CVE-2022-49612
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-49612
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49612.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2022-49612
- Downstream
- Published
- 2025-02-26T02:23:34Z
- Modified
- 2025-10-21T10:25:32.167490Z
- Summary
- power: supply: core: Fix boundary conditions in interpolation
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
power: supply: core: Fix boundary conditions in interpolation
The functions powersupplytemp2resistsimple and powersupplyocv2capsimple handle boundary conditions incorrectly. The change was introduced in a4585ba2050f460f749bbaf2b67bd56c41e30283 ("power: supply: core: Use library interpolation"). There are two issues: First, the lines "high = i - 1" and "high = i" in ocv2cap have the wrong order compared to temp2resist. As a consequence, ocv2cap sets high=-1 if ocv>table[0].ocv, which causes an out-of-bounds read. Second, the logic of temp2resist is also not correct. Consider the case table[] = {{20, 100}, {10, 80}, {0, 60}}. For temp=5, we expect a resistance of 70% by interpolation. However, temp2resist sets high=low=2 and returns 60.
- 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
-
Introduceda4585ba2050f460f749bbaf2b67bd56c41e30283Fixeda762cee5d933fe4e2e1b773d60fc74fb8248d8c4
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduceda4585ba2050f460f749bbaf2b67bd56c41e30283Fixed093d27bb6f2d1963f927ef59c9a2d37059175426
Affected versions
v5.*
v5.16
v5.16-rc2
v5.16-rc3
v5.16-rc4
v5.16-rc5
v5.16-rc6
v5.16-rc7
v5.16-rc8
v5.17
v5.17-rc1
v5.17-rc2
v5.17-rc3
v5.17-rc4
v5.17-rc5
v5.17-rc6
v5.17-rc7
v5.17-rc8
v5.18
v5.18-rc1
v5.18-rc2
v5.18-rc3
v5.18-rc4
v5.18-rc5
v5.18-rc6
v5.18-rc7
v5.18.1
v5.18.10
v5.18.11
v5.18.12
v5.18.2
v5.18.3
v5.18.4
v5.18.5
v5.18.6
v5.18.7
v5.18.8
v5.18.9
v5.19-rc1
Database specific
vanir_signatures
[
{
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@093d27bb6f2d1963f927ef59c9a2d37059175426",
"id": "CVE-2022-49612-719578f9",
"deprecated": false,
"target": {
"function": "power_supply_temp2resist_simple",
"file": "drivers/power/supply/power_supply_core.c"
},
"signature_version": "v1",
"signature_type": "Function",
"digest": {
"length": 403.0,
"function_hash": "145619801073938342022833146317155243198"
}
},
{
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@a762cee5d933fe4e2e1b773d60fc74fb8248d8c4",
"id": "CVE-2022-49612-77436a79",
"deprecated": false,
"target": {
"function": "power_supply_ocv2cap_simple",
"file": "drivers/power/supply/power_supply_core.c"
},
"signature_version": "v1",
"signature_type": "Function",
"digest": {
"length": 399.0,
"function_hash": "46727690536452938527807042432470218771"
}
},
{
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@a762cee5d933fe4e2e1b773d60fc74fb8248d8c4",
"id": "CVE-2022-49612-92fda693",
"deprecated": false,
"target": {
"function": "power_supply_temp2resist_simple",
"file": "drivers/power/supply/power_supply_core.c"
},
"signature_version": "v1",
"signature_type": "Function",
"digest": {
"length": 403.0,
"function_hash": "145619801073938342022833146317155243198"
}
},
{
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@093d27bb6f2d1963f927ef59c9a2d37059175426",
"id": "CVE-2022-49612-bc7a8c76",
"deprecated": false,
"target": {
"function": "power_supply_ocv2cap_simple",
"file": "drivers/power/supply/power_supply_core.c"
},
"signature_version": "v1",
"signature_type": "Function",
"digest": {
"length": 399.0,
"function_hash": "46727690536452938527807042432470218771"
}
},
{
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@093d27bb6f2d1963f927ef59c9a2d37059175426",
"id": "CVE-2022-49612-bef2531d",
"deprecated": false,
"target": {
"file": "drivers/power/supply/power_supply_core.c"
},
"signature_version": "v1",
"signature_type": "Line",
"digest": {
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"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@a762cee5d933fe4e2e1b773d60fc74fb8248d8c4",
"id": "CVE-2022-49612-c6527b53",
"deprecated": false,
"target": {
"file": "drivers/power/supply/power_supply_core.c"
},
"signature_version": "v1",
"signature_type": "Line",
"digest": {
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]