CVE-2026-46088: linux
Vulnerability summary
CVE-2026-46088 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 5.5% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 47 · Related 47Timeline
- 27-05-2026PublishedVulnerability first disclosed.
- 15-10-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: control: Validate buf_len before strnlen() in snd_ctl_elem_init_enum_names() snd_ctl_elem_init_enum_names() advances pointer p through the names buffer while decrementing buf_len. If buf_len reaches zero but items remain, the next iteration calls strnlen(p, 0). While strnlen(p, 0) returns 0 and would hit the existing name_len == 0 error path, CONFIG_FORTIFY_SOURCE's fortified strnlen() first checks maxlen against __builtin_dynamic_object_size(). When Clang loses track of p's object size inside the loop, this triggers a BRK exception panic before the return value is examined. Add a buf_len == 0 guard at the loop entry to prevent calling fortified strnlen() on an exhausted buffer. Found by kernel fuzz testing through Xiaomi Smartphone.
CVSS metrics
3 scores · 3 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.17%
Chance of exploitation in the next 30 days
Percentile
6%
Versus all other CVEs
30-day change
+0.04 pp
From 0.12% on 21-09-2026
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
Ubuntu159 products
- linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-136.136 | < 7.0.0-27.27
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1061.64 | < 7.0.0-1008.8
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4, < 708f6ec9bcdf58bfd561409110baaf4fd3be4ea3 | ≥ 8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4, < bfcbb4994da9e979c4bcfcf24aaaac69e457e48e | ≥ 8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4, < a470f7cabc4df72d9bd132f5719a8717292bb440 | ≥ 8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4, < 1fbe46d2b72754d8bd580e13e59ccb5d3d0e8cb0 | ≥ 8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4, < 8ba0214c3dd32b8ec652947e3f2bc5b8f6e6be9e | ≥ 8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4, < 654c818a69c21d2bea4e8fd9eae7da865df9a5c8 | ≥ 8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4, < 82012fd3e78a14360fbc2f1a7491589896704f97 | ≥ 8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4, < e0da8a8cac74f4b9f577979d131f0d2b88a84487 | 3.2
- linux_kernel≥ 3.2, < 5.10.258 | ≥ 5.11, < 5.15.209 | ≥ 5.16, < 6.1.175 | ≥ 6.2, < 6.6.140 | ≥ 6.7, < 6.12.86 | ≥ 6.13, < 6.18.27 | ≥ 6.19, < 7.0.4
Debian1 product
- linux< 6.1.176-1 | < 6.12.86-1 | < 7.0.4-1
3 vendors · 162 products
