Read the docs
TI-2022-24904 Aliases CVE-2022-49395GHSA-pxwr-cc58-gq3m

um: Fix out-of-bounds read in LDT setup

Priority LOW 31CWE-125Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · High
Fix status
Partial Red Hat: 25 fixed, 2 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.

Summary

In the Linux kernel, the following vulnerability has been resolved: um: Fix out-of-bounds read in LDT setup syscall_stub_data() expects the data_count parameter to be the number of longs, not bytes. ================================================================== BUG: KASAN: stack-out-of-bounds in syscall_stub_data+0x70/0xe0 Read of size 128 at addr 000000006411f6f0 by task swapper/1 CPU: 0 PID: 1 Comm: swapper Not tainted 5.18.0+ #18 Call Trace: show_stack.cold+0x166/0x2a7 __dump_stack+0x3a/0x43 dump_stack_lvl+0x1f/0x27 print_report.cold+0xdb/0xf81 kasan_report+0x119/0x1f0 kasan_check_range+0x3a3/0x440 memcpy+0x52/0x140 syscall_stub_data+0x70/0xe0 write_ldt_entry+0xac/0x190 init_new_ldt+0x515/0x960 init_new_context+0x2c4/0x4d0 mm_init.constprop.0+0x5ed/0x760 mm_alloc+0x118/0x170 0x60033f48 do_one_initcall+0x1d7/0x860 0x60003e7b kernel_init+0x6e/0x3d4 new_thread_handler+0x1e7/0x2c0 The buggy address belongs to stack of task swapper/1 and is located at offset 64 in frame: init_new_ldt+0x0/0x960 This frame has 2 objects: [32, 40) 'addr' [64, 80) 'desc' ==================================================================

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00288 21st percentileScored 2026-11-07
Fix Partial Linux (Linux): 4.9.318, 4.14.283, 4.19.247 +6Red Hat: 11 advisoriesRed Hat: 25 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux2.6.15 and later4.9.318, 4.14.283, 4.19.247, 5.4.198, 5.10.121, 5.15.46, 5.17.14, 5.18.3, 5.19Patch availableCNA
  • Linux VendorLinux Affected 2.6.15 and later Fixed in 4.9.318, 4.14.283, 4.19.247, 5.4.198, 5.10.121, 5.15.46, 5.17.14, 5.18.3, 5.19 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*2.6.15 to before 4.9.318; 4.10 to before 4.14.283; 4.15 to before 4.19.247; 4.20 to before 5.4.198; 5.5 to before 5.10.121; 5.11 to before 5.15.46; 5.16 to before 5.17.14; 5.18 to before 5.18.3VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 2.6.15 to before 4.9.318; 4.10 to before 4.14.283; 4.15 to before 4.19.247; 4.20 to before 5.4.198; 5.5 to before 5.10.121; 5.11 to before 5.15.46; 5.16 to before 5.17.14; 5.18 to before 5.18.3 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 4.9.318, 4.14.283, 4.19.247, 5.4.198, 5.10.121, 5.15.46, 5.17.14, 5.18.3, 5.19

Red Hat 11 advisories

  • RHSA-2025:13135 Released 2025-08-06 · Red Hat rating Important
    kernel security update
    • Red Hat CodeReady Linux Builder EUS (v.9.4) kernel-tools-libs-devel-5.14.0-427.81.1.el9_4, libperf-5.14.0-427.81.1.el9_4
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) kernel-64k-debug-devel-5.14.0-427.81.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.81.1.el9_4, kernel-64k-devel-5.14.0-427.81.1.el9_4 +11
    • Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool-7.3.0-427.81.1.el9_4, kernel-5.14.0-427.81.1.el9_4, kernel-64k-5.14.0-427.81.1.el9_4 +29
    • Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt-5.14.0-427.81.1.el9_4, kernel-rt-core-5.14.0-427.81.1.el9_4, kernel-rt-debug-5.14.0-427.81.1.el9_4 +9
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4) kernel-rt-5.14.0-427.81.1.el9_4, kernel-rt-core-5.14.0-427.81.1.el9_4, kernel-rt-debug-5.14.0-427.81.1.el9_4 +11
  • RHSA-2025:11570 Released 2025-07-23 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.6) bpftool-4.18.0-372.153.1.el8_6, kernel-4.18.0-372.153.1.el8_6, kernel-abi-stablelists-4.18.0-372.153.1.el8_6 +14
    • Red Hat Enterprise Linux BaseOS E4S (v.8.6) bpftool-4.18.0-372.153.1.el8_6, kernel-4.18.0-372.153.1.el8_6, kernel-abi-stablelists-4.18.0-372.153.1.el8_6 +19
    • Red Hat Enterprise Linux BaseOS TUS (v.8.6) bpftool-4.18.0-372.153.1.el8_6, kernel-4.18.0-372.153.1.el8_6, kernel-abi-stablelists-4.18.0-372.153.1.el8_6 +14
  • RHSA-2025:11045 Released 2025-07-15 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) kernel-64k-debug-devel-5.14.0-284.125.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.125.1.el9_2, kernel-64k-devel-5.14.0-284.125.1.el9_2 +10
    • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool-7.0.0-284.125.1.el9_2, kernel-5.14.0-284.125.1.el9_2, kernel-64k-5.14.0-284.125.1.el9_2 +29
Show 8 more Red Hat advisories
  • RHSA-2025:10830 Released 2025-07-14 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.0) kernel-debug-devel-5.14.0-70.138.1.el9_0, kernel-debug-devel-matched-5.14.0-70.138.1.el9_0, kernel-devel-5.14.0-70.138.1.el9_0 +5
    • Red Hat Enterprise Linux BaseOS E4S (v.9.0) bpftool-5.14.0-70.138.1.el9_0, kernel-5.14.0-70.138.1.el9_0, kernel-abi-stablelists-5.14.0-70.138.1.el9_0 +14
  • RHSA-2025:10828 Released 2025-07-14 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.4) bpftool-4.18.0-305.162.1.el8_4, kernel-4.18.0-305.162.1.el8_4, kernel-abi-stablelists-4.18.0-305.162.1.el8_4 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) bpftool-4.18.0-305.162.1.el8_4, kernel-4.18.0-305.162.1.el8_4, kernel-abi-stablelists-4.18.0-305.162.1.el8_4 +14
  • RHSA-2025:10829 Released 2025-07-14 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux NFV E4S (v.9.0) kernel-rt-5.14.0-70.138.1.rt21.210.el9_0, kernel-rt-core-5.14.0-70.138.1.rt21.210.el9_0, kernel-rt-debug-5.14.0-70.138.1.rt21.210.el9_0 +9
    • Red Hat Enterprise Linux Real Time E4S (v.9.0) kernel-rt-5.14.0-70.138.1.rt21.210.el9_0, kernel-rt-core-5.14.0-70.138.1.rt21.210.el9_0, kernel-rt-debug-5.14.0-70.138.1.rt21.210.el9_0 +7
  • RHSA-2025:10527 Released 2025-07-07 · Red Hat rating Moderate
    kernel-rt security update
    • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt-5.14.0-284.125.1.rt14.410.el9_2, kernel-rt-core-5.14.0-284.125.1.rt14.410.el9_2, kernel-rt-debug-5.14.0-284.125.1.rt14.410.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt-5.14.0-284.125.1.rt14.410.el9_2, kernel-rt-core-5.14.0-284.125.1.rt14.410.el9_2, kernel-rt-debug-5.14.0-284.125.1.rt14.410.el9_2 +11
  • RHSA-2025:10211 Released 2025-07-02 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux BaseOS E4S (v.8.8) bpftool-4.18.0-477.100.1.el8_8, kernel-4.18.0-477.100.1.el8_8, kernel-abi-stablelists-4.18.0-477.100.1.el8_8 +14
    • Red Hat Enterprise Linux BaseOS TUS (v.8.8) bpftool-4.18.0-477.100.1.el8_8, kernel-4.18.0-477.100.1.el8_8, kernel-abi-stablelists-4.18.0-477.100.1.el8_8 +14
  • RHSA-2025:10179 Released 2025-07-02 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) bpftool-4.18.0-193.156.1.el8_2, kernel-4.18.0-193.156.1.el8_2, kernel-abi-whitelists-4.18.0-193.156.1.el8_2 +14
  • RHSA-2025:8743 Released 2025-06-10 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.56.1.el8_10, kernel-4.18.0-553.56.1.el8_10, kernel-abi-stablelists-4.18.0-553.56.1.el8_10 +19
    • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.56.1.el8_10
  • RHSA-2025:8744 Released 2025-06-10 · Red Hat rating Moderate
    kernel-rt security update
    • Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.56.1.rt7.397.el8_10, kernel-rt-core-4.18.0-553.56.1.rt7.397.el8_10, kernel-rt-debug-4.18.0-553.56.1.rt7.397.el8_10 +9
    • Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.56.1.rt7.397.el8_10, kernel-rt-core-4.18.0-553.56.1.rt7.397.el8_10, kernel-rt-debug-4.18.0-553.56.1.rt7.397.el8_10 +7

