w1: ds28e17: reject an oversize length on an I2C block read
In the Linux kernel, the following vulnerability has been resolved: w1: ds28e17: reject an oversize length on an I2C block read w1_f19_i2c_master_transfer() is the master_xfer for the DS28E17 1-Wire to I2C bridge. On an I2C_M_RECV_LEN read, it takes the length from the device. The downstream slave puts a length byte in buf[0]. The driver then reads that many bytes into buf[1] with w1_f19_i2c_read(). buf[0] is controlled by the device and can be 0 to 255. w1_f19_i2c_read() only rejects a zero count. The caller buffer is I2C_SMBUS_BLOCK_MAX + 2, so 34 bytes. A length above 32 makes the read run past it, up to about 222 bytes out of bounds. The SMBus core does check buf[0] against I2C_SMBUS_BLOCK_MAX. That check runs after master_xfer returns. By then the write is already done. i2c-algo-bit rejects an oversize length before it copies, and returns -EPROTO. Reject a length above I2C_SMBUS_BLOCK_MAX at both RECV_LEN sites, the same way i2c-algo-bit does.
CVE-2026-80931
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-80931
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "ebc4768ac4971eab4b570e733e47ac9dfd0e4175",
"lessThan": "b30c021c6073559ea6851b522d8a17a524a27b4a",
"versionType": "git"
},
{
"status": "affected",
"version": "ebc4768ac4971eab4b570e733e47ac9dfd0e4175",
"lessThan": "1d08877fc37e90945df38d255715bd1d6c052d46",
"versionType": "git"
},
{
"status": "affected",
"version": "ebc4768ac4971eab4b570e733e47ac9dfd0e4175",
"lessThan": "bf76d61e118b7044600a65775a3bf8adc2c6823d",
"versionType": "git"
},
{
"status": "affected",
"version": "ebc4768ac4971eab4b570e733e47ac9dfd0e4175",
"lessThan": "0f6496b34cc2919420f303b2aabdd9f71e084b56",
"versionType": "git"
},
{
"status": "affected",
"version": "ebc4768ac4971eab4b570e733e47ac9dfd0e4175",
"lessThan": "cb55c5da9828f77db2a2701316949d4de1e9b773",
"versionType": "git"
},
{
"status": "affected",
"version": "ebc4768ac4971eab4b570e733e47ac9dfd0e4175",
"lessThan": "ae0c79a8527044e54d81fd5a3b49ce6177633758",
"versionType": "git"
},
{
"status": "affected",
"version": "ebc4768ac4971eab4b570e733e47ac9dfd0e4175",
"lessThan": "6df05f630c84a109736642362e452089886f9974",
"versionType": "git"
},
{
"status": "affected",
"version": "ebc4768ac4971eab4b570e733e47ac9dfd0e4175",
"lessThan": "169ae5e65e5aaf213b6a578f6478a9fd2e523606",
"versionType": "git"
}
],
"programFiles": [
"drivers/w1/slaves/w1_ds28e17.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.15"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.15",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.270",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.109",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/w1/slaves/w1_ds28e17.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-80931
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #34892 · Revision 1
- Added to Heist Feed
- Publisher date