Bug 2420260 (CVE-2023-53782) - CVE-2023-53782 kernel: dccp: Fix out of bounds access in DCCP error handler
Summary: CVE-2023-53782 kernel: dccp: Fix out of bounds access in DCCP error handler
Keywords:
Status: NEW
Alias: CVE-2023-53782
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-12-09 01:03 UTC by OSIDB Bzimport
Modified: 2026-01-06 10:18 UTC (History)
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Description OSIDB Bzimport 2025-12-09 01:03:58 UTC
In the Linux kernel, the following vulnerability has been resolved:

dccp: Fix out of bounds access in DCCP error handler

There was a previous attempt to fix an out-of-bounds access in the DCCP
error handlers, but that fix assumed that the error handlers only want
to access the first 8 bytes of the DCCP header. Actually, they also look
at the DCCP sequence number, which is stored beyond 8 bytes, so an
explicit pskb_may_pull() is required.

Comment 1 Avinash Hanwate 2025-12-17 09:24:47 UTC
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025120939-CVE-2023-53782-6428@gregkh/T


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