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CVE

CVE-2026-74545

rtase: fix double free of multi-frag skb on DMA map failure
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CVE

CVE-2026-74545

rtase: fix double free of multi-frag skb on DMA map failure

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

rtase: fix double free of multi-frag skb on DMA map failure

In rtasestartxmit(), when the head buffer DMA mapping fails after

rtasexmitfrags() has mapped all fragments, the error path clears

the fragment descriptors with rtasetxclear_range(), which frees

the skb through the last-frag slot and accounts tx_dropped. Control

then falls through to the common error label, which frees the same

skb a second time and counts it again.

Return right after clearing the fragments when the skb owns frags;

the no-frag case still drops through and frees the head skb once.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

https://git.kernel.org/stable/c/4f09172aff5f73a5e914f4fbc0d00a1c2ea9f7cb, https://git.kernel.org/stable/c/6fb7b769d6ed6d1d2e02af4a80e57a2477f35086, https://git.kernel.org/stable/c/db986098f30881fafcc752800aa3b13fd289c922, https://git.kernel.org/stable/c/de691dc3227b061c4d0beba9f0128fe1ff33dd68, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74545.json, https://nvd.nist.gov/vuln/detail/CVE-2026-74545, https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Severity

9.8

CVSS Score
0
10

Basic Information

Base CVSS
9.8
EPSS Probability
0.00457%
EPSS Percentile
0.37836%
Introduced Version
d6e882b89fdf80be0ab4f914ec10f75215e49495,6.12.0,6.13.0,6.19.0,0
Fix Available
6fb7b769d6ed6d1d2e02af4a80e57a2477f35086,6.12.103,6.18.44,7.1.8,6.12.105-1

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