Description
In the Linux kernel, the following vulnerability has been resolved: net: mvpp2: Prevent parser TCAM memory corruption Protect the parser TCAM/SRAM memory, and the cached (shadow) SRAM information, from concurrent modifications. Both the TCAM and SRAM tables are indirectly accessed by configuring an index register that selects the row to read or write to. This means that operations must be atomic in order to, e.g., avoid spreading writes across multiple rows. Since the shadow SRAM array is used to find free rows in the hardware table, it must also be protected in order to avoid TOCTOU errors where multiple cores allocate the same row. This issue was detected in a situation where `mvpp2_set_rx_mode()` ran concurrently on two CPUs. In this particular case the MVPP2_PE_MAC_UC_PROMISCUOUS entry was corrupted, causing the classifier unit to drop all incoming unicast - indicated by the `rx_classifier_drops` counter.
Affected products
linux: linux kernel
References10
- git.kernel.org/stable/c/46c1e23e34c9d1eaadf37f88216d9d8ce0d0bcee Patch
- git.kernel.org/stable/c/5b0ae1723a7d9574ae1aee7d9cf9757a30069865 Patch
- git.kernel.org/stable/c/96844075226b49af25a69a1d084b648ec2d9b08d Patch
- git.kernel.org/stable/c/b3f48a41a00d6d8d9c6fe09ae47dd21c8c1c8b03 Patch
- git.kernel.org/stable/c/e3711163d14d02af9005e4cdad30899c565f13fb Patch
- git.kernel.org/stable/c/e64e9b6e86b39db3baa576fd73da73533b54cb2d Patch
- git.kernel.org/stable/c/fcbfb54a0269875cf3cd6a2bff4f85a2e0a0b552 Patch
- lists.debian.org/debian-lts-announce/2025/05/msg00045.html
- cert-portal.siemens.com/productcert/html/ssa-019113.html
- cert-portal.siemens.com/productcert/html/ssa-457936.html
Metrics
- CVSS 3.1
-
4.7
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 5 · as of 7 November 2026
- CWE
- CWE-367
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