CVE-2026-74693 json
net: prestera: validate firmware header length
published 2026-08-22 2 mo ago modified 2026-10-14 25 d ago also EUVD-2026-64380
- cvss
- —
- not scored
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 7%
- public exploits
- 0
- none known
Summary
In the Linux kernel, the following vulnerability has been resolved:
net: prestera: validate firmware header length
prestera_fw_hdr_parse() reads the firmware header before checking that the firmware image contains that header.
Reject images shorter than struct prestera_fw_header before decoding the magic and version fields.
Patch / fix
- Linux Linux 5.10.265, 5.15.216, 6.1.183, 6.6.152, 6.12.104, 6.18.45, 7.1.9, 7.2
- linux Debian 12 6.1.187-1
- linux Debian 13 6.12.105-1
- linux Debian 14 7.1.9-1
- linux-6.12 Debian 12 6.12.107-1~deb12u1
debian advisories DEBIAN-CVE-2026-74693
- linux Ubuntu 22.04 LTS 5.15.0-198.208
- linux Ubuntu 26.04 LTS 7.0.0-42.42
- linux-aws Ubuntu 22.04 LTS 5.15.0-1117.124
- linux-aws Ubuntu 26.04 LTS 7.0.0-1016.17
- linux-gcp Ubuntu 22.04 LTS 5.15.0-1118.128
- linux-gcp Ubuntu 26.04 LTS 7.0.0-1016.18
- linux-gke Ubuntu 22.04 LTS 5.15.0-1113.119
- linux-ibm Ubuntu 22.04 LTS 5.15.0-1111.115
ubuntu advisories UBUNTU-CVE-2026-74693
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
- git.kernel.org/stable/c/38a3afbf9fd8a2e8c47fa3ca47b425a8a9623240 commit
- git.kernel.org/stable/c/0fbcceb9d19f2d1dcdf099aee590f2517cb718bb commit
- git.kernel.org/stable/c/e0f382e8084117f0b11ffb070fe1079e38c0d7f9 commit
- git.kernel.org/stable/c/6fad06bb793d7089ae05b9fcf46e11be2dfe4850 commit
- git.kernel.org/stable/c/470ac9cce7308e60cf2dceb448749cdd006e73de commit
- git.kernel.org/stable/c/363e048a9d0a6c245cbc348c8a220170afed046a commit
- git.kernel.org/stable/c/7fa8a12296d8d5aa4b1c3904f0b354d81124cf29 commit
- git.kernel.org/stable/c/8ae344eb540af3f457179b52bc6061416752485c commit
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-2026-74693 updated cvss 5.5
kernel: net: prestera: validate firmware header length
-
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 Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more Red Hat Enterprise Linux 10 kernelnot 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
Exploit prediction
0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-08).
Affected products
- Linux Linux
Classification
- Technology feeds
References
- git.kernel.org /stable/c/38a3afbf9fd8a2e8c47fa3ca47b425a8a9623240
- git.kernel.org /stable/c/0fbcceb9d19f2d1dcdf099aee590f2517cb718bb
- git.kernel.org /stable/c/e0f382e8084117f0b11ffb070fe1079e38c0d7f9
- git.kernel.org /stable/c/6fad06bb793d7089ae05b9fcf46e11be2dfe4850
- git.kernel.org /stable/c/470ac9cce7308e60cf2dceb448749cdd006e73de
- git.kernel.org /stable/c/363e048a9d0a6c245cbc348c8a220170afed046a
- git.kernel.org /stable/c/7fa8a12296d8d5aa4b1c3904f0b354d81124cf29
- git.kernel.org /stable/c/8ae344eb540af3f457179b52bc6061416752485c
Sources
- CVE List CVE-2026-74693
- NVD CVE-2026-74693
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.