CVE-2022-48929

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Source
https://cve.org/CVERecord?id=CVE-2022-48929
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-48929.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2022-48929
Downstream
Related
Published
2024-08-22T03:31:22Z
Modified
2026-08-12T03:30:46Z
Summary
bpf: Fix crash due to out of bounds access into reg2btf_ids.
Details

In the Linux kernel, the following vulnerability has been resolved:

bpf: Fix crash due to out of bounds access into reg2btf_ids.

When commit e6ac2450d6de ("bpf: Support bpf program calling kernel function") added kfunc support, it defined reg2btf_ids as a cheap way to translate the verifier reg type to the appropriate btf_vmlinux BTF ID, however commit c25b2ae13603 ("bpf: Replace PTR_TO_XXX_OR_NULL with PTR_TO_XXX | PTR_MAYBE_NULL") moved the __BPF_REG_TYPE_MAX from the last member of bpf_reg_type enum to after the base register types, and defined other variants using type flag composition. However, now, the direct usage of reg->type to index into reg2btf_ids may no longer fall into __BPF_REG_TYPE_MAX range, and hence lead to out of bounds access and kernel crash on dereference of bad pointer.

Database specific 
{
    "cna_assigner":  "Linux",
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/48xxx/CVE-2022-48929.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
8d38cde47a7e17b646401fa92d916503caa5375e
Fixed
8c39925e98d498b9531343066ef82ae39e41adae
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
77459bc4d5e2c6f24db845780b4d9d60cf82d06a
Fixed
f0ce1bc9e0235dd7412240be493d7ea65ed9eadc
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
c25b2ae136039ffa820c26138ed4a5e5f3ab3841
Fixed
45ce4b4f9009102cd9f581196d480a59208690c1

Affected versions

v5.*
v5.16.11

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-48929.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
5.16.11
Fixed
5.16.12

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-48929.json"