CVE-2022-48929
bpf: Fix crash due to out of bounds access into reg2btf_ids.
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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.
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-08-21 CVE Reserved
- 2024-08-22 CVE Published
- 2024-08-23 EPSS Updated
- 2024-09-12 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
References (7)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/e8efe8369944c6199f124e3b50662ad05a048b60 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/931e56be527fb2672556e3c00c57ff2a5f5de43e | Vuln. Introduced | |
| https://git.kernel.org/stable/c/35ab8c9085b0af847df7fac9571ccd26d9f0f513 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/77459bc4d5e2c6f24db845780b4d9d60cf82d06a | Vuln. Introduced |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
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Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.15.15 < 5.15.37 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.15.15 < 5.15.37" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.16.1 < 5.16.12 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.16.1 < 5.16.12" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 5.10.92 Search vendor "Linux" for product "Linux Kernel" and version "5.10.92" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 5.16.11 Search vendor "Linux" for product "Linux Kernel" and version "5.16.11" | en |
Affected
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