net: add more sanity checks to qdisc_pkt_len_init()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2024-49948
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2024-10-21 18:15:16 UTC
Updated2026-05-12 12:17:18 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: net: add more sanity checks to qdisc_pkt_len_init() One path takes care of SKB_GSO_DODGY, assuming skb->len is bigger than hdr_len. virtio_net_hdr_to_skb() does not fully dissect TCP headers, it only make sure it is at least 20 bytes. It is possible for an user to provide a malicious 'GSO' packet, total length of 80 bytes. - 20 bytes of IPv4 header - 60 bytes TCP header - a small gso_size like 8 virtio_net_hdr_to_skb() would declare this packet as a normal GSO packet, because it would see 40 bytes of payload, bigger than gso_size. We need to make detect this case to not underflow qdisc_skb_cb(skb)->pkt_len.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem Types: NVD-CWE-noinfo

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 1def9238d4aa2146924994aa4b7dc861f03b9362 d7d1a28f5dd57b4d83def876f8d7b4403bd37df9 git Not specified
CNA Linux Linux affected 1def9238d4aa2146924994aa4b7dc861f03b9362 473426a1d53a68dd1e718e6cd00d57936993fa6c git Not specified
CNA Linux Linux affected 1def9238d4aa2146924994aa4b7dc861f03b9362 566a931a1436d0e0ad13708ea55479b95426213c git Not specified
CNA Linux Linux affected 1def9238d4aa2146924994aa4b7dc861f03b9362 2415f465730e48b6e38da1c7c097317bf5dd2d20 git Not specified
CNA Linux Linux affected 1def9238d4aa2146924994aa4b7dc861f03b9362 27a8fabc54d2f960d47bdfbebf2bdc6e8a92a4c4 git Not specified
CNA Linux Linux affected 1def9238d4aa2146924994aa4b7dc861f03b9362 9b0ee571d20a238a22722126abdfde61f1b2bdd0 git Not specified
CNA Linux Linux affected 1def9238d4aa2146924994aa4b7dc861f03b9362 ff1c3cadcf405ab37dd91418a62a7acecf3bc5e2 git Not specified
CNA Linux Linux affected 1def9238d4aa2146924994aa4b7dc861f03b9362 1eebe602a8d8264a12e35e39d0645fa88dbbacdd git Not specified
CNA Linux Linux affected 1def9238d4aa2146924994aa4b7dc861f03b9362 ab9a9a9e9647392a19e7a885b08000e89c86b535 git Not specified
CNA Linux Linux affected 3.9 Not specified
CNA Linux Linux unaffected 3.9 semver Not specified
CNA Linux Linux unaffected 4.19.323 4.19.* semver Not specified
CNA Linux Linux unaffected 5.4.285 5.4.* semver Not specified
CNA Linux Linux unaffected 5.10.227 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.168 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.113 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.55 6.6.* semver Not specified
CNA Linux Linux unaffected 6.10.14 6.10.* semver Not specified
CNA Linux Linux unaffected 6.11.3 6.11.* semver Not specified
CNA Linux Linux unaffected 6.12 * original_commit_for_fix Not specified
ADP Siemens RUGGEDCOM RST2428P affected V3.2 custom Not specified
ADP Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 Family affected V3.2 custom Not specified
ADP Siemens SCALANCE XCM-/XRM-/XCH-/XRH-300 Family affected V3.2 custom Not specified
ADP Siemens SIMATIC S7-1500 TM MFP - GNU/Linux Subsystem affected * custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified

References

ReferenceSourceLinkTags
cert-portal.siemens.com/productcert/html/ssa-398330.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/1eebe602a8d8264a12e35e39d0645fa88dbbacdd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/ab9a9a9e9647392a19e7a885b08000e89c86b535 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2025/03/msg00002.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
git.kernel.org/stable/c/27a8fabc54d2f960d47bdfbebf2bdc6e8a92a4c4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/566a931a1436d0e0ad13708ea55479b95426213c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/ff1c3cadcf405ab37dd91418a62a7acecf3bc5e2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
cert-portal.siemens.com/productcert/html/ssa-265688.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/d7d1a28f5dd57b4d83def876f8d7b4403bd37df9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/9b0ee571d20a238a22722126abdfde61f1b2bdd0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/2415f465730e48b6e38da1c7c097317bf5dd2d20 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
cert-portal.siemens.com/productcert/html/ssa-355557.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
lists.debian.org/debian-lts-announce/2025/01/msg00001.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
git.kernel.org/stable/c/473426a1d53a68dd1e718e6cd00d57936993fa6c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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