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CVE-2026-98605

Linux: drm/bridge: samsung-dsim: fix TE GPIO lifetime for host attach

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
NoneNot scored
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.17%Chance of exploitation activity in the next 30 days, higher than 5% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in77a43e00c57486a5212ef22d4665cafad62a5d4bAlso 5759bbef951c39d264ac0f47daa4137d01403aea, 9b796251c3cca45a33a5c859c6818c58aa982277CVE List
Published18 Oct 2026Updated 19 Oct 2026CVE List

What fixes it

  • 77a43e00c57486a5212ef22d4665cafad62a5d4bLinuxCVE List
  • 5759bbef951c39d264ac0f47daa4137d01403aeaLinuxCVE List
  • 9b796251c3cca45a33a5c859c6818c58aa982277LinuxCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

In the Linux kernel, the following vulnerability has been resolved:

drm/bridge: samsung-dsim: fix TE GPIO lifetime for host attach

When the Exynos DSI driver was generalized into samsung-dsim, the TE GPIO acquisition was switched from gpiod_get_optional() to devm_gpiod_get_optional() while keeping the matching gpiod_put() calls. That combination is wrong for a managed descriptor.

However, dropping the puts and keeping the managed get is also wrong: samsung_dsim_register_te_irq() runs from the DSI host attach callback, and host detach/reattach can happen without destroying the device that owns the managed action. A second attach would then request the GPIO again without having released it.

Switch back to a non-managed gpiod_get_optional() and keep the explicit gpiod_put() on the request_irq() error path and in samsung_dsim_unregister_te_irq().

[Luca: remove unnecessary comment]

Text from CVE List

Affected versions 12

  • Linuxaffected: e7447128ca4a250374d6721ee98e3e3cf99551a6 before 77a43e00c57486a5212ef22d4665cafad62a5d4bCVE List
  • Linuxaffected: e7447128ca4a250374d6721ee98e3e3cf99551a6 before 5759bbef951c39d264ac0f47daa4137d01403aeaCVE List
  • Linuxaffected: e7447128ca4a250374d6721ee98e3e3cf99551a6 before ebffd70e4877bb7554974cf975a27872f2bb225fCVE List
  • Linuxaffected: e7447128ca4a250374d6721ee98e3e3cf99551a6 before 9b796251c3cca45a33a5c859c6818c58aa982277CVE List
  • Linuxaffected: e7447128ca4a250374d6721ee98e3e3cf99551a6 before ada667890773e033d2f40dc94176e3beb930b516CVE List
  • Linuxaffected: 6.4CVE List
  • Linuxunaffected: all versions before 6.4CVE List
  • Linuxunaffected: 6.6.158 through 6.6.*CVE List
  • Linuxunaffected: 6.12.112 through 6.12.*CVE List
  • Linuxunaffected: 6.18.55 through 6.18.*CVE List
  • Linuxunaffected: 7.2.9 through 7.2.*CVE List
  • Linuxunaffected: 7.3CVE List

References 5