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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 4a2f3d8260a996bc43dcc1ce49ac594db54f4b3e, < e68da90ac00d8b681561aeb8f5d6c47af3a04861; >= 46e22de65eb45a67a68ddfe9301f79b0c3821ca8, < 6266b3509b2c6ebf2f9daf2239ff8eb60c5f5bd3; >= a53b3599d9bf9375f9033f2aa1fa92714fb1d0f0, < 446289b8b36b2ee98dabf6388acbddcc33ed41be; >= 4117975672c4743cffaf32b6fd018cfacd1b420e, < 3821cae9bd5a99a42d3d0be1b58e41f072cd4c4c; >= 9ca4fe357464bbdad0db67985275f2694df8dab5, < 090c8714efe1c3c470301cc2f794c1ee2a57746c; >= e060dbb7393ed7bdfba6b5ea7566f9ef87381cfb, < 333579202f09e260e8116321df4c55f80a19b160; >= a5951389e58d2e816eed3dbec5877de9327fd881, < fee4d171451c1ad9e8aaf65fc0ab7d143a33bd72; ed681e90fb244aa883b918c4d8be2614e816c6df; >= 6.13.12, < 6.14 |
| Linux | Linux | >= 5.15.181, < 5.15.182; >= 6.1.135, < 6.1.138; >= 6.6.88, < 6.6.90; >= 6.12.24, < 6.12.28; >= 6.14.3, < 6.14.6 |
References
- https://git.kernel.org/stable/c/090c8714efe1c3c470301cc2f794c1ee2a57746cPatch
- https://git.kernel.org/stable/c/333579202f09e260e8116321df4c55f80a19b160Patch
- https://git.kernel.org/stable/c/3821cae9bd5a99a42d3d0be1b58e41f072cd4c4cPatch
- https://git.kernel.org/stable/c/446289b8b36b2ee98dabf6388acbddcc33ed41bePatch
- https://git.kernel.org/stable/c/6266b3509b2c6ebf2f9daf2239ff8eb60c5f5bd3Patch
- https://git.kernel.org/stable/c/e68da90ac00d8b681561aeb8f5d6c47af3a04861Patch
- https://git.kernel.org/stable/c/fee4d171451c1ad9e8aaf65fc0ab7d143a33bd72Patch
- https://lists.debian.org/debian-lts-announce/2025/08/msg00010.htmlMailing List, Third Party Advisory
Timeline
- Published
- May 20, 2025
- Last modified
- Jun 17, 2026
- NVD status
- Analyzed