CVE-2024-49948net: add more sanity checks to qdisc_pkt_len_init()
Updated under an hour ago ()
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It affects Linux and 8 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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In 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.
- 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
Linux Linux linux:linux (from the name) | from 1def9238d4aa2146924994aa4b7dc861f03b9362 before d7d1a28f5dd57b4d83def876f8d7b4403bd37df9; from 1def9238d4aa2146924994aa4b7dc861f03b9362 before 473426a1d53a68dd1e718e6cd00d57936993fa6c; from 1def9238d4aa2146924994aa4b7dc861f03b9362 before 566a931a1436d0e0ad13708ea55479b95426213c; from 1def9238d4aa2146924994aa4b7dc861f03b9362 before 2415f465730e48b6e38da1c7c097317bf5dd2d20; from 1def9238d4aa2146924994aa4b7dc861f03b9362 before 27a8fabc54d2f960d47bdfbebf2bdc6e8a92a4c4; from 1def9238d4aa2146924994aa4b7dc861f03b9362 before 9b0ee571d20a238a22722126abdfde61f1b2bdd0; from 1def9238d4aa2146924994aa4b7dc861f03b9362 before ff1c3cadcf405ab37dd91418a62a7acecf3bc5e2; from 1def9238d4aa2146924994aa4b7dc861f03b9362 before 1eebe602a8d8264a12e35e39d0645fa88dbbacdd; 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 |
Siemens RUGGEDCOM RST2428P siemens:ruggedcom_rst2428p (from the name) | before V3.2 | CISA ADP |
Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family siemens:scalance_xc_300_xr_300_xc_400_xr_500wg_xr_500_family (from the name) | before V3.2 | CISA ADP |
Siemens SCALANCE XCM-/XRM-/XCH-/XRH-300 family siemens:scalance_xcm_xrm_xch_xrh_300_family (from the name) | before V3.2 | CISA ADP |
linux linux_kernel linux:linux_kernel | from 3.9 before 4.19.323; from 4.20 before 5.4.285; from 5.5 before 5.10.227; from 5.11 before 5.15.168; from 5.16 before 6.1.113; from 6.2 before 6.6.55; from 6.7 before 6.10.14; from 6.11 before 6.11.3; and 1 more ranges | NVD |
References
- https://git.kernel.org/stable/c/d7d1a28f5dd57b4d83def876f8d7b4403bd37df9patch
- https://git.kernel.org/stable/c/473426a1d53a68dd1e718e6cd00d57936993fa6cpatch
- https://git.kernel.org/stable/c/566a931a1436d0e0ad13708ea55479b95426213cpatch
- https://git.kernel.org/stable/c/2415f465730e48b6e38da1c7c097317bf5dd2d20patch
- https://git.kernel.org/stable/c/27a8fabc54d2f960d47bdfbebf2bdc6e8a92a4c4patch
- https://git.kernel.org/stable/c/9b0ee571d20a238a22722126abdfde61f1b2bdd0patch
- https://git.kernel.org/stable/c/ff1c3cadcf405ab37dd91418a62a7acecf3bc5e2patch
- https://git.kernel.org/stable/c/1eebe602a8d8264a12e35e39d0645fa88dbbacddpatch
- https://git.kernel.org/stable/c/ab9a9a9e9647392a19e7a885b08000e89c86b535patch
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- https://cert-portal.siemens.com/productcert/html/ssa-355557.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.