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TI-2019-14244 Aliases CVE-2019-19768GHSA-j7c5-8q8x-hgwf

In the Linux kernel 5.4.0-rc2, there is a use-after-free (read) in the __blk_add_trace…

Priority MEDIUM 40CWE-416Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 43 fixed, 2 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.

Summary

In the Linux kernel 5.4.0-rc2, there is a use-after-free (read) in the __blk_add_trace function in kernel/trace/blktrace.c (which is used to fill out a blk_io_trace structure and place it in a per-cpu sub-buffer).

Why it matters now

EPSS 0.0415 90th percentileScored 2026-11-07
Fix Partial Red Hat: 16 advisoriesRed Hat: 43 fixed, 2 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:5.4.0:*:*:*:*:*:*:*5.4.0VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.4.0:rc1:*:*:*:*:*:*5.4.0 rc1VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.4.0:rc2:*:*:*:*:*:*5.4.0 rc2VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:5.4.0:*:*:*:*:*:*:* Versions 5.4.0 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.4.0:rc1:*:*:*:*:*:* Versions 5.4.0 rc1 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.4.0:rc2:*:*:*:*:*:* Versions 5.4.0 rc2 Vulnerable ·Linux

Remediation

Red Hat 16 advisories

  • RHSA-2020:2519 Released 2020-06-12 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux Server EUS (v. 7.7) kpatch-patch-3_10_0-1062-1-18.el7, kpatch-patch-3_10_0-1062_12_1-1-2.el7, kpatch-patch-3_10_0-1062_18_1-1-2.el7 +8
  • RHSA-2020:2522 Released 2020-06-11 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux ComputeNode EUS (v. 7.7) bpftool-3.10.0-1062.26.1.el7, kernel-3.10.0-1062.26.1.el7, kernel-abi-whitelists-3.10.0-1062.26.1.el7 +8
    • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7) kernel-tools-libs-devel-3.10.0-1062.26.1.el7
    • Red Hat Enterprise Linux Server EUS (v. 7.7) bpftool-3.10.0-1062.26.1.el7, kernel-3.10.0-1062.26.1.el7, kernel-abi-whitelists-3.10.0-1062.26.1.el7 +11
    • Red Hat Enterprise Linux Server Optional EUS (v. 7.7) kernel-debug-devel-3.10.0-1062.26.1.el7, kernel-tools-libs-devel-3.10.0-1062.26.1.el7
  • RHSA-2020:2289 Released 2020-05-26 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux ComputeNode EUS (v. 7.6) bpftool-3.10.0-957.54.1.el7, kernel-3.10.0-957.54.1.el7, kernel-abi-whitelists-3.10.0-957.54.1.el7 +8
    • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) kernel-tools-libs-devel-3.10.0-957.54.1.el7
    • Red Hat Enterprise Linux Server EUS (v. 7.6) bpftool-3.10.0-957.54.1.el7, kernel-3.10.0-957.54.1.el7, kernel-abi-whitelists-3.10.0-957.54.1.el7 +11
    • Red Hat Enterprise Linux Server Optional EUS (v. 7.6) kernel-debug-devel-3.10.0-957.54.1.el7, kernel-tools-libs-devel-3.10.0-957.54.1.el7
    • Red Hat Virtualization 4.2 Hypervisor for RHEL 7.6 EUS kernel-devel-3.10.0-957.54.1.el7, perf-3.10.0-957.54.1.el7, python-perf-3.10.0-957.54.1.el7
Show 13 more Red Hat advisories
  • RHSA-2020:2285 Released 2020-05-26 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux Server AUS (v. 7.2) kernel-3.10.0-327.88.1.el7, kernel-abi-whitelists-3.10.0-327.88.1.el7, kernel-debug-3.10.0-327.88.1.el7 +7
    • Red Hat Enterprise Linux Server Optional AUS (v. 7.2) kernel-tools-libs-devel-3.10.0-327.88.1.el7
  • RHSA-2020:2277 Released 2020-05-26 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux Server AUS (v. 7.3) kernel-3.10.0-514.76.1.el7, kernel-abi-whitelists-3.10.0-514.76.1.el7, kernel-debug-3.10.0-514.76.1.el7 +7
    • Red Hat Enterprise Linux Server E4S (v. 7.3) kernel-3.10.0-514.76.1.el7, kernel-abi-whitelists-3.10.0-514.76.1.el7, kernel-bootwrapper-3.10.0-514.76.1.el7 +8
    • Red Hat Enterprise Linux Server Optional AUS (v. 7.3) kernel-tools-libs-devel-3.10.0-514.76.1.el7
    • Red Hat Enterprise Linux Server Optional E4S (v. 7.3) kernel-debug-devel-3.10.0-514.76.1.el7, kernel-tools-libs-devel-3.10.0-514.76.1.el7
    • Red Hat Enterprise Linux Server Optional TUS (v. 7.3) kernel-tools-libs-devel-3.10.0-514.76.1.el7
    • Red Hat Enterprise Linux Server TUS (v. 7.3) kernel-3.10.0-514.76.1.el7, kernel-abi-whitelists-3.10.0-514.76.1.el7, kernel-debug-3.10.0-514.76.1.el7 +7
  • RHSA-2020:2291 Released 2020-05-26 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux Server EUS (v. 7.6) kpatch-patch-3_10_0-957_35_1-1-9.el7, kpatch-patch-3_10_0-957_35_2-1-8.el7, kpatch-patch-3_10_0-957_38_1-1-7.el7 +6
