CVE-2022-49870

capabilities: fix undefined behavior in bit shift for CAP_TO_MASK

HIGH

7.1

CVSS Score

Published: May 1, 2025 at 02:10 PM UTC

Updated: June 17, 2026 at 05:19 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

HIGH7.1

Exploit prediction

EPSS 0.2%

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

2.6.25 ≤ v < 4.14.3002.6.25 ≤ v < 4.19.2672.6.25 ≤ v < 4.9.3342.6.25 ≤ v < 5.10.1552.6.25 ≤ v < 5.15.792.6.25 ≤ v < 5.4.2252.6.25 ≤ v < 6.0.92.6.25 ≤ v < 6.14.10 ≤ v < 4.14.3004.15 ≤ v < 4.19.2674.20 ≤ v < 5.4.2255.11 ≤ v < 5.15.795.16 ≤ v < 6.0.95.5 ≤ v < 5.10.1552.6.25 6.1 rc1 6.1 rc2 6.1 rc3 6.1 rc4e338d263a76af78fe8f38a72131188b58fceb591

Vendor states this is fixed in 151dc8087b5609e53b069c068e3f3ee100efa586 (fixed)

Vendor states this is fixed in 27bdb134c043ff32c459d98f16550d0ffa0b3c34 (fixed)

Vendor states this is fixed in 46653972e3ea64f79e7f8ae3aa41a4d3fdb70a13 (fixed)

Vendor states this is fixed in 5661f111a1616ac105ec8cec81bff99b60f847ac (fixed)

Vendor states this is fixed in 5b79fa628e2ab789e629a83cd211ef9b4c1a593e (fixed)

Vendor states this is fixed in 65b0bc7a0690861812ade523d19f82688ab819dc (fixed)

Vendor states this is fixed in dbaab08c8677d598244d21afb7818e44e1c5d826 (fixed)

Vendor states this is fixed in fcbd2b336834bd24e1d9454ad5737856470c10d7 (fixed)

Vendor states this is fixed in 2.6.25 (unaffected)

Vendor states this is fixed in 4.14.300 (unaffected)

Vendor states this is fixed in 4.19.267 (unaffected)

Vendor states this is fixed in 4.9.334 (unaffected)