CVE & CISA-KEV Catalog

CVE-2025-37929

MEDIUM
5.5
CVSS v3
NVD

Description

In the Linux kernel, the following vulnerability has been resolved: arm64: errata: Add missing sentinels to Spectre-BHB MIDR arrays Commit a5951389e58d ("arm64: errata: Add newer ARM cores to the spectre_bhb_loop_affected() lists") added some additional CPUs to the Spectre-BHB workaround, including some new arrays for designs that require new 'k' values for the workaround to be effective. Unfortunately, the new arrays omitted the sentinel entry and so is_midr_in_range_list() will walk off the end when it doesn't find a match. With UBSAN enabled, this leads to a crash during boot when is_midr_in_range_list() is inlined (which was more common prior to c8c2647e69be ("arm64: Make _midr_in_range_list() an exported function")): | Internal error: aarch64 BRK: 00000000f2000001 [#1] PREEMPT SMP | pstate: 804000c5 (Nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) | pc : spectre_bhb_loop_affected+0x28/0x30 | lr : is_spectre_bhb_affected+0x170/0x190 | [...] | Call trace: | spectre_bhb_loop_affected+0x28/0x30 | update_cpu_capabilities+0xc0/0x184 | init_cpu_features+0x188/0x1a4 | cpuinfo_store_boot_cpu+0x4c/0x60 | smp_prepare_boot_cpu+0x38/0x54 | start_kernel+0x8c/0x478 | __primary_switched+0xc8/0xd4 | Code: 6b09011f 54000061 52801080 d65f03c0 (d4200020) | ---[ end trace 0000000000000000 ]--- | Kernel panic - not syncing: aarch64 BRK: Fatal exception Add the missing sentinel entries.

CWE-476NULL Pointer Dereference

How to fix

Remediation Available
linuxDebian
Fixed in:6.1.140-1CVE-2025-37929
Fixed in:6.12.29-1CVE-2025-37929
Fixed in:6.12.29-1CVE-2025-37929
linux-aws-6.14Ubuntu
Fixed in:6.14.0-1009.9~24.04.1USN-7665-2
linux-image-6.14.0-1007-oemUbuntu
Fixed in:6.14.0-1007.7USN-7650-1
linux-image-6.14.0-1009-awsUbuntu
Fixed in:6.14.0-1009.9~24.04.1USN-7665-2
linux-image-6.14.0-1009-aws-64kUbuntu
Fixed in:6.14.0-1009.9~24.04.1USN-7665-2
linux-image-awsUbuntu
Fixed in:6.14.0-1009.9~24.04.1USN-7665-2
linux-image-aws-6.14Ubuntu
Fixed in:6.14.0-1009.9~24.04.1USN-7665-2
linux-image-aws-64kUbuntu
Fixed in:6.14.0-1009.9~24.04.1USN-7665-2
linux-image-aws-64k-6.14Ubuntu
Fixed in:6.14.0-1009.9~24.04.1USN-7665-2
linux-image-oem-24.04cUbuntu
Fixed in:6.14.0-1007.7USN-7650-1
linux-image-oem-6.14Ubuntu
Fixed in:6.14.0-1007.7USN-7650-1
linux-oem-6.14Ubuntu
Fixed in:6.14.0-1007.7USN-7650-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityNone
IntegrityNone
AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

0.16%probability of exploitation in 30 days
6thpercentile

Low risk: more likely to be exploited than 6% of all known CVEs.

References

Third-Party Advisory1

Related Vulnerabilities

Other CWE-476 (NULL Pointer Dereference) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2023-21758High7.592%-Fix
CVE-2023-21547High7.588%-Fix
CVE-2014-3470Medium4.386%-Fix
CVE-2021-44224High8.282%-Fix
CVE-2016-0742High7.582%-Fix
CVE-2009-1386Medium5.080%-Fix
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-10.