CVE-2022-49870: capabilities: fix undefined behavior in bit shift for CAP_TO_MASK
Vulnerability summary
CVE-2022-49870 is a high (CVSS 7.1) Out-of-bounds Read vulnerability in linux. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 12.2% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 6 · Related 6Timeline
- 01-05-2025PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
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>
CVSS metrics
3 scores · 3 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated7.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
EPSS trend
Probability
0.22%
Chance of exploitation in the next 30 days
Percentile
12%
Versus all other CVEs
30-day change
Increase +0.01 pp
From 0.22% on 22-09-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu113 products
- linuxAll versions (No fix recorded) | < 4.15.0-206.217 | < 5.4.0-144.161 | < 5.15.0-67.74
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 4.15.0-1151.164 | < 5.4.0-1097.105 | < 5.15.0-1031.35
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ e338d263a76af78fe8f38a72131188b58fceb591, < 5b79fa628e2ab789e629a83cd211ef9b4c1a593e | ≥ e338d263a76af78fe8f38a72131188b58fceb591, < 65b0bc7a0690861812ade523d19f82688ab819dc | ≥ e338d263a76af78fe8f38a72131188b58fceb591, < dbaab08c8677d598244d21afb7818e44e1c5d826 | ≥ e338d263a76af78fe8f38a72131188b58fceb591, < 5661f111a1616ac105ec8cec81bff99b60f847ac | ≥ e338d263a76af78fe8f38a72131188b58fceb591, < fcbd2b336834bd24e1d9454ad5737856470c10d7 | ≥ e338d263a76af78fe8f38a72131188b58fceb591, < 151dc8087b5609e53b069c068e3f3ee100efa586 | ≥ e338d263a76af78fe8f38a72131188b58fceb591, < 27bdb134c043ff32c459d98f16550d0ffa0b3c34 | ≥ e338d263a76af78fe8f38a72131188b58fceb591, < 46653972e3ea64f79e7f8ae3aa41a4d3fdb70a13 | 2.6.25
- linux_kernel≥ 2.6.25, < 4.9.334 | ≥ 4.10, < 4.14.300 | ≥ 4.15, < 4.19.267 | ≥ 4.20, < 5.4.225 | ≥ 5.5, < 5.10.155 | ≥ 5.11, < 5.15.79 | ≥ 5.16, < 6.0.9 | 6.1:rc1 | 6.1:rc2 | 6.1:rc3 | 6.1:rc4
Debian1 product
- linux< 6.0.10-1
3 vendors · 116 products
