7.8

CVE-2026-80931: linux

CVSS: 7.8v3.1HighReceived
AliasesUBUNTU-CVE-2026-80931DEBIAN-CVE-2026-80931
Published 11-09-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-80931 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.3% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.13%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2026:11805-1

Timeline

  1. 11-09-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.13%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

0.00 pp

From 0.13% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.13%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu168 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linuxAll versions (No fix recorded) | < 6.1.190-1 | < 6.12.111-1 | < 7.2.6-1
  • linux-6.12< 6.12.111-1~deb12u1
Linux1 product
  • linux≥ ebc4768ac4971eab4b570e733e47ac9dfd0e4175, < b30c021c6073559ea6851b522d8a17a524a27b4a | ≥ ebc4768ac4971eab4b570e733e47ac9dfd0e4175, < 1d08877fc37e90945df38d255715bd1d6c052d46 | ≥ ebc4768ac4971eab4b570e733e47ac9dfd0e4175, < bf76d61e118b7044600a65775a3bf8adc2c6823d | ≥ ebc4768ac4971eab4b570e733e47ac9dfd0e4175, < 0f6496b34cc2919420f303b2aabdd9f71e084b56 | ≥ ebc4768ac4971eab4b570e733e47ac9dfd0e4175, < cb55c5da9828f77db2a2701316949d4de1e9b773 | ≥ ebc4768ac4971eab4b570e733e47ac9dfd0e4175, < ae0c79a8527044e54d81fd5a3b49ce6177633758 | ≥ ebc4768ac4971eab4b570e733e47ac9dfd0e4175, < 6df05f630c84a109736642362e452089886f9974 | ≥ ebc4768ac4971eab4b570e733e47ac9dfd0e4175, < 169ae5e65e5aaf213b6a578f6478a9fd2e523606 | 4.15

3 vendors · 171 products

References

13 links
Show all 13 references