CVE-2026-80564 PUBLISHED

gve: fix NULL dereference due to missing ptp adjfine

Assigner: Linux
Reserved: 26.08.2026 Published: 26.08.2026 Updated: 26.08.2026

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

gve: fix NULL dereference due to missing ptp adjfine

Fix NULL dereference due to missing implementation of adjfine, which can be triggered from usermode as follows:

sudo ./testptp -d /dev/ptp0 -f 0 [ 551.943697] BUG: kernel NULL pointer dereference, address: 0000000000000000 [...] [ 552.061946] Call Trace: [ 552.064487] <TASK> [ 552.066681] ptp_clock_adjtime+0x1c0/0x2c0 [ 552.070874] ? get_clock_desc+0x6b/0xb0 [ 552.074825] pc_clock_adjtime+0x78/0xc0 [ 552.078755] __do_sys_clock_adjtime+0x85/0x110 [ 552.083293] do_syscall_64+0xea/0x610

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from acd16380523b400400523fe54c7499320e558e80 to e9482feeed66d4bc805458631013e9b61b1a9eaf (excl.)
  • affected from acd16380523b400400523fe54c7499320e558e80 to fa9b991bf678dd412dc0ed080672d34d7558d7af (excl.)
  • affected from acd16380523b400400523fe54c7499320e558e80 to 3992ced109c70b771efad9e51ae68e5c7a04dea3 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 6.17 is affected
  • unaffected from 0 to 6.17 (excl.)
  • unaffected from 6.18.46 to 6.18.* (incl.)
  • unaffected from 7.1.10 to 7.1.* (incl.)
  • unaffected from 7.2 to * (incl.)

References