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TI-2026-38271 Aliases CVE-2026-53185GHSA-4pqw-3h25-qrq3

zram: fix use-after-free in zram_bvec_write_partial()

Priority LOW 35CWE-364Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 34 fixed, 1 without a fix

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

Summary

In the Linux kernel, the following vulnerability has been resolved: zram: fix use-after-free in zram_bvec_write_partial() zram_read_page() picks the sync or async backing device read path based on whether the parent bio is NULL. zram_bvec_write_partial() passes its parent bio down, so for ZRAM_WB slots the read is dispatched asynchronously and zram_read_page() returns 0 while the bio is still in flight. The caller then runs memcpy_from_bvec(), zram_write_page() and __free_page() on the buffer, leaving the async read to write into a freed page. zram_bvec_read_partial() was switched to NULL in commit 4e3c87b9421d ("zram: fix synchronous reads") for the same reason; the write_partial counterpart was missed.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00107 1st percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.6.143, 6.12.94, 6.18.36 +2Red Hat: 10 advisoriesRed Hat: 34 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux4.14 and later6.6.143, 6.12.94, 6.18.36, 7.0.13, 7.1Patch availableCNA
  • Linux VendorLinux Affected 4.14 and later Fixed in 6.6.143, 6.12.94, 6.18.36, 7.0.13, 7.1 Patch available CNA

CPE configurations NVD · 8

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*4.14 to before 6.6.143; 6.7 to before 6.12.94; 6.13 to before 6.18.36; 6.19 to before 7.0.13VulnerableLinux
cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*7.1 rc1VulnerableLinux
cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*7.1 rc2VulnerableLinux
cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*7.1 rc3VulnerableLinux
cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*7.1 rc4VulnerableLinux
cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:*7.1 rc5VulnerableLinux
cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:*7.1 rc6VulnerableLinux
cpe:2.3:o:linux:linux_kernel:7.1:rc7:*:*:*:*:*:*7.1 rc7VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.14 to before 6.6.143; 6.7 to before 6.12.94; 6.13 to before 6.18.36; 6.19 to before 7.0.13 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* Versions 7.1 rc1 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* Versions 7.1 rc2 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* Versions 7.1 rc3 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* Versions 7.1 rc4 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* Versions 7.1 rc5 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:* Versions 7.1 rc6 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:7.1:rc7:*:*:*:*:*:* Versions 7.1 rc7 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 6.6.143, 6.12.94, 6.18.36, 7.0.13, 7.1

