Medium 5.5Published May 1, 2024

CVE-2024-26973fat: fix uninitialized field in nostale filehandles

Updated under an hour ago (2026-10-19 07:00 UTC)

Does this affect you?

It affects Linux and 6 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Linux

Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: fat: fix uninitialized field in nostale filehandles When fat_encode_fh_nostale() encodes file handle without a parent it stores only first 10 bytes of the file handle. However the length of the file handle must be a multiple of 4 so the file handle is actually 12 bytes long and the last two bytes remain uninitialized. This is not great at we potentially leak uninitialized information with the handle to userspace. Properly initialize the full handle length.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 15, 2026
First seen by InfoSec Signals: Oct 15, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from ea3983ace6b79c96e6ab3d3837e2eaf81ab881e2 before 9840d1897e28f8733cc1e38f97e044f987dc0a63; from ea3983ace6b79c96e6ab3d3837e2eaf81ab881e2 before f52d7663a10a1266a2d3871a6dd8fd111edc549f; from ea3983ace6b79c96e6ab3d3837e2eaf81ab881e2 before a276c595c3a629170b0f052a3724f755d7c6adc6; from ea3983ace6b79c96e6ab3d3837e2eaf81ab881e2 before b7fb63e807c6dadf7ecc1d43448c4f1711d7eeee; from ea3983ace6b79c96e6ab3d3837e2eaf81ab881e2 before c8cc05de8e6b5612b6e9f92c385c1a064b0db375; from ea3983ace6b79c96e6ab3d3837e2eaf81ab881e2 before 03a7e3f2ba3ca25f1da1d3898709a08db14c1abb; from ea3983ace6b79c96e6ab3d3837e2eaf81ab881e2 before 74f852654b8b7866f15323685f1e178d3386c688; from ea3983ace6b79c96e6ab3d3837e2eaf81ab881e2 before cdd33d54e789d229d6d5007cbf3f53965ca1a5c6; and 1 more ranges	CNA record
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.0 before V3.1.5	CISA ADP
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name)	from V3.1.0 before V3.1.5	CISA ADP
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name)	before V1.1.1	CISA ADP
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.0 before V3.1.5	CISA ADP
linux linux_kernel linux:linux_kernel	from 3.10 before 4.19.312; from 4.20 before 5.4.274; from 5.5 before 5.10.215; from 5.11 before 5.15.154; from 5.16 before 6.1.84; from 6.2 before 6.6.24; from 6.7 before 6.7.12; from 6.8 before 6.8.3	NVD
debian debian_linux debian:debian_linux	10.0	NVD

References

https://git.kernel.org/stable/c/9840d1897e28f8733cc1e38f97e044f987dc0a63mailing-list, patch
https://git.kernel.org/stable/c/f52d7663a10a1266a2d3871a6dd8fd111edc549fmailing-list, patch
https://git.kernel.org/stable/c/a276c595c3a629170b0f052a3724f755d7c6adc6mailing-list, patch
https://git.kernel.org/stable/c/b7fb63e807c6dadf7ecc1d43448c4f1711d7eeeemailing-list, patch
https://git.kernel.org/stable/c/c8cc05de8e6b5612b6e9f92c385c1a064b0db375mailing-list, patch
https://git.kernel.org/stable/c/03a7e3f2ba3ca25f1da1d3898709a08db14c1abbmailing-list, patch
https://git.kernel.org/stable/c/74f852654b8b7866f15323685f1e178d3386c688mailing-list, patch
https://git.kernel.org/stable/c/cdd33d54e789d229d6d5007cbf3f53965ca1a5c6mailing-list, patch
https://git.kernel.org/stable/c/fde2497d2bc3a063d8af88b258dbadc86bd7b57cmailing-list, patch
https://lists.debian.org/debian-lts-announce/2024/06/msg00017.htmlmailing-list
https://lists.debian.org/debian-lts-announce/2024/06/msg00020.htmlmailing-list
https://cert-portal.siemens.com/productcert/html/ssa-265688.html
https://cert-portal.siemens.com/productcert/html/ssa-398330.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.