7.8

CVE-2026-43030: bpf: Fix regsafe() for pointers to packet

Modified
AliasesUBUNTU-CVE-2026-43030DEBIAN-CVE-2026-43030
Published 01-05-2026Last modified 19-10-2026

Vulnerability summary

CVE-2026-43030 is a high (CVSS 7.8) Incorrect Calculation vulnerability in linux. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 7.5% 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
0.18%
0%100%
Low · +0.05 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 41 · Related 38
LSN-0122-1MGASA-2026-0108MGASA-2026-0110OPENSUSE-SU-2026:20965-1SUSE-SU-2026:22099-1SUSE-SU-2026:22108-1

Timeline

  1. 01-05-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix regsafe() for pointers to packet In case rold->reg->range == BEYOND_PKT_END && rcur->reg->range == N regsafe() may return true which may lead to current state with valid packet range not being explored. Fix the bug.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.18%

Chance of exploitation in the next 30 days

Percentile

8%

Versus all other CVEs

30-day change

Increase +0.05 pp

From 0.14% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu145 products
  • linux< 5.15.0-186.196 | < 6.8.0-136.136 | All versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1112.119 | < 6.8.0-1061.64 | All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 95b6ec733752b31bfd166c4609d2c1b5cdde9b47, < b52f6d0ef7b308f9d05bbddb78749852f28e8e40 | ≥ 6d94e741a8ff818e5518da8257f5ca0aaed1f269, < 37db6b9726d0bcf91cbdf9d63b558c50da49f968 | ≥ 6d94e741a8ff818e5518da8257f5ca0aaed1f269, < 015a74476dc1ab6923d89f1ee009aaf43faa7185 | ≥ 6d94e741a8ff818e5518da8257f5ca0aaed1f269, < b99d82706bd1511bb875e3de7154698fd9215c99 | ≥ 6d94e741a8ff818e5518da8257f5ca0aaed1f269, < 7241da033fdc507b920e092dab1f97b945cb0370 | ≥ 6d94e741a8ff818e5518da8257f5ca0aaed1f269, < 8aebe18069394f4a79d2d82080a0f806da449996 | ≥ 6d94e741a8ff818e5518da8257f5ca0aaed1f269, < ca995b1462ec6db1e869100ba1fb7356bd3f22f0 | ≥ 6d94e741a8ff818e5518da8257f5ca0aaed1f269, < a8502a79e832b861e99218cbd2d8f4312d62e225 | ≥ 5.10.155, < 5.10.253 | 5.11
  • linux_kernel≥ 5.10.155, < 5.10.253 | ≥ 5.11, < 5.15.203 | ≥ 5.16, < 6.1.168 | ≥ 6.2, < 6.6.134 | ≥ 6.7, < 6.12.81 | ≥ 6.13, < 6.18.22 | ≥ 6.19, < 6.19.12 | 7.0:rc1 | 7.0:rc2 | 7.0:rc3 | 7.0:rc4 | 7.0:rc5 | 7.0:rc6
Debian1 product
  • linux< 6.1.170-1 | < 6.12.85-1 | < 6.19.12-1

3 vendors · 148 products

References

42 links
Show all 42 references