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TI-2026-31342 Aliases CVE-2026-43163GHSA-4hfr-m4m2-94ff

md/bitmap: fix GPF in write_page caused by resize race

Priority LOW 20CWE-362Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 42 fixed, 1 without a fix

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

Summary

In the Linux kernel, the following vulnerability has been resolved: md/bitmap: fix GPF in write_page caused by resize race A General Protection Fault occurs in write_page() during array resize: RIP: 0010:write_page+0x22b/0x3c0 [md_mod] This is a use-after-free race between bitmap_daemon_work() and __bitmap_resize(). The daemon iterates over `bitmap->storage.filemap` without locking, while the resize path frees that storage via md_bitmap_file_unmap(). `quiesce()` does not stop the md thread, allowing concurrent access to freed pages. Fix by holding `mddev->bitmap_info.mutex` during the bitmap update.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00091 0th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.10.252, 5.15.202, 6.1.165 +5Red Hat: 14 advisoriesRed Hat: 42 fixed, 1 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
LinuxLinux3.5 and later5.10.252, 5.15.202, 6.1.165, 6.6.128, 6.12.75, 6.18.16, 6.19.6, 7.0Patch availableCNA
  • Linux VendorLinux Affected 3.5 and later Fixed in 5.10.252, 5.15.202, 6.1.165, 6.6.128, 6.12.75, 6.18.16, 6.19.6, 7.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*3.5 to before 5.10.252; 5.11 to before 5.15.202; 5.16 to before 6.1.165; 6.2 to before 6.6.128; 6.7 to before 6.12.75; 6.13 to before 6.18.16; 6.19 to before 6.19.6VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 3.5 to before 5.10.252; 5.11 to before 5.15.202; 5.16 to before 6.1.165; 6.2 to before 6.6.128; 6.7 to before 6.12.75; 6.13 to before 6.18.16; 6.19 to before 6.19.6 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 5.10.252, 5.15.202, 6.1.165, 6.6.128, 6.12.75, 6.18.16, 6.19.6, 7.0

