CVE-2026-74547
N/A ALL-YEARSIn the Linux kernel, the following vulnerability has been resolved: hwmon: (adt7470) Fix busy-loop and I2C flooding in update thread When userspace configures 'auto_update_interval' to 0 via sysfs, the background kthread executes schedule_timeout_interruptible(0), which returns immediately. If 'num_temp_sensors' is concurrently or previously set to 0, the msleep_interruptible() delay inside adt7470_read_temperatures() also becomes 0. This combination forces the background thread into a tight, unbounded busy-loop, hogging the CPU and flooding the I2C bus with a continuous stream of transactions. Fix this vulnerability by raising the lower limit of the clamp_val in auto_update_interval_store() from 0 to 500 milliseconds. This guarantees a reasonable minimum sleep window between sensor updates, protecting the system from intentional or accidental I2C bus denial of service.
No known exploitation, public exploit, or elevated probability at this time. Track for changes.
Exploitation likelihood
0.2%chance of exploitation in 30 days · 7th percentile
Impact if exploited
—CVSS · not scored
- No impact metrics
Proof of concept
No public PoC is currently catalogued.
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References and research data (JSON)
Vendor product assessments
Showing 32 of 274 vendor product statements; 242 omitted. Read the full vendor advisory.
kernel as a component of Red Hat Enterprise Linux 10 · known affected
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pkg:rpm/redhat/kernel
- none available: Fix deferred
kernel-64k-debug-modules-extra as a component of Red Hat Enterprise Linux 10 · known affected
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pkg:rpm/redhat/kernel-64k-debug-modules-extra
- none available: Fix deferred
kernel-debug-core as a component of Red Hat Enterprise Linux 10 · known affected
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pkg:rpm/redhat/kernel-debug-core
- none available: Fix deferred
kernel-devel-matched as a component of Red Hat Enterprise Linux 10 · known affected
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pkg:rpm/redhat/kernel-devel-matched
- none available: Fix deferred
kernel-rt-64k-debug as a component of Red Hat Enterprise Linux 10 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel-rt-64k-debug
- none available: Fix deferred
kernel-rt-64k-modules-extra as a component of Red Hat Enterprise Linux 10 · known affected
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pkg:rpm/redhat/kernel-rt-64k-modules-extra
- none available: Fix deferred
kernel-rt-devel as a component of Red Hat Enterprise Linux 10 · known affected
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pkg:rpm/redhat/kernel-rt-devel
- none available: Fix deferred
kernel-uki-virt-addons as a component of Red Hat Enterprise Linux 10 · known affected
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pkg:rpm/redhat/kernel-uki-virt-addons
- none available: Fix deferred
kernel.src as a component of Red Hat Enterprise Linux 10 · known affected
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pkg:rpm/redhat/kernel?arch=src
- none available: Fix deferred
kernel-debug as a component of Red Hat Enterprise Linux 6 · known affected
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pkg:rpm/redhat/kernel-debug
- no fix planned: Out of support scope
perf as a component of Red Hat Enterprise Linux 6 · known affected
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pkg:rpm/redhat/perf
- no fix planned: Out of support scope
kernel-doc as a component of Red Hat Enterprise Linux 7 · known affected
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pkg:rpm/redhat/kernel-doc
- none available: Fix deferred
kernel-rt-doc as a component of Red Hat Enterprise Linux 7 · known affected
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pkg:rpm/redhat/kernel-rt-doc
- none available: Fix deferred
kernel-tools-libs-devel as a component of Red Hat Enterprise Linux 7 · known affected
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pkg:rpm/redhat/kernel-tools-libs-devel
- none available: Fix deferred
kernel-cross-headers as a component of Red Hat Enterprise Linux 8 · known affected
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pkg:rpm/redhat/kernel-cross-headers
- none available: Fix deferred
kernel-headers as a component of Red Hat Enterprise Linux 8 · known affected
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pkg:rpm/redhat/kernel-headers
- none available: Fix deferred
kernel-rt-debug-devel as a component of Red Hat Enterprise Linux 8 · known affected
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pkg:rpm/redhat/kernel-rt-debug-devel
- none available: Fix deferred
kernel-rt-modules-internal as a component of Red Hat Enterprise Linux 8 · known affected
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pkg:rpm/redhat/kernel-rt-modules-internal
- none available: Fix deferred
kernel-zfcpdump-devel as a component of Red Hat Enterprise Linux 8 · known affected
