CVE-2022-49870
capabilities: fix undefined behavior in bit shift for CAP_TO_MASK
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>
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Linux Linux |
≥ e338d263a76af78fe8f38a72131188b58fceb591; < 5b79fa628e2ab789e629a83cd211ef9b4c1a593e (affected, git) ≥ e338d263a76af78fe8f38a72131188b58fceb591; < 65b0bc7a0690861812ade523d19f82688ab819dc (affected, git) ≥ e338d263a76af78fe8f38a72131188b58fceb591; < dbaab08c8677d598244d21afb7818e44e1c5d826 (affected, git) ≥ e338d263a76af78fe8f38a72131188b58fceb591; < 5661f111a1616ac105ec8cec81bff99b60f847ac (affected, git) ≥ e338d263a76af78fe8f38a72131188b58fceb591; < fcbd2b336834bd24e1d9454ad5737856470c10d7 (affected, git) ≥ e338d263a76af78fe8f38a72131188b58fceb591; < 151dc8087b5609e53b069c068e3f3ee100efa586 (affected, git) ≥ e338d263a76af78fe8f38a72131188b58fceb591; < 27bdb134c043ff32c459d98f16550d0ffa0b3c34 (affected, git) ≥ e338d263a76af78fe8f38a72131188b58fceb591; < 46653972e3ea64f79e7f8ae3aa41a4d3fdb70a13 (affected, git) Other versions: unaffected |
CNA: Linux |
| Linux Linux |
2.6.25 (affected) ≥ 0; < 2.6.25 (unaffected, semver) ≥ 4.9.334; ≤ 4.9.* (unaffected, semver) ≥ 4.14.300; ≤ 4.14.* (unaffected, semver) ≥ 4.19.267; ≤ 4.19.* (unaffected, semver) ≥ 5.4.225; ≤ 5.4.* (unaffected, semver) ≥ 5.10.155; ≤ 5.10.* (unaffected, semver) ≥ 5.15.79; ≤ 5.15.* (unaffected, semver) ≥ 6.0.9; ≤ 6.0.* (unaffected, semver) ≥ 6.1; ≤ * (unaffected, original_commit_for_fix) Other versions: affected |
CNA: Linux |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
No CVSS assessment reported. An unscored record is not a low-severity determination.
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://git.kernel.org/stable/c/5b79fa628e2ab789e629a83cd211ef9b4c1a593eCNA: Linux
- https://git.kernel.org/stable/c/65b0bc7a0690861812ade523d19f82688ab819dcCNA: Linux
- https://git.kernel.org/stable/c/dbaab08c8677d598244d21afb7818e44e1c5d826CNA: Linux
- https://git.kernel.org/stable/c/5661f111a1616ac105ec8cec81bff99b60f847acCNA: Linux
- https://git.kernel.org/stable/c/fcbd2b336834bd24e1d9454ad5737856470c10d7CNA: Linux
- https://git.kernel.org/stable/c/151dc8087b5609e53b069c068e3f3ee100efa586CNA: Linux
- https://git.kernel.org/stable/c/27bdb134c043ff32c459d98f16550d0ffa0b3c34CNA: Linux
- https://git.kernel.org/stable/c/46653972e3ea64f79e7f8ae3aa41a4d3fdb70a13CNA: Linux
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