CVE-2026-74495

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Source
https://cve.org/CVERecord?id=CVE-2026-74495
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74495.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-74495
Downstream
Published
2026-08-15T12:27:23Z
Modified
2026-08-21T03:30:41Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
igbvf: Fix leak in TX DMA error cleanup
Details

In the Linux kernel, the following vulnerability has been resolved:

igbvf: Fix leak in TX DMA error cleanup

If an error is encountered while mapping TX buffers, the driver should unmap any buffers already mapped for that skb.

Because count is incremented before each frag mapping, it will always match the correct number of unmappings needed when dma_error is reached. Decrementing count before the while loop in dma_error causes an off-by-one error. If any mapping was successful before an unsuccessful mapping, exactly one DMA mapping (the head) would leak.

This bug was introduced by a 2010 fix for an endless loop in dma_error. All other affected drivers have already been fixed.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74495.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
c1fa347f20f17f14a4a1575727fa24340e8a9117
Fixed
e42b7225c45f57b42306b80cdd3bda202bae7293
Fixed
e3ed89c257f6361f13df23023cd10ace830330ad
Fixed
56726ff12cb6759ab90d6f5332c2377aeca7d249
Fixed
31089f4eab42e0fc248ec80c26f9b0bad59ba4cc
Fixed
bc25d56c03e41c10bc4b40e99ca5d7b941675c04
Fixed
845a9cdd9b03b7b6fa8de3ee80579780350a7f65
Fixed
df07003b5a6c6c9fce60d765d6a3da815a74c41c
Fixed
0565052b7e2f436b7f1541f4849da96dc0aa7a0e

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74495.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
2.6.33
Fixed
5.10.265
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.216
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.183
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.151
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.103
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.18.44
Type
ECOSYSTEM
Events
Introduced
6.19.0
Fixed
7.1.8

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74495.json"