  • RHSA-2020:2242 Released 2020-05-20 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt-1:3.10.0-693.67.1.rt56.665.el6rt, kernel-rt-debug-1:3.10.0-693.67.1.rt56.665.el6rt, kernel-rt-debug-devel-1:3.10.0-693.67.1.rt56.665.el6rt +7
  • RHSA-2020:2203 Released 2020-05-20 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.1) kpatch-patch-4_18_0-147-1-13.el8, kpatch-patch-4_18_0-147_0_2-1-9.el8, kpatch-patch-4_18_0-147_0_3-1-9.el8 +3
  • RHSA-2020:2199 Released 2020-05-19 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder EUS (v. 8.1) kernel-tools-libs-devel-4.18.0-147.13.2.el8_1
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.1) bpftool-4.18.0-147.13.2.el8_1, kernel-4.18.0-147.13.2.el8_1, kernel-abi-whitelists-4.18.0-147.13.2.el8_1 +19
  • RHSA-2020:2214 Released 2020-05-19 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux Server AUS (v. 7.4) kernel-3.10.0-693.67.1.el7, kernel-abi-whitelists-3.10.0-693.67.1.el7, kernel-debug-3.10.0-693.67.1.el7 +7
    • Red Hat Enterprise Linux Server E4S (v. 7.4) kernel-3.10.0-693.67.1.el7, kernel-abi-whitelists-3.10.0-693.67.1.el7, kernel-bootwrapper-3.10.0-693.67.1.el7 +8
    • Red Hat Enterprise Linux Server Optional AUS (v. 7.4) kernel-tools-libs-devel-3.10.0-693.67.1.el7
    • Red Hat Enterprise Linux Server Optional E4S (v. 7.4) kernel-debug-devel-3.10.0-693.67.1.el7, kernel-tools-libs-devel-3.10.0-693.67.1.el7
    • Red Hat Enterprise Linux Server Optional TUS (v. 7.4) kernel-tools-libs-devel-3.10.0-693.67.1.el7
    • Red Hat Enterprise Linux Server TUS (v. 7.4) kernel-3.10.0-693.67.1.el7, kernel-abi-whitelists-3.10.0-693.67.1.el7, kernel-debug-3.10.0-693.67.1.el7 +7
  • RHSA-2020:2082 Released 2020-05-12 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux Client (v. 7) bpftool-3.10.0-1127.8.2.el7, kernel-3.10.0-1127.8.2.el7, kernel-abi-whitelists-3.10.0-1127.8.2.el7 +8
    • Red Hat Enterprise Linux Client Optional (v. 7) kernel-tools-libs-devel-3.10.0-1127.8.2.el7
    • Red Hat Enterprise Linux ComputeNode (v. 7) bpftool-3.10.0-1127.8.2.el7, kernel-3.10.0-1127.8.2.el7, kernel-abi-whitelists-3.10.0-1127.8.2.el7 +8
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-tools-libs-devel-3.10.0-1127.8.2.el7
    • Red Hat Enterprise Linux Server (v. 7) bpftool-3.10.0-1127.8.2.el7, kernel-3.10.0-1127.8.2.el7, kernel-abi-whitelists-3.10.0-1127.8.2.el7 +11
    • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debug-devel-3.10.0-1127.8.2.el7, kernel-tools-libs-devel-3.10.0-1127.8.2.el7
    • Red Hat Enterprise Linux Workstation (v. 7) bpftool-3.10.0-1127.8.2.el7, kernel-3.10.0-1127.8.2.el7, kernel-abi-whitelists-3.10.0-1127.8.2.el7 +8
    • Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-tools-libs-devel-3.10.0-1127.8.2.el7
  • RHSA-2020:2085 Released 2020-05-12 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux Realtime (v. 7) kernel-rt-3.10.0-1127.8.2.rt56.1103.el7, kernel-rt-debug-3.10.0-1127.8.2.rt56.1103.el7, kernel-rt-debug-devel-3.10.0-1127.8.2.rt56.1103.el7 +4
    • Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt-3.10.0-1127.8.2.rt56.1103.el7, kernel-rt-debug-3.10.0-1127.8.2.rt56.1103.el7, kernel-rt-debug-devel-3.10.0-1127.8.2.rt56.1103.el7 +7
  • RHSA-2020:2104 Released 2020-05-12 · Red Hat rating Important
    kernel-alt security and bug fix update
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) kernel-4.14.0-115.21.2.el7a, kernel-abi-whitelists-4.14.0-115.21.2.el7a, kernel-alt-4.14.0-115.21.2.el7a +8
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) kernel-debug-devel-4.14.0-115.21.2.el7a, kernel-tools-libs-devel-4.14.0-115.21.2.el7a
  • RHSA-2020:1966 Released 2020-04-29 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS E4S (v. 8.0) bpftool-4.18.0-80.18.1.el8_0, kernel-4.18.0-80.18.1.el8_0, kernel-abi-whitelists-4.18.0-80.18.1.el8_0 +14
  • RHSA-2020:1769 Released 2020-04-28 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder (v. 8) kernel-tools-libs-devel-4.18.0-193.el8
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-193.el8, kernel-4.18.0-193.el8, kernel-abi-whitelists-4.18.0-193.el8 +19
  • RHSA-2020:1567 Released 2020-04-28 · Red Hat rating Important
    kernel-rt security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Real Time (v. 8) kernel-rt-4.18.0-193.rt13.51.el8, kernel-rt-core-4.18.0-193.rt13.51.el8, kernel-rt-debug-4.18.0-193.rt13.51.el8 +7
    • Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt-4.18.0-193.rt13.51.el8, kernel-rt-core-4.18.0-193.rt13.51.el8, kernel-rt-debug-4.18.0-193.rt13.51.el8 +9

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 5AffectedNo fix yet
Red Hat Enterprise Linux 6AffectedNo fix yet
Red Hat CodeReady Linux Builder (v. 8)Fixed RHSA-2020:1769
Red Hat CodeReady Linux Builder EUS (v. 8.1)Fixed RHSA-2020:2199
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2020:1769
Red Hat Enterprise Linux BaseOS E4S (v. 8.0)Fixed RHSA-2020:1966
Red Hat Enterprise Linux BaseOS EUS (v. 8.1)Fixed RHSA-2020:2199, RHSA-2020:2203
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2020:2082
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2020:2082
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2020:2082
Red Hat Enterprise Linux ComputeNode EUS (v. 7.6)Fixed RHSA-2020:2289
Red Hat Enterprise Linux ComputeNode EUS (v. 7.7)Fixed RHSA-2020:2522
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2020:2082
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6)Fixed RHSA-2020:2289
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7)Fixed RHSA-2020:2522
Red Hat Enterprise Linux Real Time (v. 8)Fixed RHSA-2020:1567
Red Hat Enterprise Linux Real Time for NFV (v. 8)Fixed RHSA-2020:1567
Red Hat Enterprise Linux Realtime (v. 7)Fixed RHSA-2020:2085
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2020:2082
Red Hat Enterprise Linux Server AUS (v. 7.2)Fixed RHSA-2020:2285
Red Hat Enterprise Linux Server AUS (v. 7.3)Fixed RHSA-2020:2277
Red Hat Enterprise Linux Server AUS (v. 7.4)Fixed RHSA-2020:2214
Red Hat Enterprise Linux Server E4S (v. 7.3)Fixed RHSA-2020:2277
Red Hat Enterprise Linux Server E4S (v. 7.4)Fixed RHSA-2020:2214
Red Hat Enterprise Linux Server EUS (v. 7.6)Fixed RHSA-2020:2289, RHSA-2020:2291
Red Hat Enterprise Linux Server EUS (v. 7.7)Fixed RHSA-2020:2519, RHSA-2020:2522
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2020:2082
Red Hat Enterprise Linux Server Optional AUS (v. 7.2)Fixed RHSA-2020:2285
Red Hat Enterprise Linux Server Optional AUS (v. 7.3)Fixed RHSA-2020:2277
Red Hat Enterprise Linux Server Optional AUS (v. 7.4)Fixed RHSA-2020:2214
Red Hat Enterprise Linux Server Optional E4S (v. 7.3)Fixed RHSA-2020:2277
Red Hat Enterprise Linux Server Optional E4S (v. 7.4)Fixed RHSA-2020:2214
Red Hat Enterprise Linux Server Optional EUS (v. 7.6)Fixed RHSA-2020:2289
Red Hat Enterprise Linux Server Optional EUS (v. 7.7)Fixed RHSA-2020:2522
Red Hat Enterprise Linux Server Optional TUS (v. 7.3)Fixed RHSA-2020:2277
Red Hat Enterprise Linux Server Optional TUS (v. 7.4)Fixed RHSA-2020:2214
Red Hat Enterprise Linux Server TUS (v. 7.3)Fixed RHSA-2020:2277
Red Hat Enterprise Linux Server TUS (v. 7.4)Fixed RHSA-2020:2214
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2020:2082
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2020:2082
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)Fixed RHSA-2020:2104
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)Fixed RHSA-2020:2104
Red Hat Enterprise Linux for Real Time for NFV (v. 7)Fixed RHSA-2020:2085
Red Hat MRG Realtime for RHEL 6 Server v.2Fixed RHSA-2020:2242
Red Hat Virtualization 4.2 Hypervisor for RHEL 7.6 EUSFixed RHSA-2020:2289

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-19768
  2. 2026-10-03 Alias added: GHSA-j7c5-8q8x-hgwf

References

Advisory 7

Other 4

  • 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