CVE-2026-64429gpio: eic-sprd: use raw_spinlock_t in the irq startup path
- 5.5MediumCVSS base score
- 0.10%Exploitation in 30 daysEPSS · top 99% 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: gpio: eic-sprd: use raw_spinlock_t in the irq startup path sprd_eic_irq_unmask() enables the GPIO IRQ and then updates controller state through sprd_eic_update(), which takes sprd_eic->lock with spin_lock_irqsave(). The callback can be reached from irq_startup() while setting up a requested IRQ. That path is not sleepable, but on PREEMPT_RT a regular spinlock_t becomes a sleeping lock. This issue was found by our static analysis tool and then manually reviewed against the current tree. The grounded PoC kept the request_threaded_irq() -> __setup_irq() -> irq_startup() -> sprd_eic_irq_unmask() -> sprd_eic_update() carrier and used the original spin_lock_irqsave(&sprd_eic->lock) edge. Lockdep BUG: sleeping function called from invalid context hardirqs last disabled at ... __setup_irq.constprop.0 ... [vuln_msv] sprd_rt_spin_lock_irqsave+0x1c/0x30 [vuln_msv] sprd_eic_update.constprop.0+0x48/0x90 [vuln_msv] sprd_eic_irq_unmask.constprop.0+0x35/0x50 [vuln_msv] __setup_irq.constprop.0+0xd/0x30 [vuln_msv] Convert the Spreadtrum EIC controller lock to raw_spinlock_t. The locked section only serializes MMIO register updates and does not contain sleepable operations, so keeping it non-sleeping is appropriate for the irqchip callbacks.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 23 days later
· 23 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
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.10% · top 99% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 25518e024e3a6e5715d672f1daa91e1d100f7436 – < 96612bf2712cd961dbd9b52f3a9b4ab668f57628
- affected 25518e024e3a6e5715d672f1daa91e1d100f7436 – < 581ac2ad001ff1128931191f249a7f2074672b7a
- affected 25518e024e3a6e5715d672f1daa91e1d100f7436 – < e244cd8b51001ba480f274c44dba9002813a4739
- affected 25518e024e3a6e5715d672f1daa91e1d100f7436 – < 19d63fd528719ce7d06d9aeb88d25b7d6478198a
- affected 25518e024e3a6e5715d672f1daa91e1d100f7436 – < 6112fba4150039ccd90e29f2d1b788c73ad7b3dd
- affected 25518e024e3a6e5715d672f1daa91e1d100f7436 – < 4750909a40da9016185e0ac991510a278cecb1e7
- affected 25518e024e3a6e5715d672f1daa91e1d100f7436 – < 5c3c9ec1172a4c3384b8b800b3a8896cc2c1b20e
- affected 25518e024e3a6e5715d672f1daa91e1d100f7436 – < 90f0109019e6817eb40a486671b7722d1544ae29
- affected 4.17
- unaffected < 4.17
- unaffected 5.10.261 – ≤ 5.10.*
- unaffected 5.15.212 – ≤ 5.15.*
- unaffected 6.1.178 – ≤ 6.1.*
- unaffected 6.6.145 – ≤ 6.6.*
- unaffected 6.12.96 – ≤ 6.12.*
- unaffected 6.18.39 – ≤ 6.18.*
- unaffected 7.1.4 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References8
- https://git.kernel.org/stable/c/96612bf2712cd961dbd9b52f3a9b4ab668f57628 (opens in a new tab)
- https://git.kernel.org/stable/c/581ac2ad001ff1128931191f249a7f2074672b7a (opens in a new tab)
- https://git.kernel.org/stable/c/e244cd8b51001ba480f274c44dba9002813a4739 (opens in a new tab)
- https://git.kernel.org/stable/c/19d63fd528719ce7d06d9aeb88d25b7d6478198a (opens in a new tab)
- https://git.kernel.org/stable/c/6112fba4150039ccd90e29f2d1b788c73ad7b3dd (opens in a new tab)
- https://git.kernel.org/stable/c/4750909a40da9016185e0ac991510a278cecb1e7 (opens in a new tab)
- https://git.kernel.org/stable/c/5c3c9ec1172a4c3384b8b800b3a8896cc2c1b20e (opens in a new tab)
- https://git.kernel.org/stable/c/90f0109019e6817eb40a486671b7722d1544ae29 (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-2026-48773 (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)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-64429)Record last updated .