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CVE-2024-49948— net: add more sanity checks to qdisc_pkt_len_init()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于net组件中对qdisc_pkt_len_init函数的更多合理性检查不足。

AI Predicted 6.5 Difficulty: Moderate EPSS 0.29% · P20

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux 1def9238d4aa2146924994aa4b7dc861f03b9362< d7d1a28f5dd57b4d83def876f8d7b4403bd37df9 affected
1def9238d4aa2146924994aa4b7dc861f03b9362< 473426a1d53a68dd1e718e6cd00d57936993fa6c affected
1def9238d4aa2146924994aa4b7dc861f03b9362< 566a931a1436d0e0ad13708ea55479b95426213c affected
1def9238d4aa2146924994aa4b7dc861f03b9362< 2415f465730e48b6e38da1c7c097317bf5dd2d20 affected
1def9238d4aa2146924994aa4b7dc861f03b9362< 27a8fabc54d2f960d47bdfbebf2bdc6e8a92a4c4 affected
1def9238d4aa2146924994aa4b7dc861f03b9362< 9b0ee571d20a238a22722126abdfde61f1b2bdd0 affected
1def9238d4aa2146924994aa4b7dc861f03b9362< ff1c3cadcf405ab37dd91418a62a7acecf3bc5e2 affected
1def9238d4aa2146924994aa4b7dc861f03b9362< 1eebe602a8d8264a12e35e39d0645fa88dbbacdd affected
… +12 more rows
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I. Basic Information for CVE-2024-49948

Vulnerability Information
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Vulnerability Title
net: add more sanity checks to qdisc_pkt_len_init()
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于net组件中对qdisc_pkt_len_init函数的更多合理性检查不足。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 1def9238d4aa2146924994aa4b7dc861f03b9362 ~ d7d1a28f5dd57b4d83def876f8d7b4403bd37df9 -
Linux Linux 3.9 -

II. Public POCs for CVE-2024-49948

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III. Intelligence Information for CVE-2024-49948

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Patches & Fixes for CVE-2024-49948 (6)

Same Patch Batch · Linux · 2024-10-21 · 372 CVEs total

CVE-2022-48985 9.8 CRITICAL net: mana: Fix race on per-CQ variable napi work_done
CVE-2024-47695 9.8 CRITICAL RDMA/rtrs-clt: Reset cid to con_num - 1 to stay in bounds
CVE-2024-50033 9.8 CRITICAL slip: make slhc_remember() more robust against malicious packets
CVE-2024-49855 9.8 CRITICAL nbd: fix race between timeout and normal completion
CVE-2024-50043 9.8 CRITICAL nfsd: fix possible badness in FREE_STATEID
CVE-2024-50047 9.8 CRITICAL smb: client: fix UAF in async decryption
CVE-2024-50046 9.8 CRITICAL NFSv4: Prevent NULL-pointer dereference in nfs42_complete_copies()
CVE-2022-49003 9.8 CRITICAL nvme: fix SRCU protection of nvme_ns_head list
CVE-2024-49996 9.4 CRITICAL cifs: Fix buffer overflow when parsing NFS reparse points
CVE-2024-47678 9.4 CRITICAL icmp: change the order of rate limits
CVE-2022-49017 8.8 HIGH tipc: re-fetch skb cb after tipc_msg_validate
CVE-2024-50029 8.8 HIGH Bluetooth: hci_conn: Fix UAF in hci_enhanced_setup_sync
CVE-2022-48954 8.8 HIGH s390/qeth: fix use-after-free in hsci
CVE-2022-48967 8.8 HIGH NFC: nci: Bounds check struct nfc_target arrays
CVE-2022-48964 8.8 HIGH ravb: Fix potential use-after-free in ravb_rx_gbeth()
CVE-2022-48960 8.8 HIGH net: hisilicon: Fix potential use-after-free in hix5hd2_rx()
CVE-2022-48962 8.8 HIGH net: hisilicon: Fix potential use-after-free in hisi_femac_rx()
CVE-2022-49015 8.8 HIGH net: hsr: Fix potential use-after-free
CVE-2024-49939 8.8 HIGH wifi: rtw89: avoid to add interface to list twice when SER
CVE-2024-49930 8.8 HIGH wifi: ath11k: fix array out-of-bound access in SoC stats

Showing top 20 of 372 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-49948

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