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CVE-2024-49977— net: stmmac: Fix zero-division error when disabling tc cbs

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/stmmac模块在禁用tc cbs时可能导致除零错误。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.25% · P15

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 22

VendorProduct Version RangeStatus
Linux Linux b4bca4722fda928810d024350493990de39f1e40< e33fe25b1efe4f2e6a5858786dbc82ae4c44ed4c affected
2145583e5995598f50d66f8710c86bb1e910ac46< b0da9504a528f05f97d926b4db74ff21917a33e9 affected
521d42a1c24d638241220d4b9fa7e7a0ed02b88e< 5d43e1ad4567d67af2b42d3ab7c14152ffed25c6 affected
a71b686418ee6bcb6d6365f7f6d838d9874d9c64< 03582f4752427f60817d896f1a827aff772bd31e affected
b8c43360f6e424131fa81d3ba8792ad8ff25a09e< e297a2bf56d12fd7f91a0c209eb6ea84361f3368 affected
b8c43360f6e424131fa81d3ba8792ad8ff25a09e< 837d9df9c0792902710149d1a5e0991520af0f93 affected
b8c43360f6e424131fa81d3ba8792ad8ff25a09e< 675faf5a14c14a2be0b870db30a70764df81e2df affected
f01782804147a8c21f481b3342c83422c041d2c0 affected
… +14 more rows
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I. Basic Information for CVE-2024-49977

Vulnerability Information
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Vulnerability Title
net: stmmac: Fix zero-division error when disabling tc cbs
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: stmmac: Fix zero-division error when disabling tc cbs The commit b8c43360f6e4 ("net: stmmac: No need to calculate speed divider when offload is disabled") allows the "port_transmit_rate_kbps" to be set to a value of 0, which is then passed to the "div_s64" function when tc-cbs is disabled. This leads to a zero-division error. When tc-cbs is disabled, the idleslope, sendslope, and credit values the credit values are not required to be configured. Therefore, adding a return statement after setting the txQ mode to DCB when tc-cbs is disabled would prevent a zero-division error.
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/stmmac模块在禁用tc cbs时可能导致除零错误。
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 b4bca4722fda928810d024350493990de39f1e40 ~ e33fe25b1efe4f2e6a5858786dbc82ae4c44ed4c -
Linux Linux 6.10 -

II. Public POCs for CVE-2024-49977

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III. Intelligence Information for CVE-2024-49977

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Patches & Fixes for CVE-2024-49977 (1)

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

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-2024-47695 9.8 CRITICAL RDMA/rtrs-clt: Reset cid to con_num - 1 to stay in bounds
CVE-2022-48985 9.8 CRITICAL net: mana: Fix race on per-CQ variable napi work_done
CVE-2022-49003 9.8 CRITICAL nvme: fix SRCU protection of nvme_ns_head list
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-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-2022-48962 8.8 HIGH net: hisilicon: Fix potential use-after-free in hisi_femac_rx()
CVE-2024-49950 8.8 HIGH Bluetooth: L2CAP: Fix uaf in l2cap_connect
CVE-2024-49939 8.8 HIGH wifi: rtw89: avoid to add interface to list twice when SER
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-2024-50029 8.8 HIGH Bluetooth: hci_conn: Fix UAF in hci_enhanced_setup_sync
CVE-2024-49930 8.8 HIGH wifi: ath11k: fix array out-of-bound access in SoC stats
CVE-2024-50041 8.8 HIGH i40e: Fix macvlan leak by synchronizing access to mac_filter_hash
CVE-2024-49936 8.8 HIGH net/xen-netback: prevent UAF in xenvif_flush_hash()
CVE-2022-48954 8.8 HIGH s390/qeth: fix use-after-free in hsci

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-2024-49977

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