CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
Low
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.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 22.04 | noarch | linux | < any | UNKNOWN |
ubuntu | 24.04 | noarch | linux | < any | UNKNOWN |
ubuntu | 22.04 | noarch | linux-aws | < any | UNKNOWN |
ubuntu | 24.04 | noarch | linux-aws | < any | UNKNOWN |
ubuntu | 20.04 | noarch | linux-aws-5.15 | < any | UNKNOWN |
ubuntu | 22.04 | noarch | linux-azure | < any | UNKNOWN |
ubuntu | 24.04 | noarch | linux-azure | < any | UNKNOWN |
ubuntu | 20.04 | noarch | linux-azure-5.15 | < any | UNKNOWN |
ubuntu | 22.04 | noarch | linux-azure-fde | < any | UNKNOWN |
ubuntu | 20.04 | noarch | linux-azure-fde-5.15 | < any | UNKNOWN |
git.kernel.org/linus/45ce4b4f9009102cd9f581196d480a59208690c1 (5.17-rc6)
git.kernel.org/stable/c/45ce4b4f9009102cd9f581196d480a59208690c1
git.kernel.org/stable/c/8c39925e98d498b9531343066ef82ae39e41adae
git.kernel.org/stable/c/f0ce1bc9e0235dd7412240be493d7ea65ed9eadc
launchpad.net/bugs/cve/CVE-2022-48929
nvd.nist.gov/vuln/detail/CVE-2022-48929
security-tracker.debian.org/tracker/CVE-2022-48929
www.cve.org/CVERecord?id=CVE-2022-48929