CVE-2026-43134: linux
CVSS: 8.1v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-43134DEBIAN-CVE-2026-43134
Published 06-05-2026Last modified 16-10-2026
Vulnerability summary
CVE-2026-43134 is a high (CVSS 8.1) vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 13.7% of scored vulnerabilities.
CVSS score
8.1/10
010
High · v3.1 (CVE.org)EPSS score
0.24%
0%100%
Low · +0.06 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 38 · Related 38OPENSUSE-SU-2026:21555-1SUSE-SU-2026:23066-1SUSE-SU-2026:23068-1SUSE-SU-2026:23193-1SUSE-SU-2026:23194-1SUSE-SU-2026:23221-1SUSE-SU-2026:23231-1SUSE-SU-2026:23237-1SUSE-SU-2026:23241-1SUSE-SU-2026:23244-1SUSE-SU-2026:3130-1SUSE-SU-2026:3166-1SUSE-SU-2026:4282-1USN-8492-1USN-8492-2USN-8492-3USN-8492-4USN-8492-5USN-8497-1USN-8498-1USN-8499-1USN-8575-1USN-8575-2USN-8575-3USN-8576-1USN-8576-2USN-8597-1USN-8606-1USN-8607-1USN-8609-1USN-8610-1USN-8619-1USN-8620-1USN-8620-2USN-8620-3USN-8620-4USN-8668-1USN-8668-2
Timeline
- 06-05-2026PublishedVulnerability first disclosed.
- 16-10-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix missing key size check for L2CAP_LE_CONN_REQ This adds a check for encryption key size upon receiving L2CAP_LE_CONN_REQ which is required by L2CAP/LE/CFC/BV-15-C which expects L2CAP_CR_LE_BAD_KEY_SIZE.
CVSS metrics
5 scores · 4 sources · 2 versionsMedium 5.3Preferred score · OSV · Ubuntu (Ecosystem advisory) · calculated from vector
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:NSourcesSingle source
High 8.1Preferred score · CVE.org (CNA)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:NSourcesAll 4 agree
- OSV · UbuntuEcosystem advisory · calculated8.1HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- OSV · DebianEcosystem advisory · calculated8.1HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- NVDNIST8.1HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS trend
Probability
0.24%
Chance of exploitation in the next 30 days
Percentile
14%
Versus all other CVEs
30-day change
+0.06 pp
From 0.18% on 19-09-2026
19-09-202619-10-2026
EPSS score0.24%
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
Ubuntu157 products
- linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-134.134
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1060.63
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d, < 335071c0c3637064ec250481f589075db44fe4e6 | ≥ 27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d, < fa6ad76fa8623c0a50d529cd5726fa5d819a3be4 | ≥ 27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d, < 9118601ff90b79e8df3c0c98f48ae00c1b02ecef | ≥ 27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d, < 481ea39b342c347b6ac029f3d418486280be4e45 | ≥ 27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d, < ec91078e132179b04e0c3906b599816c056ceaad | ≥ 27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d, < 96581749c7c14fbec32c35728520867929600041 | ≥ 27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d, < 8dd43f9a9323f9c01bc8246da8d81a4c783c9e97 | ≥ 27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d, < 138d7eca445ef37a0333425d269ee59900ca1104 | 3.14
- linux_kernel≥ 3.14, < 5.10.252 | ≥ 5.11, < 5.15.202 | ≥ 5.16, < 6.1.165 | ≥ 6.2, < 6.6.128 | ≥ 6.7, < 6.12.75 | ≥ 6.13, < 6.18.16 | ≥ 6.19, < 6.19.6 | 7.0:rc1
Debian1 product
- linux< 6.1.170-1 | < 6.12.85-1 | < 6.19.6-1
3 vendors · 160 products
