Bug 2348534 (CVE-2025-21789) - CVE-2025-21789 kernel: LoongArch: csum: Fix OoB access in IP checksum code for negative lengths
Summary: CVE-2025-21789 kernel: LoongArch: csum: Fix OoB access in IP checksum code fo...
Keywords:
Status: NEW
Alias: CVE-2025-21789
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-02-27 03:02 UTC by OSIDB Bzimport
Modified: 2025-03-16 12:09 UTC (History)
4 users (show)

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Description OSIDB Bzimport 2025-02-27 03:02:20 UTC 
In the Linux kernel, the following vulnerability has been resolved:

LoongArch: csum: Fix OoB access in IP checksum code for negative lengths

Commit 69e3a6aa6be2 ("LoongArch: Add checksum optimization for 64-bit
system") would cause an undefined shift and an out-of-bounds read.

Commit 8bd795fedb84 ("arm64: csum: Fix OoB access in IP checksum code
for negative lengths") fixes the same issue on ARM64.
Comment 1 Michal Findra 2025-02-27 16:05:49 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022609-CVE-2025-21789-9691@gregkh/T
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