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Fencer Vulns
high 7.8

CVE-2026-43078 json

crypto: af_alg - Fix page reassignment overflow in af_alg_pull_tsgl

published 2026-05-06 6 mo ago modified 2026-10-19 20 d ago also EUVD-2026-27567

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 2%
public exploits
0
none known

Summary

In the Linux kernel, the following vulnerability has been resolved:

crypto: af_alg - Fix page reassignment overflow in af_alg_pull_tsgl

When page reassignment was added to af_alg_pull_tsgl the original loop wasn't updated so it may try to reassign one more page than necessary.

Add the check to the reassignment so that this does not happen.

Also update the comment which still refers to the obsolete offset argument.

Patch / fix

  • Linux Linux 5.10.254, 5.15.204, 6.1.170, 6.6.137, 6.12.85, 6.18.24, 6.19.14, 7.0
  • linux Debian 12 6.1.170-1
  • linux Debian 13 6.12.85-1
  • linux Debian 14 6.19.14-1

debian advisories DEBIAN-CVE-2026-43078

  • linux Ubuntu 22.04 LTS 5.15.0-179.189
  • linux Ubuntu 24.04 LTS 6.8.0-117.117
  • linux Ubuntu 25.10 6.17.0-29.29
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1108.115
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1055.58
  • linux-aws Ubuntu 25.10 6.17.0-1015.15
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1108.117
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1058.61

ubuntu advisories UBUNTU-CVE-2026-43078

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-43078 updated cvss 7.3

kernel: crypto: af_alg - Fix page reassignment overflow in af_alg_pull_tsgl

  • Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more
    affected: workaround, no fix available, no fix planned “Will not fix”
  • Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more Red Hat Enterprise Linux 10 kernel
    affected: workaround, no fix available
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
24 d ago

Exploit prediction

0.13% chance of exploitation in the next 30 days, higher than 2% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Linux Linux

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.