Red Hat 14 advisories

  • RHSA-2026:53989 Released 2026-08-12 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.6) bpftool-4.18.0-372.206.1.el8_6, kernel-4.18.0-372.206.1.el8_6, kernel-abi-stablelists-4.18.0-372.206.1.el8_6 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) bpftool-4.18.0-372.206.1.el8_6, kernel-4.18.0-372.206.1.el8_6, kernel-abi-stablelists-4.18.0-372.206.1.el8_6 +14
  • RHSA-2026:41236 Released 2026-07-17 · Red Hat rating Critical
    kernel-rt security, bug fix, and enhancement update
    • Red Hat Enterprise Linux for Real Time (v. 7 ELS) kernel-rt-3.10.0-1160.155.1.rt56.1307.el7, kernel-rt-debug-3.10.0-1160.155.1.rt56.1307.el7, kernel-rt-debug-devel-3.10.0-1160.155.1.rt56.1307.el7 +4
  • RHSA-2026:38492 Released 2026-07-13 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-211.33.1.el10_2, kernel-64k-debug-devel-matched-6.12.0-211.33.1.el10_2, kernel-64k-devel-6.12.0-211.33.1.el10_2 +12
    • Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-211.33.1.el10_2, kernel-64k-6.12.0-211.33.1.el10_2, kernel-64k-core-6.12.0-211.33.1.el10_2 +29
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-211.33.1.el10_2, libperf-6.12.0-211.33.1.el10_2
    • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-211.33.1.el10_2, kernel-rt-64k-6.12.0-211.33.1.el10_2, kernel-rt-64k-core-6.12.0-211.33.1.el10_2 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-211.33.1.el10_2, kernel-rt-core-6.12.0-211.33.1.el10_2, kernel-rt-debug-6.12.0-211.33.1.el10_2 +9
Show 11 more Red Hat advisories
  • RHSA-2026:26563 Released 2026-06-17 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS E4S (v.8.8) bpftool-4.18.0-477.147.1.el8_8, kernel-4.18.0-477.147.1.el8_8, kernel-abi-stablelists-4.18.0-477.147.1.el8_8 +14
    • Red Hat Enterprise Linux BaseOS TUS (v.8.8) bpftool-4.18.0-477.147.1.el8_8, kernel-4.18.0-477.147.1.el8_8, kernel-abi-stablelists-4.18.0-477.147.1.el8_8 +14
  • RHSA-2026:26535 Released 2026-06-17 · Red Hat rating Critical
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.4) bpftool-4.18.0-305.194.1.el8_4, kernel-4.18.0-305.194.1.el8_4, kernel-abi-stablelists-4.18.0-305.194.1.el8_4 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) bpftool-4.18.0-305.194.1.el8_4, kernel-4.18.0-305.194.1.el8_4, kernel-abi-stablelists-4.18.0-305.194.1.el8_4 +14
  • RHSA-2026:25095 Released 2026-06-10 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux Server (v. 7 ELS) bpftool-3.10.0-1160.151.1.el7, kernel-3.10.0-1160.151.1.el7, kernel-abi-whitelists-3.10.0-1160.151.1.el7 +11
    • Red Hat Enterprise Linux Server Optional (v. 7 ELS) kernel-debug-devel-3.10.0-1160.151.1.el7, kernel-tools-libs-devel-3.10.0-1160.151.1.el7
  • RHSA-2026:23224 Released 2026-06-04 · Red Hat rating Important
    kernel security update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) kernel-tools-libs-devel-5.14.0-570.119.1.el9_6, libperf-5.14.0-570.119.1.el9_6
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) kernel-64k-debug-devel-5.14.0-570.119.1.el9_6, kernel-64k-debug-devel-matched-5.14.0-570.119.1.el9_6, kernel-64k-devel-5.14.0-570.119.1.el9_6 +12
    • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel-5.14.0-570.119.1.el9_6, kernel-64k-5.14.0-570.119.1.el9_6, kernel-64k-core-5.14.0-570.119.1.el9_6 +28
    • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt-5.14.0-570.119.1.el9_6, kernel-rt-64k-5.14.0-570.119.1.el9_6, kernel-rt-64k-core-5.14.0-570.119.1.el9_6 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt-5.14.0-570.119.1.el9_6, kernel-rt-core-5.14.0-570.119.1.el9_6, kernel-rt-debug-5.14.0-570.119.1.el9_6 +11
  • RHSA-2026:22940 Released 2026-06-03 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) kernel-64k-debug-devel-5.14.0-284.174.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.174.1.el9_2, kernel-64k-devel-5.14.0-284.174.1.el9_2 +10
    • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool-7.0.0-284.174.1.el9_2, kernel-5.14.0-284.174.1.el9_2, kernel-64k-5.14.0-284.174.1.el9_2 +29
  • RHSA-2026:22900 Released 2026-06-03 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt-5.14.0-284.174.1.rt14.459.el9_2, kernel-rt-core-5.14.0-284.174.1.rt14.459.el9_2, kernel-rt-debug-5.14.0-284.174.1.rt14.459.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt-5.14.0-284.174.1.rt14.459.el9_2, kernel-rt-core-5.14.0-284.174.1.rt14.459.el9_2, kernel-rt-debug-5.14.0-284.174.1.rt14.459.el9_2 +11
  • RHSA-2026:22334 Released 2026-06-01 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) kernel-64k-debug-devel-6.12.0-55.76.1.el10_0, kernel-64k-debug-devel-matched-6.12.0-55.76.1.el10_0, kernel-64k-devel-6.12.0-55.76.1.el10_0 +12
    • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel-6.12.0-55.76.1.el10_0, kernel-64k-6.12.0-55.76.1.el10_0, kernel-64k-core-6.12.0-55.76.1.el10_0 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) kernel-tools-libs-devel-6.12.0-55.76.1.el10_0, libperf-6.12.0-55.76.1.el10_0
    • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt-6.12.0-55.76.1.el10_0, kernel-rt-64k-6.12.0-55.76.1.el10_0, kernel-rt-64k-core-6.12.0-55.76.1.el10_0 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt-6.12.0-55.76.1.el10_0, kernel-rt-core-6.12.0-55.76.1.el10_0, kernel-rt-debug-6.12.0-55.76.1.el10_0 +11
  • RHSA-2026:21745 Released 2026-05-28 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.126.1.rt7.467.el8_10, kernel-rt-core-4.18.0-553.126.1.rt7.467.el8_10, kernel-rt-debug-4.18.0-553.126.1.rt7.467.el8_10 +9
    • Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.126.1.rt7.467.el8_10, kernel-rt-core-4.18.0-553.126.1.rt7.467.el8_10, kernel-rt-debug-4.18.0-553.126.1.rt7.467.el8_10 +7
  • RHSA-2026:21706 Released 2026-05-28 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.126.1.el8_10, kernel-4.18.0-553.126.1.el8_10, kernel-abi-stablelists-4.18.0-553.126.1.el8_10 +19
    • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.126.1.el8_10
  • RHSA-2026:21209 Released 2026-05-27 · Red Hat rating Important
    kernel security update
    • Red Hat CodeReady Linux Builder EUS (v.9.4) kernel-tools-libs-devel-5.14.0-427.127.1.el9_4, libperf-5.14.0-427.127.1.el9_4
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) kernel-64k-debug-devel-5.14.0-427.127.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.127.1.el9_4, kernel-64k-devel-5.14.0-427.127.1.el9_4 +11
    • Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool-7.3.0-427.127.1.el9_4, kernel-5.14.0-427.127.1.el9_4, kernel-64k-5.14.0-427.127.1.el9_4 +29
    • Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt-5.14.0-427.127.1.el9_4, kernel-rt-core-5.14.0-427.127.1.el9_4, kernel-rt-debug-5.14.0-427.127.1.el9_4 +9
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4) kernel-rt-5.14.0-427.127.1.el9_4, kernel-rt-core-5.14.0-427.127.1.el9_4, kernel-rt-debug-5.14.0-427.127.1.el9_4 +11
  • RHSA-2026:19568 Released 2026-05-20 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-687.10.1.el9_8, kernel-64k-debug-devel-matched-5.14.0-687.10.1.el9_8, kernel-64k-devel-5.14.0-687.10.1.el9_8 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-687.10.1.el9_8, kernel-64k-5.14.0-687.10.1.el9_8, kernel-64k-core-5.14.0-687.10.1.el9_8 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-687.10.1.el9_8, libperf-5.14.0-687.10.1.el9_8
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-687.10.1.el9_8, kernel-rt-64k-5.14.0-687.10.1.el9_8, kernel-rt-64k-core-5.14.0-687.10.1.el9_8 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-687.10.1.el9_8, kernel-rt-core-5.14.0-687.10.1.el9_8, kernel-rt-debug-5.14.0-687.10.1.el9_8 +9

