High severity · published May 1, 2026
CVE-2026-43030
bpf: Fix regsafe() for pointers to packet
7.8
CVSS
0.1%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 3% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
5.10.155 before 5.10.253; 5.11 before 5.15.203; 5.16 before 6.1.168; 6.2 before 6.6.134; 6.7 before 6.12.81; 6.13 before 6.18.22; +7 more · source: NVD
LI
Linux · Linux
95b6ec733752b31bfd166c4609d2c1b5cdde9b47 before b52f6d0ef7b308f9d05bbddb78749852f28e8e40; 6d94e741a8ff818e5518da8257f5ca0aaed1f269 before 37db6b9726d0bcf91cbdf9d63b558c50da49f968; 6d94e741a8ff818e5518da8257f5ca0aaed1f269 before 015a74476dc1ab6923d89f1ee009aaf43faa7185; 6d94e741a8ff818e5518da8257f5ca0aaed1f269 before b99d82706bd1511bb875e3de7154698fd9215c99; 6d94e741a8ff818e5518da8257f5ca0aaed1f269 before 7241da033fdc507b920e092dab1f97b945cb0370; 6d94e741a8ff818e5518da8257f5ca0aaed1f269 before 8aebe18069394f4a79d2d82080a0f806da449996; +4 more · source: vendor
SS
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP · Siemens
V3.1.6; V3.1.5; V3.1.7; V3.1.6; V3.1.5; V3.1.7 · source: CISA
SS
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP · Siemens
V3.1.6; V3.1.5; V3.1.7; V3.1.6; V3.1.5; V3.1.7 · source: CISA
SS
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP · Siemens
V3.1.6; V3.1.5; V3.1.7 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-43030
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-43030
Patch
https://git.kernel.org/stable/c/015a74476dc1ab6923d89f1ee009aaf43faa7185
Patch
https://git.kernel.org/stable/c/37db6b9726d0bcf91cbdf9d63b558c50da49f968
Patch
https://git.kernel.org/stable/c/7241da033fdc507b920e092dab1f97b945cb0370
Patch
https://git.kernel.org/stable/c/8aebe18069394f4a79d2d82080a0f806da449996
Patch
https://git.kernel.org/stable/c/a8502a79e832b861e99218cbd2d8f4312d62e225
Patch
https://git.kernel.org/stable/c/b52f6d0ef7b308f9d05bbddb78749852f28e8e40
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