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CVE-2026-31585

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.2%
Linux•Linux•Versions : <=6.1.*, <=7.0.*, <=6.12.*, <f8cccb427e65d725fc0ba05e8900b4676eda268e, 0, 6.12.83, 7.0.1, <98c22210aeadce67d9d20059f0dbbd01ba7fdbba, 5.15.209, <60f768d46df561e06d92ffcacc00909f37a0f23d, <80900b5424f3454256153ce386388df43b324f63, <83110c2c8c46c035c2e0fc8ff3e4991183bf9ccd, <=5.10.*, <=6.6.*, 6.1.175, <=6.19.*, <4bf95f797edd63c93330eafb6d6e670982344b9b, 6.6.136, <5.10, 7.1, <=6.18.*, f90cf6079bf67988f8b1ad1ade70fc89d0080905, 5.10.258, <a0e5a598fe9a4612b852406b51153b881592aede, <=*, 6.19.14, <=5.15.*, <17cb7957c979529cc98ff57f7ac331532f1f7c83, <25f19e476ab15defe698504212899fdb9f7cd61b, 5.10, 6.18.24

Description

In the Linux kernel, the following vulnerability has been resolved: media: vidtv: fix nfeeds state corruption on start_streaming failure syzbot reported a memory leak in vidtv_psi_service_desc_init [1]. When vidtv_start_streaming() fails inside vidtv_start_feed(), the nfeeds counter is left incremented even though no feed was actually started. This corrupts the driver state: subsequent start_feed calls see nfeeds > 1 and skip starting the mux, while stop_feed calls eventually try to stop a non-existent stream. This state corruption can also lead to memory leaks, since the mux and channel resources may be partially allocated during a failed start_streaming but never cleaned up, as the stop path finds dvb->streaming == false and returns early. Fix by decrementing nfeeds back when start_streaming fails, keeping the counter in sync with the actual number of active feeds. [1] BUG: memory leak unreferenced object 0xffff888145b50820 (size 32): comm "syz.0.17", pid 6068, jiffies 4294944486 backtrace (crc 90a0c7d4): vidtv_psi_service_desc_init+0x74/0x1b0 drivers/media/test-drivers/vidtv/vidtv_psi.c:288 vidtv_channel_s302m_init+0xb1/0x2a0 drivers/media/test-drivers/vidtv/vidtv_channel.c:83 vidtv_channels_init+0x1b/0x40 drivers/media/test-drivers/vidtv/vidtv_channel.c:524 vidtv_mux_init+0x516/0xbe0 drivers/media/test-drivers/vidtv/vidtv_mux.c:518 vidtv_start_streaming drivers/media/test-drivers/vidtv/vidtv_bridge.c:194 [inline] vidtv_start_feed+0x33e/0x4d0 drivers/media/test-drivers/vidtv/vidtv_bridge.c:239

Gravité et risque d'exploitation

CVE-2026-31585 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 0.17 %, ce qui la place devant 5.5 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <=6.1.*, <=7.0.*, <=6.12.*, <f8cccb427e65d725fc0ba05e8900b4676eda268e, 0, 6.12.83, 7.0.1, <98c22210aeadce67d9d20059f0dbbd01ba7fdbba, 5.15.209, <60f768d46df561e06d92ffcacc00909f37a0f23d, <80900b5424f3454256153ce386388df43b324f63, <83110c2c8c46c035c2e0fc8ff3e4991183bf9ccd, <=5.10.*, <=6.6.*, 6.1.175, <=6.19.*, <4bf95f797edd63c93330eafb6d6e670982344b9b, 6.6.136, <5.10, 7.1, <=6.18.*, f90cf6079bf67988f8b1ad1ade70fc89d0080905, 5.10.258, <a0e5a598fe9a4612b852406b51153b881592aede, <=*, 6.19.14, <=5.15.*, <17cb7957c979529cc98ff57f7ac331532f1f7c83, <25f19e476ab15defe698504212899fdb9f7cd61b, 5.10, 6.18.24) 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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