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat CodeReady Linux Builder EUS (v.9.4)Fixed RHSA-2026:21209
Red Hat CodeReady Linux Builder EUS (v.9.6)Fixed RHSA-2026:23224
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:38492
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:19568
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:22940
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:22334
Red Hat Enterprise Linux AppStream EUS (v.9.4)Fixed RHSA-2026:21209
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:23224
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2026:38492
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2026:21706
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2026:19568
Red Hat Enterprise Linux BaseOS AUS (v.8.4)Fixed RHSA-2026:26535
Red Hat Enterprise Linux BaseOS AUS (v.8.6)Fixed RHSA-2026:53989
Red Hat Enterprise Linux BaseOS E4S (v.8.8)Fixed RHSA-2026:26563
Red Hat Enterprise Linux BaseOS E4S (v.9.2)Fixed RHSA-2026:22940
Red Hat Enterprise Linux BaseOS EUS (v. 10.0)Fixed RHSA-2026:22334
Red Hat Enterprise Linux BaseOS EUS (v.9.4)Fixed RHSA-2026:21209
Red Hat Enterprise Linux BaseOS EUS (v.9.6)Fixed RHSA-2026:23224
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)Fixed RHSA-2026:26535
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6)Fixed RHSA-2026:53989
Red Hat Enterprise Linux BaseOS TUS (v.8.8)Fixed RHSA-2026:26563
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2026:21706
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:38492
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:19568
Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)Fixed RHSA-2026:22334
Red Hat Enterprise Linux NFV (v. 8)Fixed RHSA-2026:21745
Red Hat Enterprise Linux RT (v. 8)Fixed RHSA-2026:21745
Red Hat Enterprise Linux Real Time (v. 10)Fixed RHSA-2026:38492
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2026:19568
Red Hat Enterprise Linux Real Time E4S (v.9.2)Fixed RHSA-2026:22900
Red Hat Enterprise Linux Real Time EUS (v. 10.0)Fixed RHSA-2026:22334
Red Hat Enterprise Linux Real Time EUS (v.9.4)Fixed RHSA-2026:21209
Red Hat Enterprise Linux Real Time EUS (v.9.6)Fixed RHSA-2026:23224
Red Hat Enterprise Linux Real Time for NFV (v. 10)Fixed RHSA-2026:38492
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2026:19568
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)Fixed RHSA-2026:22900
Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0)Fixed RHSA-2026:22334
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4)Fixed RHSA-2026:21209
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6)Fixed RHSA-2026:23224
Red Hat Enterprise Linux Server (v. 7 ELS)Fixed RHSA-2026:25095
Red Hat Enterprise Linux Server Optional (v. 7 ELS)Fixed RHSA-2026:25095
Red Hat Enterprise Linux for Real Time (v. 7 ELS)Fixed RHSA-2026:41236
Not affected: 1 product
  • Red Hat Enterprise Linux 6

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-43163
  2. 2026-10-03 Alias added: GHSA-4hfr-m4m2-94ff
  3. 2026-11-06 CISA SSVC decision points changed

References

Patch 8

  • 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