Description
In the Linux kernel, the following vulnerability has been resolved: capabilities: fix undefined behavior in bit shift for CAP_TO_MASK Shifting signed 32-bit value by 31 bits is undefined, so changing significant bit to unsigned. The UBSAN warning calltrace like below: UBSAN: shift-out-of-bounds in security/commoncap.c:1252:2 left shift of 1 by 31 places cannot be represented in type 'int' Call Trace: <TASK> dump_stack_lvl+0x7d/0xa5 dump_stack+0x15/0x1b ubsan_epilogue+0xe/0x4e __ubsan_handle_shift_out_of_bounds+0x1e7/0x20c cap_task_prctl+0x561/0x6f0 security_task_prctl+0x5a/0xb0 __x64_sys_prctl+0x61/0x8f0 do_syscall_64+0x58/0x80 entry_SYSCALL_64_after_hwframe+0x63/0xcd </TASK>
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
e338d263a76af78fe8f38a72131188b58fceb591 to < 5b79fa628e2ab789e629a83cd211ef9b4c1a593eaffectede338d263a76af78fe8f38a72131188b58fceb591 to < 65b0bc7a0690861812ade523d19f82688ab819dcaffectede338d263a76af78fe8f38a72131188b58fceb591 to < dbaab08c8677d598244d21afb7818e44e1c5d826affectede338d263a76af78fe8f38a72131188b58fceb591 to < 5661f111a1616ac105ec8cec81bff99b60f847acaffectede338d263a76af78fe8f38a72131188b58fceb591 to < fcbd2b336834bd24e1d9454ad5737856470c10d7affectede338d263a76af78fe8f38a72131188b58fceb591 to < 151dc8087b5609e53b069c068e3f3ee100efa586affectede338d263a76af78fe8f38a72131188b58fceb591 to < 27bdb134c043ff32c459d98f16550d0ffa0b3c34affectede338d263a76af78fe8f38a72131188b58fceb591 to < 46653972e3ea64f79e7f8ae3aa41a4d3fdb70a13affected
Linux Linux
Default version status: affected
2.6.25affected0 to < 2.6.25unaffected4.9.334 to ≤ 4.9.*unaffected4.14.300 to ≤ 4.14.*unaffected4.19.267 to ≤ 4.19.*unaffected5.4.225 to ≤ 5.4.*unaffected5.10.155 to ≤ 5.10.*unaffected5.15.79 to ≤ 5.15.*unaffected6.0.9 to ≤ 6.0.*unaffected6.1 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/5b79fa628e2ab789e629a83cd211ef9b4c1a593e ↗
- https://git.kernel.org/stable/c/65b0bc7a0690861812ade523d19f82688ab819dc ↗
- https://git.kernel.org/stable/c/dbaab08c8677d598244d21afb7818e44e1c5d826 ↗
- https://git.kernel.org/stable/c/5661f111a1616ac105ec8cec81bff99b60f847ac ↗
- https://git.kernel.org/stable/c/fcbd2b336834bd24e1d9454ad5737856470c10d7 ↗
- https://git.kernel.org/stable/c/151dc8087b5609e53b069c068e3f3ee100efa586 ↗
- https://git.kernel.org/stable/c/27bdb134c043ff32c459d98f16550d0ffa0b3c34 ↗
- https://git.kernel.org/stable/c/46653972e3ea64f79e7f8ae3aa41a4d3fdb70a13 ↗