{"id":"CVE-2026-64429","state":"PUBLISHED","title":"gpio: eic-sprd: use raw_spinlock_t in the irq startup path","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: eic-sprd: use raw_spinlock_t in the irq startup path\n\nsprd_eic_irq_unmask() enables the GPIO IRQ and then updates controller\nstate through sprd_eic_update(), which takes sprd_eic->lock with\nspin_lock_irqsave().  The callback can be reached from irq_startup()\nwhile setting up a requested IRQ.  That path is not sleepable, but on\nPREEMPT_RT a regular spinlock_t becomes a sleeping lock.\n\nThis issue was found by our static analysis tool and then manually\nreviewed against the current tree.\n\nThe grounded PoC kept the request_threaded_irq() -> __setup_irq() ->\nirq_startup() -> sprd_eic_irq_unmask() -> sprd_eic_update() carrier and\nused the original spin_lock_irqsave(&sprd_eic->lock) edge.  Lockdep\n\n  BUG: sleeping function called from invalid context\n  hardirqs last disabled at ... __setup_irq.constprop.0 ... [vuln_msv]\n  sprd_rt_spin_lock_irqsave+0x1c/0x30 [vuln_msv]\n  sprd_eic_update.constprop.0+0x48/0x90 [vuln_msv]\n  sprd_eic_irq_unmask.constprop.0+0x35/0x50 [vuln_msv]\n  __setup_irq.constprop.0+0xd/0x30 [vuln_msv]\n\nConvert the Spreadtrum EIC controller lock to raw_spinlock_t.  The\nlocked section only serializes MMIO register updates and does not contain\nsleepable operations, so keeping it non-sleeping is appropriate for the\nirqchip callbacks.","publishedAt":"2026-07-25T08:51:06.016Z","updatedAt":"2026-08-17T04:55:29.849Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"25518e024e3a6e5715d672f1daa91e1d100f7436","status":"affected","lessThan":"96612bf2712cd961dbd9b52f3a9b4ab668f57628","versionType":"git"},{"version":"25518e024e3a6e5715d672f1daa91e1d100f7436","status":"affected","lessThan":"581ac2ad001ff1128931191f249a7f2074672b7a","versionType":"git"},{"version":"25518e024e3a6e5715d672f1daa91e1d100f7436","status":"affected","lessThan":"e244cd8b51001ba480f274c44dba9002813a4739","versionType":"git"},{"version":"25518e024e3a6e5715d672f1daa91e1d100f7436","status":"affected","lessThan":"19d63fd528719ce7d06d9aeb88d25b7d6478198a","versionType":"git"},{"version":"25518e024e3a6e5715d672f1daa91e1d100f7436","status":"affected","lessThan":"6112fba4150039ccd90e29f2d1b788c73ad7b3dd","versionType":"git"},{"version":"25518e024e3a6e5715d672f1daa91e1d100f7436","status":"affected","lessThan":"4750909a40da9016185e0ac991510a278cecb1e7","versionType":"git"},{"version":"25518e024e3a6e5715d672f1daa91e1d100f7436","status":"affected","lessThan":"5c3c9ec1172a4c3384b8b800b3a8896cc2c1b20e","versionType":"git"},{"version":"25518e024e3a6e5715d672f1daa91e1d100f7436","status":"affected","lessThan":"90f0109019e6817eb40a486671b7722d1544ae29","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpio/gpio-eic-sprd.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.17","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.96","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.39","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpio/gpio-eic-sprd.c"]}],"references":["https://git.kernel.org/stable/c/96612bf2712cd961dbd9b52f3a9b4ab668f57628","https://git.kernel.org/stable/c/581ac2ad001ff1128931191f249a7f2074672b7a","https://git.kernel.org/stable/c/e244cd8b51001ba480f274c44dba9002813a4739","https://git.kernel.org/stable/c/19d63fd528719ce7d06d9aeb88d25b7d6478198a","https://git.kernel.org/stable/c/6112fba4150039ccd90e29f2d1b788c73ad7b3dd","https://git.kernel.org/stable/c/4750909a40da9016185e0ac991510a278cecb1e7","https://git.kernel.org/stable/c/5c3c9ec1172a4c3384b8b800b3a8896cc2c1b20e","https://git.kernel.org/stable/c/90f0109019e6817eb40a486671b7722d1544ae29"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/64xxx/CVE-2026-64429.