CVE-2026-72318: linux
Vulnerability summary
CVE-2026-72318 is a critical (CVSS 9.4) vulnerability in linux. EPSS estimates a 0.59% chance of exploitation in the next 30 days, higher than 46.9% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 12 · Related 9Timeline
- 15-08-2026PublishedVulnerability first disclosed.
- 16-10-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: cifs: validate DFS referral string offsets parse_dfs_referrals() validates that the response header and referral array fit in the received buffer, but each referral also contains string offsets supplied by the server. Those offsets are used to compute the DfsPath and NetworkAddress string pointers without checking whether they still point inside the response buffer. A malformed referral can therefore make the computed pointer exceed the end of the buffer. The resulting negative max_len is then passed to cifs_strndup_from_utf16(), and the non-Unicode path forwards it to kstrndup() as a size_t, allowing strnlen() to read out of bounds. Validate each string offset before deriving the string pointer.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated9.4CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H
- OSV · DebianEcosystem advisory · calculated9.4CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H
- NVDNIST9.4CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H
EPSS trend
Probability
0.59%
Chance of exploitation in the next 30 days
Percentile
47%
Versus all other CVEs
30-day change
0.00 pp
From 0.59% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Ubuntu168 products
- linuxAll versions (No fix recorded) | < 6.8.0-147.147 | < 7.0.0-34.34
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 6.8.0-1067.70 | < 7.0.0-1013.13
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Debian1 product
- linux< 6.1.180-1 | < 6.12.100-1 | < 7.1.5-1
Linux1 product
- linux≥ 4ecce920e13ace16a5ba45efe8909946c28fb2ad, < 76c607b9353d377b1d1b11db50e743eee0ccf658 | ≥ 4ecce920e13ace16a5ba45efe8909946c28fb2ad, < d64b6be5740ce230aca184d8d224c75d9866045d | ≥ 4ecce920e13ace16a5ba45efe8909946c28fb2ad, < 929a85932d14190988f1eafd6ee8cc68d66ace0b | ≥ 4ecce920e13ace16a5ba45efe8909946c28fb2ad, < b784cd1c24d89bf71be2efe1e948ff7c03371e57 | ≥ 4ecce920e13ace16a5ba45efe8909946c28fb2ad, < c37abc99bb3de3d3219ecef253d649f74117fd83 | ≥ 4ecce920e13ace16a5ba45efe8909946c28fb2ad, < 027a84ac6b50c12ef767c15abfc58aa865820e9e | 4.11
3 vendors · 170 products
