ibmvnic: Add tx check to prevent skb leak (Linux Linux)

CVE-2024-41066
HIGH 7.5

At a glance

Source
NVD
EPSS
EPSS 0.53 % · percentile 45 ()
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: ibmvnic: Add tx check to prevent skb leak Below is a summary of how the driver stores a reference to an skb during transmit: tx_buff[free_map[consumer_index]]->skb = new_skb; free_map[consumer_index] = IBMVNIC_INVALID_MAP; consumer_index ++; Where variable data looks like this: free_map == [4, IBMVNIC_INVALID_MAP, IBMVNIC_INVALID_MAP, 0, 3] consumer_index^ tx_buff == [skb=null, skb=<ptr>, skb=<ptr>, skb=null, skb=null] The driver has checks to ensure that free_map[consumer_index] pointed to a valid index but there was no check to ensure that this index pointed to an unused/null skb address. So, if, by some chance, our free_map and tx_buff lists become out of sync then we were previously risking an skb memory leak. This could then cause tcp congestion control to stop sending packets, eventually leading to ETIMEDOUT. Therefore, add a conditional to ensure that the skb address is null. If not then warn the user (because this is still a bug that should be patched) and free the old pointer to prevent memleak/tcp problems.

Weaknesses (CWE)

  • CWE-401 — Missing Release of Memory after Effective Lifetime

References

Scores

VersionScoreVectorScored by
CVSS 3.1HIGH 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HLinux
CVSS 3.1HIGH 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)
CVSS 3.1MEDIUM 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HNVD · nvd@nist.gov (Primary)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Linux · Linuxaffected 65d6470d139a6c1655fccb5cbacbeaba8e8ad2f8 < 16ad1557cae582e79bb82dddd612d9bdfaa11d4c ; affected 65d6470d139a6c1655fccb5cbacbeaba8e8ad2f8 < 267c61c4afed0ff9a2e83462abad3f41d8ca1f06 ; affected 65d6470d139a6c1655fccb5cbacbeaba8e8ad2f8 < e7b75def33eae61ddaad6cb616c517dc3882eb2a ; affected 65d6470d139a6c1655fccb5cbacbeaba8e8ad2f8 < 0983d288caf984de0202c66641577b739caad561 ; affected 1a64564eee05128f773930649edfdd50cbe80656 ; affected 5142c39253385702a4de8f897027e1d76fc333de
Linux · Linuxaffected 5.14 ; unaffected 0 < 5.14 ; unaffected 6.1.101 ≤ 6.1.* ; unaffected 6.6.42 ≤ 6.6.* ; unaffected 6.9.11 ≤ 6.9.* ; unaffected 6.10 ≤ *

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD