CVE-2026-74733gpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock
- 7.8HighCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 97% 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: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock Locking is disabled in the regmap config as this driver uses its own lock. This means that all calls to regmap functions (read or write) must hold the i2c_lock. The function pca953x_irq_bus_sync_unlock() did not do this, and it was therefore possible that multiple threads could cause an incorrect register to be read/written. A previous patch partly fixed this, but only protected the write to the interrupt mask register, and not the read from the direction register.
Timeline
ID reserved
By Linux
- 7 days later
· 7 days later
Published
- 2 months later
· 2 months 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 |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 97% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 58a5c93bd1a6e949267400080f07e57ffe05ec34 – < 58ed56c093a857c19f04cf3db1f02d2e793aec88
- affected e2ecdddca80dd845df42376e4b0197fe97018ba2 – < 5d05c4252c09ce10624be2197853c80bf87424e4
- affected bfc6444b57dc7186b6acc964705d7516cbaf3904 – < 41255e64eb9dd87b0b8675f4e47a9c67bcef6e39
- affected bfc6444b57dc7186b6acc964705d7516cbaf3904 – < bf3f37c2d40b51deb79aea910f28999d7c8c6b5a
- affected bfc6444b57dc7186b6acc964705d7516cbaf3904 – < e6a2f5f845f50b0c4299bace5111f56d3390a090
- affected bfc6444b57dc7186b6acc964705d7516cbaf3904 – < 9dc325327babe7f159e84cbe9380a45342da0585
- affected de7cffa53149c7b48bd1bb29b02390c9f05b7f41
- affected 6.1.101 – < 6.1.191
- affected 6.6.42 – < 6.6.160
- affected 6.9.11 – < 6.10
- affected 6.10
- unaffected < 6.10
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.114 – ≤ 6.12.*
- unaffected 6.18.57 – ≤ 6.18.*
- unaffected 7.1.9 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References6
- https://git.kernel.org/stable/c/58ed56c093a857c19f04cf3db1f02d2e793aec88 (opens in a new tab)
- https://git.kernel.org/stable/c/5d05c4252c09ce10624be2197853c80bf87424e4 (opens in a new tab)
- https://git.kernel.org/stable/c/41255e64eb9dd87b0b8675f4e47a9c67bcef6e39 (opens in a new tab)
- https://git.kernel.org/stable/c/bf3f37c2d40b51deb79aea910f28999d7c8c6b5a (opens in a new tab)
- https://git.kernel.org/stable/c/e6a2f5f845f50b0c4299bace5111f56d3390a090 (opens in a new tab)
- https://git.kernel.org/stable/c/9dc325327babe7f159e84cbe9380a45342da0585 (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-2026-64420 (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-2026-74733)Record last updated .