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64429","state":"PUBLISHED","datePublished":"2026-07-25T08:51:06.016Z","dateUpdated":"2026-08-17T04:55:29.849Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T15:36:31.787Z"},"containers":{"cna":{"title":"gpio: eic-sprd: use raw_spinlock_t in the irq startup path","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: eic-sprd: use raw_spinlock_t in the irq startup path\n\nsprd_eic_irq_unmask() enables the GPIO IRQ and then updates controller\nstate through sprd_eic_update(), which takes sprd_eic->lock with\nspin_lock_irqsave().  The callback can be reached from irq_startup()\nwhile setting up a requested IRQ.  That path is not sleepable, but on\nPREEMPT_RT a regular spinlock_t becomes a sleeping lock.\n\nThis issue was found by our static analysis tool and then manually\nreviewed against the current tree.\n\nThe grounded PoC kept the request_threaded_irq() -> __setup_irq() ->\nirq_startup() -> sprd_eic_irq_unmask() -> sprd_eic_update() carrier and\nused the original spin_lock_irqsave(&sprd_eic->lock) edge.  Lockdep\n\n  BUG: sleeping function called from invalid context\n  hardirqs last disabled at ... __setup_irq.constprop.0 ... [vuln_msv]\n  sprd_rt_spin_lock_irqsave+0x1c/0x30 [vuln_msv]\n  sprd_eic_update.constprop.0+0x48/0x90 [vuln_msv]\n  sprd_eic_irq_unmask.constprop.0+0x35/0x50 [vuln_msv]\n  __setup_irq.constprop.0+0xd/0x30 [vuln_msv]\n\nConvert the Spreadtrum EIC controller lock to raw_spinlock_t.  The\nlocked section only serializes MMIO register updates and does not contain\nsleepable operations, so keeping it non-sleeping is appropriate for the\nirqchip callbacks."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"25518e024e3a6e5715d672f1daa91e1d100f7436","status":"affected","lessThan":"96612bf2712cd961dbd9b52f3a9b4ab668f57628","versionType":"git"},{"version":"25518e024e3a6e5715d672f1daa91e1d100f7436","status":"affected","lessThan":"581ac2ad001ff1128931191f249a7f2074672b7a","versionType":"git"},{"version":"25518e024e3a6e5715d672f1daa91e1d100f7436","status":"affected","lessThan":"e244cd8b51001ba480f274c44dba9002813a4739","versionType":"git"},{"version":"25518e024e3a6e5715d672f1daa91e1d100f7436","status":"affected","lessThan":"19d63fd528719ce7d06d9aeb88d25b7d6478198a","versionType":"git"},{"version":"25518e024e3a6e5715d672f1daa91e1d100f7436","status":"affected","lessThan":"6112fba4150039ccd90e29f2d1b788c73ad7b3dd","versionType":"git"},{"version":"25518e024e3a6e5715d672f1daa91e1d100f7436","status":"affected","lessThan":"4750909a40da9016185e0ac991510a278cecb1e7","versionType":"git"},{"version":"25518e024e3a6e5715d672f1daa91e1d100f7436","status":"affected","lessThan":"5c3c9ec1172a4c3384b8b800b3a8896cc2c1b20e","versionType":"git"},{"version":"25518e024e3a6e5715d672f1daa91e1d100f7436","status":"affected","lessThan":"90f0109019e6817eb40a486671b7722d1544ae29","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpio/gpio-eic-sprd.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.17","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.96","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.39","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpio/gpio-eic-sprd.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/96612bf2712cd961dbd9b52f3a9b4ab668f57628"},{"url":"https://git.kernel.org/stable/c/581ac2ad001ff1128931191f249a7f2074672b7a"},{"url":"https://git.kernel.org/stable/c/e244cd8b51001ba480f274c44dba9002813a4739"},{"url":"https://git.kernel.org/stable/c/19d63fd528719ce7d06d9aeb88d25b7d6478198a"},{"url":"https://git.kernel.org/stable/c/6112fba4150039ccd90e29f2d1b788c73ad7b3dd"},{"url":"https://git.kernel.org/stable/c/4750909a40da9016185e0ac991510a278cecb1e7"},{"url":"https://git.kernel.org/stable/c/5c3c9ec1172a4c3384b8b800b3a8896cc2c1b20e"},{"url":"https://git.kernel.org/stable/c/90f0109019e6817eb40a486671b7722d1544ae29"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T04:55:29.849Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"5.10.261"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"5.15.212"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.12.96"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.18.39"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"7.1.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}