CVE-2022-49870

capabilities: fix undefined behavior in bit shift for CAP_TO_MASK

State: Published
Severity: Not scored
Published: May 1, 2025
Updated: May 11, 2026
Reserved: May 1, 2025

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>

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	e338d263a76af78fe8f38a72131188b58fceb591 to before 5b79fa628e2ab789e629a83cd211ef9b4c1a593eAffected e338d263a76af78fe8f38a72131188b58fceb591 to before 65b0bc7a0690861812ade523d19f82688ab819dcAffected e338d263a76af78fe8f38a72131188b58fceb591 to before dbaab08c8677d598244d21afb7818e44e1c5d826Affected e338d263a76af78fe8f38a72131188b58fceb591 to before 5661f111a1616ac105ec8cec81bff99b60f847acAffected e338d263a76af78fe8f38a72131188b58fceb591 to before fcbd2b336834bd24e1d9454ad5737856470c10d7Affected e338d263a76af78fe8f38a72131188b58fceb591 to before 151dc8087b5609e53b069c068e3f3ee100efa586Affected e338d263a76af78fe8f38a72131188b58fceb591 to before 27bdb134c043ff32c459d98f16550d0ffa0b3c34Affected e338d263a76af78fe8f38a72131188b58fceb591 to before 46653972e3ea64f79e7f8ae3aa41a4d3fdb70a13Affected
LinuxLinux	2.6.25Affected before 2.6.25Not affected 4.9.334 through 4.9.Not affected 4.14.300 through 4.14.Not affected 4.19.267 through 4.19.Not affected 5.4.225 through 5.4.Not affected 5.10.155 through 5.10.Not affected 5.15.79 through 5.15.Not affected 6.0.9 through 6.0.*Not affected 6.1 and laterNot affected

Product

Versions

LinuxLinux

e338d263a76af78fe8f38a72131188b58fceb591 to before 5b79fa628e2ab789e629a83cd211ef9b4c1a593eAffected
e338d263a76af78fe8f38a72131188b58fceb591 to before 65b0bc7a0690861812ade523d19f82688ab819dcAffected
e338d263a76af78fe8f38a72131188b58fceb591 to before dbaab08c8677d598244d21afb7818e44e1c5d826Affected
e338d263a76af78fe8f38a72131188b58fceb591 to before 5661f111a1616ac105ec8cec81bff99b60f847acAffected
e338d263a76af78fe8f38a72131188b58fceb591 to before fcbd2b336834bd24e1d9454ad5737856470c10d7Affected
e338d263a76af78fe8f38a72131188b58fceb591 to before 151dc8087b5609e53b069c068e3f3ee100efa586Affected
e338d263a76af78fe8f38a72131188b58fceb591 to before 27bdb134c043ff32c459d98f16550d0ffa0b3c34Affected
e338d263a76af78fe8f38a72131188b58fceb591 to before 46653972e3ea64f79e7f8ae3aa41a4d3fdb70a13Affected

LinuxLinux

2.6.25Affected
before 2.6.25Not affected
4.9.334 through 4.9.*Not affected
4.14.300 through 4.14.*Not affected
4.19.267 through 4.19.*Not affected
5.4.225 through 5.4.*Not affected
5.10.155 through 5.10.*Not affected
5.15.79 through 5.15.*Not affected
6.0.9 through 6.0.*Not affected
6.1 and laterNot affected

References

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