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CVE-2026-64427

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.1%
Linux•Linux•Versions : ce2a731c179df8869e1969a1b2b5b9e4e1c25f8b, eeb5ad388595ca2b6624689198a057847f3a3e19, <1215febd644c3e16f77e0f1799d89544dd57a754, <7a89ad762fad53d56b7002d7ffc923a4b7f4006f, <590cc4d782487632a52f37c2171bee1eeea29627, 0, <6f7f22a8d244c2e586b8eb61c7585784b62aea01, <=7.1.*, 7.1.4, <f3790a6af9c7f47d454225cab9dc145270e48f62, <7.1, bc3bba4656ad280267ea78cf845ab6b1d95b9fcd, <80c1e18473f63fd7c6a2bc9ad6f3d0a6cc4fb500, <95b3f23d632490b5eb285b9fcf7284f2ac8f9872, 7.1, 7754ade02d0fb1caf20392baf4e02937378fd136, <=*, <2b70bebc709489d29a31ac2935aeffb8d5228395, 968e84f5c0dca4960580d174500e4bbf0c45dc15, b6a57912854e7ea36f3b270032661140cc4209cd, 2ed9638cfbf9d49bdef9b0f5ee547236c2c2f500, 7.2

Description

In the Linux kernel, the following vulnerability has been resolved: HID: logitech-dj: Fix maxfield check in DJ short report validation Commit b6a57912854e ("HID: logitech-dj: Prevent REPORT_ID_DJ_SHORT related user initiated OOB write") added validation for the DJ short output report, but the error path dereferences rep->field[0] even when rep->maxfield is zero. Commit 8b9a097eb2fc ("HID: logitech-dj: fix wrong detection of bad DJ_SHORT output report") made the check conditional on rep being present, but a crafted descriptor can still create report ID 0x20 with only padding output items. hid-core registers the report, ignores the padding field, and leaves rep->maxfield as zero. In that case the validation enters the rep->maxfield < 1 branch and then dereferences rep->field[0]->report_count while printing the error message, causing a NULL pointer dereference during probe. This is reproducible with uhid by emulating a Logitech receiver with a padding-only DJ short output report: BUG: KASAN: null-ptr-deref in logi_dj_probe+0xb1/0x754 [hid_logitech_dj] Read of size 4 at addr 0000000000000028 by task kworker/4:1/129 ... Call Trace: logi_dj_probe+0xb1/0x754 [hid_logitech_dj] hid_device_probe+0x329/0x3f0 [hid] really_probe+0x162/0x570 __device_attach+0x137/0x2c0 bus_probe_device+0x38/0xc0 device_add+0xa56/0xce0 hid_add_device+0x19c/0x280 [hid] uhid_device_add_worker+0x2c/0xb0 [uhid] Reject the zero-field report before printing the field report_count.

Gravité et risque d'exploitation

CVE-2026-64427 obtient un score CVSS de 0.0/10, soit une gravité non évaluée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.12 %, ce qui la place devant 1.8 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions ce2a731c179df8869e1969a1b2b5b9e4e1c25f8b, eeb5ad388595ca2b6624689198a057847f3a3e19, <1215febd644c3e16f77e0f1799d89544dd57a754, <7a89ad762fad53d56b7002d7ffc923a4b7f4006f, <590cc4d782487632a52f37c2171bee1eeea29627, 0, <6f7f22a8d244c2e586b8eb61c7585784b62aea01, <=7.1.*, 7.1.4, <f3790a6af9c7f47d454225cab9dc145270e48f62, <7.1, bc3bba4656ad280267ea78cf845ab6b1d95b9fcd, <80c1e18473f63fd7c6a2bc9ad6f3d0a6cc4fb500, <95b3f23d632490b5eb285b9fcf7284f2ac8f9872, 7.1, 7754ade02d0fb1caf20392baf4e02937378fd136, <=*, <2b70bebc709489d29a31ac2935aeffb8d5228395, 968e84f5c0dca4960580d174500e4bbf0c45dc15, b6a57912854e7ea36f3b270032661140cc4209cd, 2ed9638cfbf9d49bdef9b0f5ee547236c2c2f500, 7.2) est présent sur votre parc.
  • Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
  • À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
  • Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.

Références

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