CVE-2025-21789
published 2025-02-27CVE-2025-21789: In the Linux kernel, the following vulnerability has been resolved: LoongArch: csum: Fix OoB access in IP checksum code for negative lengths Commit…
PriorityP430high7.1CVSS 3.1
AVLACLPRLUINSUCHINAH
EPSS
0.23%
13.4th percentile
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.
Affected
15 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.12.16-1 (forky) | linux 6.12.16-1 (forky) |
| linux | linux | — | — |
| linux | linux | >= 69e3a6aa6be21de6aaf38130fad97ecde34a193c < 964a8895704a22efc06a2a3276b624a5ae985a06 | 964a8895704a22efc06a2a3276b624a5ae985a06 |
| linux | linux | >= 69e3a6aa6be21de6aaf38130fad97ecde34a193c < 9f15a8df542c0f08732a67d1a14ee7c22948fb97 | 9f15a8df542c0f08732a67d1a14ee7c22948fb97 |
| linux | linux | >= 69e3a6aa6be21de6aaf38130fad97ecde34a193c < d6508ffff32b44b6d0de06704034e4eef1c307a7 | d6508ffff32b44b6d0de06704034e4eef1c307a7 |
| linux | linux | >= 69e3a6aa6be21de6aaf38130fad97ecde34a193c < 6287f1a8c16138c2ec750953e35039634018c84a | 6287f1a8c16138c2ec750953e35039634018c84a |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 6.12.16-1 | 6.12.16-1 |
| linux | linux_kernel | >= 0 < 6.12.16-1 | 6.12.16-1 |
| linux | linux_kernel | >= 6.13 < 6.13.4 | 6.13.4 |
| linux | linux_kernel | >= 6.4 < 6.6.79 | 6.6.79 |
| linux | linux_kernel | >= 6.7 < 6.12.16 | 6.12.16 |
| msrc | azl3_kernel_6.6.78.1-3_on_azure_linux_3.0 | — | — |
| msrc | azl3_kernel_6.6.79.1-1_on_azure_linux_3.0 | — | — |
CVSS provenance
nvdv3.17.1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
osv7.1HIGH
vendor_debian7.1LOW
vendor_msrc7.1HIGH
vendor_redhat7.1HIGH
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
Red Hat
kernel: LoongArch: csum: Fix OoB access in IP checksum code for negative lengths
vendor_redhat·2025-02-27·CVSS 7.1
CVE-2025-21789 [HIGH] CWE-125 kernel: LoongArch: csum: Fix OoB access in IP checksum code for negative lengths
kernel: LoongArch: csum: Fix OoB access in IP checksum code for negative lengths
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.
Package: kernel (Red Hat Enterprise Linux 10) - Not affected
Package: kernel (Red Hat Enterprise Linux 6) - Not affected
Package: kernel (Red Hat Enterprise Linux 7) - Not affected
Package: kernel-rt (Red Hat Enterprise Linux 7) - Not affected
Package: kernel (Red Hat Enterprise Linux 8) - Not affected
Packag
Microsoft
LoongArch: csum: Fix OoB access in IP checksum code for negative lengths
vendor_msrc·2025-02-11·CVSS 7.1
CVE-2025-21789 [HIGH] CWE-125 LoongArch: csum: Fix OoB access in IP checksum code for negative lengths
LoongArch: csum: Fix OoB access in IP checksum code for negative lengths
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
Linux: Linux
Customer Action Required: Yes
Remediation: CBL-Mariner Releases
Referen
Debian
CVE-2025-21789: linux - In the Linux kernel, the following vulnerability has been resolved: LoongArch: ...
vendor_debian·2025·CVSS 7.1
CVE-2025-21789 [HIGH] CVE-2025-21789: linux - In the Linux kernel, the following vulnerability has been resolved: LoongArch: ...
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.
Scope: local
bookworm: resolved
bullseye: resolved
forky: resolved (fixed in 6.12.16-1)
sid: resolved (fixed in 6.12.16-1)
trixie: resolved (fixed in 6.12.16-1)
GHSA
GHSA-fm6p-4m7g-f8f3: In the Linux kernel, the following vulnerability has been resolved:
LoongArch: csum: Fix OoB access in IP checksum code for negative lengths
Commit
ghsa_unreviewed·2025-02-27
CVE-2025-21789 [HIGH] CWE-125 GHSA-fm6p-4m7g-f8f3: In the Linux kernel, the following vulnerability has been resolved:
LoongArch: csum: Fix OoB access in IP checksum code for negative lengths
Commit
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.
OSV
CVE-2025-21789: In the Linux kernel, the following vulnerability has been resolved: LoongArch: csum: Fix OoB access in IP checksum code for negative lengths Commit 69
osv·2025-02-27·CVSS 7.1
CVE-2025-21789 [HIGH] CVE-2025-21789: In the Linux kernel, the following vulnerability has been resolved: LoongArch: csum: Fix OoB access in IP checksum code for negative lengths Commit 69
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.
No detection rules found.
No public exploits indexed.
2025-02-27
Published