CVE-2024-50203: bpf, arm64: Fix address emission with tag-based KASAN enabled

First published: Fri Nov 08 2024(Updated: )

In the Linux kernel, the following vulnerability has been resolved: bpf, arm64: Fix address emission with tag-based KASAN enabled When BPF_TRAMP_F_CALL_ORIG is enabled, the address of a bpf_tramp_image struct on the stack is passed during the size calculation pass and an address on the heap is passed during code generation. This may cause a heap buffer overflow if the heap address is tagged because emit_a64_mov_i64() will emit longer code than it did during the size calculation pass. The same problem could occur without tag-based KASAN if one of the 16-bit words of the stack address happened to be all-ones during the size calculation pass. Fix the problem by assuming the worst case (4 instructions) when calculating the size of the bpf_tramp_image address emission.

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

• agent/references
• agent/title
• agent/type
• agent/description
• agent/first-publish-date
• agent/author
• agent/event
• collector/mitre-cve
• source/MITRE
• collector/nvd-api
• source/NVD
• agent/software-canonical-lookup
• agent/remedy
• agent/severity
• agent/weakness
• agent/softwarecombine
• agent/tags
• agent/last-modified-date
• vendor/linux
• canonical/linux linux kernel
• version/linux linux kernel/6.10.3
• version/linux linux kernel/6.11
• version/linux linux kernel/6.12-rc1
• version/linux linux kernel/6.12-rc2
• version/linux linux kernel/6.12-rc3
• version/linux linux kernel/6.12-rc4