CVE-2023-53654 PUBLISHED

octeontx2-af: Add validation before accessing cgx and lmac

Assigner: Linux
Reserved: 07.10.2025 Published: 07.10.2025 Updated: 07.10.2025

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

octeontx2-af: Add validation before accessing cgx and lmac

with the addition of new MAC blocks like CN10K RPM and CN10KB RPM_USX, LMACs are noncontiguous and CGX blocks are also noncontiguous. But during RVU driver initialization, the driver is assuming they are contiguous and trying to access cgx or lmac with their id which is resulting in kernel panic.

This patch fixes the issue by adding proper checks.

[ 23.219150] pc : cgx_lmac_read+0x38/0x70 [ 23.219154] lr : rvu_program_channels+0x3f0/0x498 [ 23.223852] sp : ffff000100d6fc80 [ 23.227158] x29: ffff000100d6fc80 x28: ffff00010009f880 x27: 000000000000005a [ 23.234288] x26: ffff000102586768 x25: 0000000000002500 x24: fffffffffff0f000

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 91c6945ea1f9059fea886630d0fd8070740e2aaf to e425e2ba933618ee5ec8e4f3eb341efeb6c9ddef (excl.)
  • affected from 91c6945ea1f9059fea886630d0fd8070740e2aaf to a5485a943193e55c79150382e6461e8ea759e96e (excl.)
  • affected from 91c6945ea1f9059fea886630d0fd8070740e2aaf to b04872e15f3df62cb2fd530950f769626e1ef489 (excl.)
  • affected from 91c6945ea1f9059fea886630d0fd8070740e2aaf to 79ebb53772c95d3a6ae51b3c65f9985fdd430df6 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 5.12 is affected
  • unaffected from 0 to 5.12 (excl.)
  • unaffected from 5.15.121 to 5.15.* (incl.)
  • unaffected from 6.1.39 to 6.1.* (incl.)
  • unaffected from 6.4.4 to 6.4.* (incl.)
  • unaffected from 6.5 to * (incl.)

References