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pkg:rpm/redhat/kernel-zfcpdump-devel
- none available: Fix deferred
kernel as a component of Red Hat Enterprise Linux 9 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel
- none available: Fix deferred
kernel-64k-debug-modules-extra as a component of Red Hat Enterprise Linux 9 · known affected
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pkg:rpm/redhat/kernel-64k-debug-modules-extra
- none available: Fix deferred
kernel-64k-modules-partner as a component of Red Hat Enterprise Linux 9 · known affected
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pkg:rpm/redhat/kernel-64k-modules-partner
- none available: Fix deferred
kernel-debug-modules-core as a component of Red Hat Enterprise Linux 9 · known affected
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pkg:rpm/redhat/kernel-debug-modules-core
- none available: Fix deferred
kernel-headers as a component of Red Hat Enterprise Linux 9 · known affected
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pkg:rpm/redhat/kernel-headers
- none available: Fix deferred
kernel-rt-64k as a component of Red Hat Enterprise Linux 9 · known affected
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pkg:rpm/redhat/kernel-rt-64k
- none available: Fix deferred
kernel-rt-64k-debug-modules-extra as a component of Red Hat Enterprise Linux 9 · known affected
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pkg:rpm/redhat/kernel-rt-64k-debug-modules-extra
- none available: Fix deferred
kernel-rt-64k-modules-internal as a component of Red Hat Enterprise Linux 9 · known affected
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pkg:rpm/redhat/kernel-rt-64k-modules-internal
- none available: Fix deferred
kernel-rt-debug-modules-core as a component of Red Hat Enterprise Linux 9 · known affected
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pkg:rpm/redhat/kernel-rt-debug-modules-core
- none available: Fix deferred
kernel-rt-modules-extra as a component of Red Hat Enterprise Linux 9 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel-rt-modules-extra
- none available: Fix deferred
kernel-tools-libs-devel as a component of Red Hat Enterprise Linux 9 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel-tools-libs-devel
- none available: Fix deferred
kernel-zfcpdump-modules-extra as a component of Red Hat Enterprise Linux 9 · known affected
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pkg:rpm/redhat/kernel-zfcpdump-modules-extra
- none available: Fix deferred
rv as a component of Red Hat Enterprise Linux 9 · known affected
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pkg:rpm/redhat/rv
- none available: Fix deferred
References
Advisories
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74547.json Red Hat · CVE-2026-74547 · Updated 2026-08-19T19:43:07+00:00
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-59740 EUVD · EUVD-2026-59740
Technical & other
- https://git.kernel.org/stable/c/2c4c4d7cadd10b50b5489183bbbb9eb95f6f8344CVE record · Linux · Updated 2026-08-19T16:38:37.219Z
NVD · CVE-2026-74547 · Updated 2026-08-19T17:21:09.567 - https://git.kernel.org/stable/c/4dc1518f9cc57c6db99514cafeb02dd7117d5bdaCVE record · Linux · Updated 2026-08-19T16:38:37.219Z
NVD · CVE-2026-74547 · Updated 2026-08-19T17:21:09.567 - https://git.kernel.org/stable/c/1325975a2eab265510e6036d8bf0c0068373d332CVE record · Linux · Updated 2026-08-19T16:38:37.219Z
NVD · CVE-2026-74547 · Updated 2026-08-19T17:21:09.567 - https://git.kernel.org/stable/c/1a42bd72a66205e439db1d1142442b62d393408aCVE record · Linux · Updated 2026-08-19T16:38:37.219Z
NVD · CVE-2026-74547 · Updated 2026-08-19T17:21:09.567 - https://git.kernel.org/stable/c/38e6b5ce5794ff09442231cc171c2be5e900bab3CVE record · Linux · Updated 2026-08-19T16:38:37.219Z
NVD · CVE-2026-74547 · Updated 2026-08-19T17:21:09.567 - https://git.kernel.org/stable/c/82d65f7ef11edcea0228745440b8b4b1f222c34cCVE record · Linux · Updated 2026-08-19T16:38:37.219Z
NVD · CVE-2026-74547 · Updated 2026-08-19T17:21:09.567 - https://git.kernel.org/stable/c/5ea299c3aa42a827f6a863eeead6de3525bbb17aCVE record · Linux · Updated 2026-08-19T16:38:37.219Z
NVD · CVE-2026-74547 · Updated 2026-08-19T17:21:09.567 - https://git.kernel.org/stable/c/cb0b7f9c43b0abbd422a7e4c2c85e91db429207cCVE record · Linux · Updated 2026-08-19T16:38:37.219Z
NVD · CVE-2026-74547 · Updated 2026-08-19T17:21:09.567 - https://access.redhat.com/security/cve/CVE-2026-74547 Red Hat · CVE-2026-74547 · Updated 2026-08-19T19:43:07+00:00
- https://bugzilla.redhat.com/show_bug.cgi?id=2517038 Red Hat · CVE-2026-74547 · Updated 2026-08-19T19:43:07+00:00
- https://www.cve.org/CVERecord?id=CVE-2026-74547 Red Hat · CVE-2026-74547 · Updated 2026-08-19T19:43:07+00:00
- https://nvd.nist.gov/vuln/detail/CVE-2026-74547 Red Hat · CVE-2026-74547 · Updated 2026-08-19T19:43:07+00:00
- https://lore.kernel.org/linux-cve-announce/2026081549-CVE-2026-74547-6a6e@gregkh/T Red Hat · CVE-2026-74547 · Updated 2026-08-19T19:43:07+00:00
Sources: NVD · CVE.org · All sources and attribution · EPSS