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat CodeReady Linux Builder EUS (v.9.4)Fixed RHSA-2025:13135
Red Hat Enterprise Linux AppStream E4S (v.9.0)Fixed RHSA-2025:10830
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2025:11045
Red Hat Enterprise Linux AppStream EUS (v.9.4)Fixed RHSA-2025:13135
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2025:8743
Red Hat Enterprise Linux BaseOS AUS (v. 8.2)Fixed RHSA-2025:10179
Red Hat Enterprise Linux BaseOS AUS (v.8.4)Fixed RHSA-2025:10828
Red Hat Enterprise Linux BaseOS AUS (v.8.6)Fixed RHSA-2025:11570
Red Hat Enterprise Linux BaseOS E4S (v.8.6)Fixed RHSA-2025:11570
Red Hat Enterprise Linux BaseOS E4S (v.8.8)Fixed RHSA-2025:10211
Red Hat Enterprise Linux BaseOS E4S (v.9.0)Fixed RHSA-2025:10830
Red Hat Enterprise Linux BaseOS E4S (v.9.2)Fixed RHSA-2025:11045
Red Hat Enterprise Linux BaseOS EUS (v.9.4)Fixed RHSA-2025:13135
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)Fixed RHSA-2025:10828
Red Hat Enterprise Linux BaseOS TUS (v.8.6)Fixed RHSA-2025:11570
Red Hat Enterprise Linux BaseOS TUS (v.8.8)Fixed RHSA-2025:10211
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2025:8743
Red Hat Enterprise Linux NFV (v. 8)Fixed RHSA-2025:8744
Red Hat Enterprise Linux NFV E4S (v.9.0)Fixed RHSA-2025:10829
Red Hat Enterprise Linux RT (v. 8)Fixed RHSA-2025:8744
Red Hat Enterprise Linux Real Time E4S (v.9.0)Fixed RHSA-2025:10829
Red Hat Enterprise Linux Real Time E4S (v.9.2)Fixed RHSA-2025:10527
Red Hat Enterprise Linux Real Time EUS (v.9.4)Fixed RHSA-2025:13135
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)Fixed RHSA-2025:10527
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4)Fixed RHSA-2025:13135
Not affected: 2 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 6

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-49395
  2. 2026-10-03 Alias added: GHSA-pxwr-cc58-gq3m

References

Patch 9

  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
  • TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
  • TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
  • TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
  • TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
See all 15278 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences