CVE-2025-37929 (GCVE-0-2025-37929)

Vulnerability from cvelistv5 – Published: 2025-05-20 15:21 – Updated: 2025-11-03 19:57
VLAI?
Title
arm64: errata: Add missing sentinels to Spectre-BHB MIDR arrays
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 4a2f3d8260a996bc43dcc1ce49ac594db54f4b3e , < e68da90ac00d8b681561aeb8f5d6c47af3a04861 (git)
Affected: 46e22de65eb45a67a68ddfe9301f79b0c3821ca8 , < 6266b3509b2c6ebf2f9daf2239ff8eb60c5f5bd3 (git)
Affected: a53b3599d9bf9375f9033f2aa1fa92714fb1d0f0 , < 446289b8b36b2ee98dabf6388acbddcc33ed41be (git)
Affected: 4117975672c4743cffaf32b6fd018cfacd1b420e , < 3821cae9bd5a99a42d3d0be1b58e41f072cd4c4c (git)
Affected: 9ca4fe357464bbdad0db67985275f2694df8dab5 , < 090c8714efe1c3c470301cc2f794c1ee2a57746c (git)
Affected: e060dbb7393ed7bdfba6b5ea7566f9ef87381cfb , < 333579202f09e260e8116321df4c55f80a19b160 (git)
Affected: a5951389e58d2e816eed3dbec5877de9327fd881 , < fee4d171451c1ad9e8aaf65fc0ab7d143a33bd72 (git)
Affected: ed681e90fb244aa883b918c4d8be2614e816c6df (git)
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    Linux Linux Affected: 5.15.181 , < 5.15.182 (semver)
Affected: 6.1.135 , < 6.1.138 (semver)
Affected: 6.6.88 , < 6.6.90 (semver)
Affected: 6.12.24 , < 6.12.28 (semver)
Affected: 6.14.3 , < 6.14.6 (semver)
Create a notification for this product.
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\narm64: errata: Add missing sentinels to Spectre-BHB MIDR arrays\n\nCommit a5951389e58d (\"arm64: errata: Add newer ARM cores to the\nspectre_bhb_loop_affected() lists\") added some additional CPUs to the\nSpectre-BHB workaround, including some new arrays for designs that\nrequire new \u0027k\u0027 values for the workaround to be effective.\n\nUnfortunately, the new arrays omitted the sentinel entry and so\nis_midr_in_range_list() will walk off the end when it doesn\u0027t find a\nmatch. With UBSAN enabled, this leads to a crash during boot when\nis_midr_in_range_list() is inlined (which was more common prior to\nc8c2647e69be (\"arm64: Make \u00a0_midr_in_range_list() an exported\nfunction\")):\n\n |  Internal error: aarch64 BRK: 00000000f2000001 [#1] PREEMPT SMP\n |  pstate: 804000c5 (Nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n |  pc : spectre_bhb_loop_affected+0x28/0x30\n |  lr : is_spectre_bhb_affected+0x170/0x190\n | [...]\n |  Call trace:\n |   spectre_bhb_loop_affected+0x28/0x30\n |   update_cpu_capabilities+0xc0/0x184\n |   init_cpu_features+0x188/0x1a4\n |   cpuinfo_store_boot_cpu+0x4c/0x60\n |   smp_prepare_boot_cpu+0x38/0x54\n |   start_kernel+0x8c/0x478\n |   __primary_switched+0xc8/0xd4\n |  Code: 6b09011f 54000061 52801080 d65f03c0 (d4200020)\n |  ---[ end trace 0000000000000000 ]---\n |  Kernel panic - not syncing: aarch64 BRK: Fatal exception\n\nAdd the missing sentinel entries."
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