# CVE-2026-72396: hwmon: adm1275: Prevent reading uninitialized stack

Status: published. Published: 2026-08-15. Updated: 2026-11-06.

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

hwmon: adm1275: Prevent reading uninitialized stack

While adding support for the ROHM BD127X0 hot-swap controllers, sashiko
reported an error in device-name comparison, which can lead to reading
uninitialized stack memory.

Quoting Sashiko:

This is a pre-existing issue, but I noticed that just before this block in
adm1275_probe(), there might be an out-of-bounds stack read:

    ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, block_buffer);
    if (ret < 0) { ... }
    for (mid = adm1275_id; mid->name[0]; mid++) {
            if (!strncasecmp(mid->name, block_buffer, strlen(mid->name)))
                    break;
    }

Since i2c_smbus_read_block_data() reads up to 32 bytes into the
uninitialized stack array block_buffer without appending a null
terminator, strncasecmp() could read past the valid bytes returned in ret.

For example, if the device returns a shorter string like "adm12", checking
it against "adm1275" up to the length of "adm1275" will continue reading
into uninitialized stack bounds.

Prevent reading uninitialized memory by zeroing the stack array.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ 87102808d03948c825c3bdc48316e48f6422fd7e; < 57d583f069fa9d3d0c0831e34b967d1f61edae94 (affected, git); ≥ 87102808d03948c825c3bdc48316e48f6422fd7e; < 82e4ab03a6ab9b87667410f5143bc484d7a62bdc (affected, git); ≥ 87102808d03948c825c3bdc48316e48f6422fd7e; < c9e04a52663bc6651c06c2427df088b751062bd6 (affected, git); ≥ 87102808d03948c825c3bdc48316e48f6422fd7e; < 39a581bd64a0e91112ec8017a2dd4e70c1336e99 (affected, git); ≥ 87102808d03948c825c3bdc48316e48f6422fd7e; < aa35cee30686e6be3c890bf741429c5025d55abe (affected, git); ≥ 87102808d03948c825c3bdc48316e48f6422fd7e; < 36554592e2f5cac16ff8bf73720d38a6d9ef4a20 (affected, git); ≥ 87102808d03948c825c3bdc48316e48f6422fd7e; < 93b96e723bdcba6172a5814262be875abcc5d269 (affected, git); ≥ 87102808d03948c825c3bdc48316e48f6422fd7e; < 553f9517813912a5ab661af5504485d96824a61c (affected, git). Source: CNA: Linux
- Linux / Linux: 3.3 (affected); ≥ 0; < 3.3 (unaffected, semver); ≥ 5.10.261; ≤ 5.10.* (unaffected, semver); ≥ 5.15.212; ≤ 5.15.* (unaffected, semver); ≥ 6.1.178; ≤ 6.1.* (unaffected, semver); ≥ 6.6.145; ≤ 6.6.* (unaffected, semver); ≥ 6.12.97; ≤ 6.12.* (unaffected, semver); ≥ 6.18.40; ≤ 6.18.* (unaffected, semver); ≥ 7.1.5; ≤ 7.1.* (unaffected, semver); ≥ 7.2; ≤ * (unaffected, original_commit_for_fix). Source: CNA: Linux

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: 0.22% as of 2026-11-06; percentile 12.54%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: Not reported

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://git.kernel.org/stable/c/57d583f069fa9d3d0c0831e34b967d1f61edae94 (CNA: Linux)

- https://git.kernel.org/stable/c/82e4ab03a6ab9b87667410f5143bc484d7a62bdc (CNA: Linux)

- https://git.kernel.org/stable/c/c9e04a52663bc6651c06c2427df088b751062bd6 (CNA: Linux)

- https://git.kernel.org/stable/c/39a581bd64a0e91112ec8017a2dd4e70c1336e99 (CNA: Linux)

- https://git.kernel.org/stable/c/aa35cee30686e6be3c890bf741429c5025d55abe (CNA: Linux)

- https://git.kernel.org/stable/c/36554592e2f5cac16ff8bf73720d38a6d9ef4a20 (CNA: Linux)

- https://git.kernel.org/stable/c/93b96e723bdcba6172a5814262be875abcc5d269 (CNA: Linux)

- https://git.kernel.org/stable/c/553f9517813912a5ab661af5504485d96824a61c (CNA: Linux)

- https://git.kernel.org/stable/c/36554592e2f5cac16ff8bf73720d38a6d9ef4a20 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/39a581bd64a0e91112ec8017a2dd4e70c1336e99 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/553f9517813912a5ab661af5504485d96824a61c (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/57d583f069fa9d3d0c0831e34b967d1f61edae94 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/82e4ab03a6ab9b87667410f5143bc484d7a62bdc (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/93b96e723bdcba6172a5814262be875abcc5d269 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/aa35cee30686e6be3c890bf741429c5025d55abe (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/c9e04a52663bc6651c06c2427df088b751062bd6 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2026-72396; retrieved 2026-11-06; source updated 2026-11-06

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-72396; retrieved 2026-11-06; source updated 2026-11-06

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-72396; retrieved 2026-11-06; source updated Not reported

Revision: 1bd4c686150f74939d3ab97658cc8515b400b40b5cfb2d2f93cc7e1e00e99445

Canonical: https://y2.dev/cve/CVE-2026-72396

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