlabel because exFAT label length XDIRNumLabel is trusted without enforcing spec maximums. This maps to CWE-121 Stack-based Buffer Overflow. Estimated CVSS v3.1 vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H 7.6, High. The estimate...

CVE-2026-6683

FatFs R0.16 and earlier contains a divide-by-zero in exFAT sync logic bug when crafted metadata causes nfatent - 2 to be zero during write/sync operations. This maps to CWE-369 Divide By Zero. Estimated CVSS v3.1 vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 4.6, Medium. Network-delivered...

EUVD-2026-40999

FatFs R0.16 and earlier contains a stack overflow bug in fgetlabel because exFAT label length XDIRNumLabel is trusted without enforcing spec maximums. This maps to CWE-121 Stack-based Buffer Overflow. Estimated CVSS v3.1 vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H 7.6, High. The estimate...

CVE-2026-6687

FatFs R0.16 and earlier contains a stack overflow bug in fgetlabel because exFAT label length XDIRNumLabel is trusted without enforcing spec maximums. This maps to CWE-121 Stack-based Buffer Overflow. Estimated CVSS v3.1 vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H 7.6, High. The estimate...

CVE-2026-6687

CVE-2026-6687 affects FatFs R0.16 and earlier. Root cause: f_getlabel() trusts exFAT label length (XDIR_NumLabel) beyond the spec maximums, causing a stack-based buffer overflow (CWE-121). Documented impact per CVSS: high for confidentiality, integrity, and availability. Exploitation status is no...

CVE-2026-6683

CVE-2026-6683 describes a divide-by-zero in FatFs exFAT sync for FatFs R0.16 and earlier. The bug arises when crafted metadata causes the expression n_fatent - 2 to be zero during write/sync, mapping to CWE-369 (Divide By Zero). The vulnerability is applicable to FatFs versions ending at R0.16 an...

EUVD-2026-40993

FatFs R0.16 and earlier contains a divide-by-zero in exFAT sync logic bug when crafted metadata causes nfatent - 2 to be zero during write/sync operations. This maps to CWE-369 Divide By Zero. Estimated CVSS v3.1 vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 4.6, Medium. Network-delivered...

PT-2026-54925

Name of the Vulnerable Software and Affected Versions FatFs versions R0.16 and earlier Description A divide-by-zero issue exists in the exFAT sync logic. This occurs during write or sync operations when crafted metadata causes the calculation n fatent - 2 to result in zero. Divide-by-zero is a...

PT-2026-54929

Name of the Vulnerable Software and Affected Versions FatFs versions R0.16 and earlier Description A stack-based buffer overflow occurs in the f getlabel function. This issue arises because the exFAT label length XDIR NumLabel is trusted without enforcing the maximum limits defined by the...