usb: gadget: f_fs: Fix epfile null pointer access after ep enable. (Linux Linux)

CVE-2025-40315
Non disponible

En bref

Source
NVD
EPSS
EPSS 0.20 % · centile 10 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Deferred

Description

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_fs: Fix epfile null pointer access after ep enable. A race condition occurs when ffs_func_eps_enable() runs concurrently with ffs_data_reset(). The ffs_data_clear() called in ffs_data_reset() sets ffs->epfiles to NULL before resetting ffs->eps_count to 0, leading to a NULL pointer dereference when accessing epfile->ep in ffs_func_eps_enable() after successful usb_ep_enable(). The ffs->epfiles pointer is set to NULL in both ffs_data_clear() and ffs_data_close() functions, and its modification is protected by the spinlock ffs->eps_lock. And the whole ffs_func_eps_enable() function is also protected by ffs->eps_lock. Thus, add NULL pointer handling for ffs->epfiles in the ffs_func_eps_enable() function to fix issues

Références

Références européennes

Avis du CERT-FR

Produits affectés

ProduitVersions
Linux · Linuxaffected c9fc422c9a43e3d58d246334a71f3390401781dc < b00d2572c16e8e59e979960d3383c2ae9cebd195 ; affected 0042178a69eb77a979e36a50dcce9794a3140ef8 < 1c0dbd240be3f87cac321b14e17979b7e9cb6a8f ; affected 72a8aee863af099d4434314c4536d6c9a61dcf3c < 9ec40fba7357df2d36f4c2e2f3b9b1a4fba0a272 ; affected ebe2b1add1055b903e2acd86b290a85297edc0b3 < c53e90563bc148e4e0ad09fe130ba2246d426ea6 ; affected ebe2b1add1055b903e2acd86b290a85297edc0b3 < fc1141a530dfc91f0ee19b7f422a2d24829584bc ; affected ebe2b1add1055b903e2acd86b290a85297edc0b3 < d62b808d5c68a931ad0849a00a5e3be3dd7e0019
Linux · Linuxaffected 5.17 ; unaffected 0 < 5.17 ; unaffected 5.4.302 ≤ 5.4.* ; unaffected 5.10.247 ≤ 5.10.* ; unaffected 5.15.197 ≤ 5.15.* ; unaffected 6.1.159 ≤ 6.1.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD