Mirrors/esp-idf
1
0
Fork 0
mirror of https://github.com/espressif/esp-idf.git synced 2026-09-22 13:01:16 +03:00
Code Issues Packages Projects Releases Wiki Activity

fix(storage/fatfs): record non-applicable runZero 2026 CVEs in SBOM

Browse Source 
Document the three runZero "Seven FatFs bugs" CVEs that require no source change
in this component, so vulnerability scanners have their disposition:

  - CVE-2026-6684: GPT partition-scan loop DoS. Already fixed upstream in R0.16,
    where test_gpt_header() caps the partition-entry count at 128.
  - CVE-2026-6686: read of uninitialized clusters after f_lseek() past EOF.
    Longstanding, behavioral; not a memory-safety defect and zero-filling every
    extended cluster is prohibitively costly on flash.
  - CVE-2026-6688: long-filename overflow in downstream callers. Not exposed in
    ESP-IDF; vfs_fat.c uses bounded copies and fname is bounded by FF_MAX_LFN.

Reference: https://www.runzero.com/blog/fatfs-bugs/
This commit is contained in:
Tomáš Rohlínek
2026-07-06 13:39:24 +02:00
committed by BOT
parent 1364005a2e
commit e9d404254b
1 changed files with 6 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
components/fatfs/sbom.yml
View File

@@ -12,3 +12,9 @@ cve-exclude-list:
reason: Unsigned-subtraction wrap in the dirty-cache refill check. Patched by requiring the cached sector to lie within the direct-I/O range in both f_write() and f_read().
- cve: CVE-2026-6687
reason: exFAT label-length overflow in f_getlabel(). Patched by clamping XDIR_NumLabel to the 11-unit exFAT label maximum.
- cve: CVE-2026-6684
reason: GPT partition-scan loop DoS, classified by runZero as pre-R0.16 because the protective GPT validation was added upstream in R0.16. This release does not ship the R0.16 baseline; it ships FatFs R0.15 with Espressif patch2, which already backports that validation. test_gpt_header() checks the GPT header size, CRC and entry size and rejects any partition table declaring more than 128 entries before the scan loop runs, so the unbounded-scan condition is unreachable. An unpatched upstream R0.15 (without patch2) would remain vulnerable.
- cve: CVE-2026-6686
reason: Read of uninitialized clusters after f_lseek() extends a file past EOF. Longstanding FatFs behavior; not a memory-safety defect and zero-filling every extended cluster is prohibitively costly on flash. Applications sharing media across trust boundaries must zero regions before exposing them.
- cve: CVE-2026-6688
reason: Long-filename overflow in downstream callers copying FILINFO.fname. Not exposed in ESP-IDF; vfs_fat.c uses bounded snprintf/strlcpy and fname is bounded in-library by FF_MAX_LFN.