CVE-2026-99007drm/fb-helper: defer setup when fbdev_probe() fails, not just on -EAGAIN
- —Not scoredno CVSS score yet
- 0.18%Exploitation in 30 daysEPSS · top 93% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: drm/fb-helper: defer setup when fbdev_probe() fails, not just on -EAGAIN __drm_fb_helper_initial_config_and_unlock() calls drm_client_modeset_probe() first, which already fills in each mode_set->mode/num_connectors for every connected output, and only afterwards calls drm_fb_helper_single_fb_probe() to create fb_helper->fb and wire it into those mode_sets via drm_setup_crtcs_fb(). If drm_fb_helper_single_fb_probe() fails with anything other than -EAGAIN (e.g. dev->driver->fbdev_probe() itself fails), the function bails out before drm_setup_crtcs_fb() runs and before setting fb_helper->deferred_setup. The client is left with mode_sets that have a mode and connectors but mode_set->fb == NULL, and nothing marks this fb_helper as needing a retry. __drm_fb_helper_restore_fbdev_mode_unlocked() only skips committing when fb_helper->deferred_setup is set, so a later .restore() call (drm_lastclose() on process exit, in this report) commits the stale mode_set through drm_client_modeset_commit() -> drm_client_modeset_commit_atomic() -> __drm_atomic_helper_set_config(), which hits WARN_ON(!set->fb). Mark fb_helper->deferred_setup on any drm_fb_helper_single_fb_probe() failure, not just -EAGAIN, so restore keeps skipping the commit until a later hotplug event successfully re-probes and re-populates mode_set->fb. The real error code is still returned to the caller unchanged.
Timeline
ID reserved
By Linux
- 28 days later
· 28 days later
Published
- 7 days later
· 7 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.18% · top 93% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected ca91a2758fcef6635626993557dd51cfbb6dd134 – < 423c871a586cff8b29f48db00e3c45c21d0e8121
- affected ca91a2758fcef6635626993557dd51cfbb6dd134 – < e5f8f6e0f0a18c77c04b757d72319d897a0b4bc1
- affected ca91a2758fcef6635626993557dd51cfbb6dd134 – < 9124411cb91b129ff3ffb0d723ecba7a5bf893f9
- affected ca91a2758fcef6635626993557dd51cfbb6dd134 – < 4a2006c675758f0c765b36fec6b49d17e89159cf
- affected ca91a2758fcef6635626993557dd51cfbb6dd134 – < 3b303696f61461b3569019d7fcac6a646652b2b4
- affected ca91a2758fcef6635626993557dd51cfbb6dd134 – < 4e7b508c7c60dec7a86b7eb2a1b7e6d174afa457
- affected ca91a2758fcef6635626993557dd51cfbb6dd134 – < d510ed273854177f0a3ed330145858b2fe667f81
- affected ca91a2758fcef6635626993557dd51cfbb6dd134 – < 755c94d178b7e972bb766199d34e4ba4f63a89eb
- affected 4.14
- unaffected < 4.14
- unaffected 5.10.273 – ≤ 5.10.*
- unaffected 5.15.224 – ≤ 5.15.*
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.113 – ≤ 6.12.*
- unaffected 6.18.57 – ≤ 6.18.*
- unaffected 7.2.11 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/423c871a586cff8b29f48db00e3c45c21d0e8121 (opens in a new tab)
- https://git.kernel.org/stable/c/e5f8f6e0f0a18c77c04b757d72319d897a0b4bc1 (opens in a new tab)
- https://git.kernel.org/stable/c/9124411cb91b129ff3ffb0d723ecba7a5bf893f9 (opens in a new tab)
- https://git.kernel.org/stable/c/4a2006c675758f0c765b36fec6b49d17e89159cf (opens in a new tab)
- https://git.kernel.org/stable/c/3b303696f61461b3569019d7fcac6a646652b2b4 (opens in a new tab)
- https://git.kernel.org/stable/c/4e7b508c7c60dec7a86b7eb2a1b7e6d174afa457 (opens in a new tab)
- https://git.kernel.org/stable/c/d510ed273854177f0a3ed330145858b2fe667f81 (opens in a new tab)
- https://git.kernel.org/stable/c/755c94d178b7e972bb766199d34e4ba4f63a89eb (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-108801 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://cveledger.app/cve/CVE-2026-99007)Record last updated .