Red Hat 10 advisories

  • RHSA-2026:77215 Released 2026-10-07 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) kernel-64k-debug-devel-5.14.0-284.195.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.195.1.el9_2, kernel-64k-devel-5.14.0-284.195.1.el9_2 +10
    • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool-7.0.0-284.195.1.el9_2, kernel-5.14.0-284.195.1.el9_2, kernel-64k-5.14.0-284.195.1.el9_2 +29
  • RHSA-2026:77214 Released 2026-10-07 · Red Hat rating Important
    kernel-rt security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt-5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-core-5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-debug-5.14.0-284.195.1.rt14.480.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt-5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-core-5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-debug-5.14.0-284.195.1.rt14.480.el9_2 +11
  • RHSA-2026:73645 Released 2026-09-30 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream E4S (v.9.4) kernel-64k-debug-devel-5.14.0-427.153.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.153.1.el9_4, kernel-64k-devel-5.14.0-427.153.1.el9_4 +11
    • Red Hat Enterprise Linux BaseOS E4S (v.9.4) bpftool-7.3.0-427.153.1.el9_4, kernel-5.14.0-427.153.1.el9_4, kernel-64k-5.14.0-427.153.1.el9_4 +29
    • Red Hat Enterprise Linux Real Time E4S (v.9.4) kernel-rt-5.14.0-427.153.1.el9_4, kernel-rt-core-5.14.0-427.153.1.el9_4, kernel-rt-debug-5.14.0-427.153.1.el9_4 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) kernel-rt-5.14.0-427.153.1.el9_4, kernel-rt-core-5.14.0-427.153.1.el9_4, kernel-rt-debug-5.14.0-427.153.1.el9_4 +11
Show 7 more Red Hat advisories
  • RHSA-2026:69837 Released 2026-09-22 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS E4S (v.8.8) bpftool-4.18.0-477.168.1.el8_8, kernel-4.18.0-477.168.1.el8_8, kernel-abi-stablelists-4.18.0-477.168.1.el8_8 +14
    • Red Hat Enterprise Linux BaseOS TUS (v.8.8) bpftool-4.18.0-477.168.1.el8_8, kernel-4.18.0-477.168.1.el8_8, kernel-abi-stablelists-4.18.0-477.168.1.el8_8 +14
  • RHSA-2026:69089 Released 2026-09-21 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) kernel-64k-debug-devel-6.12.0-55.105.1.el10_0, kernel-64k-debug-devel-matched-6.12.0-55.105.1.el10_0, kernel-64k-devel-6.12.0-55.105.1.el10_0 +12
    • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel-6.12.0-55.105.1.el10_0, kernel-64k-6.12.0-55.105.1.el10_0, kernel-64k-core-6.12.0-55.105.1.el10_0 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) kernel-tools-libs-devel-6.12.0-55.105.1.el10_0, libperf-6.12.0-55.105.1.el10_0
    • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt-6.12.0-55.105.1.el10_0, kernel-rt-64k-6.12.0-55.105.1.el10_0, kernel-rt-64k-core-6.12.0-55.105.1.el10_0 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt-6.12.0-55.105.1.el10_0, kernel-rt-core-6.12.0-55.105.1.el10_0, kernel-rt-debug-6.12.0-55.105.1.el10_0 +11
  • RHSA-2026:65708 Released 2026-09-09 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) kernel-tools-libs-devel-5.14.0-570.140.1.el9_6, libperf-5.14.0-570.140.1.el9_6
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) kernel-64k-debug-devel-5.14.0-570.140.1.el9_6, kernel-64k-debug-devel-matched-5.14.0-570.140.1.el9_6, kernel-64k-devel-5.14.0-570.140.1.el9_6 +12
    • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel-5.14.0-570.140.1.el9_6, kernel-64k-5.14.0-570.140.1.el9_6, kernel-64k-core-5.14.0-570.140.1.el9_6 +28
    • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt-5.14.0-570.140.1.el9_6, kernel-rt-64k-5.14.0-570.140.1.el9_6, kernel-rt-64k-core-5.14.0-570.140.1.el9_6 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt-5.14.0-570.140.1.el9_6, kernel-rt-core-5.14.0-570.140.1.el9_6, kernel-rt-debug-5.14.0-570.140.1.el9_6 +11
  • RHSA-2026:63014 Released 2026-09-03 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.159.1.el8_10, kernel-4.18.0-553.159.1.el8_10, kernel-abi-stablelists-4.18.0-553.159.1.el8_10 +19
    • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.159.1.el8_10
  • RHSA-2026:63013 Released 2026-09-03 · Red Hat rating Important
    kernel-rt security, bug fix, and enhancement update
    • Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.159.1.rt7.500.el8_10, kernel-rt-core-4.18.0-553.159.1.rt7.500.el8_10, kernel-rt-debug-4.18.0-553.159.1.rt7.500.el8_10 +9
    • Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.159.1.rt7.500.el8_10, kernel-rt-core-4.18.0-553.159.1.rt7.500.el8_10, kernel-rt-debug-4.18.0-553.159.1.rt7.500.el8_10 +7
  • RHSA-2026:61887 Released 2026-09-01 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-211.50.1.el10_2, kernel-64k-debug-devel-matched-6.12.0-211.50.1.el10_2, kernel-64k-devel-6.12.0-211.50.1.el10_2 +12
    • Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-211.50.1.el10_2, kernel-64k-6.12.0-211.50.1.el10_2, kernel-64k-core-6.12.0-211.50.1.el10_2 +29
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-211.50.1.el10_2, libperf-6.12.0-211.50.1.el10_2
    • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-211.50.1.el10_2, kernel-rt-64k-6.12.0-211.50.1.el10_2, kernel-rt-64k-core-6.12.0-211.50.1.el10_2 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-211.50.1.el10_2, kernel-rt-core-6.12.0-211.50.1.el10_2, kernel-rt-debug-6.12.0-211.50.1.el10_2 +9
  • RHSA-2026:59723 Released 2026-08-26 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-687.42.1.el9_8, kernel-64k-debug-devel-matched-5.14.0-687.42.1.el9_8, kernel-64k-devel-5.14.0-687.42.1.el9_8 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-687.42.1.el9_8, kernel-64k-5.14.0-687.42.1.el9_8, kernel-64k-core-5.14.0-687.42.1.el9_8 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-687.42.1.el9_8, libperf-5.14.0-687.42.1.el9_8
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-687.42.1.el9_8, kernel-rt-64k-5.14.0-687.42.1.el9_8, kernel-rt-64k-core-5.14.0-687.42.1.el9_8 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-687.42.1.el9_8, kernel-rt-core-5.14.0-687.42.1.el9_8, kernel-rt-debug-5.14.0-687.42.1.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.9.6)Fixed RHSA-2026:65708
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:61887
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:59723
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:77215
Red Hat Enterprise Linux AppStream E4S (v.9.4)Fixed RHSA-2026:73645
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:69089
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:65708
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2026:61887
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2026:63014
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2026:59723
Red Hat Enterprise Linux BaseOS E4S (v.8.8)Fixed RHSA-2026:69837
Red Hat Enterprise Linux BaseOS E4S (v.9.2)Fixed RHSA-2026:77215
Red Hat Enterprise Linux BaseOS E4S (v.9.4)Fixed RHSA-2026:73645
Red Hat Enterprise Linux BaseOS EUS (v. 10.0)Fixed RHSA-2026:69089
Red Hat Enterprise Linux BaseOS EUS (v.9.6)Fixed RHSA-2026:65708
Red Hat Enterprise Linux BaseOS TUS (v.8.8)Fixed RHSA-2026:69837
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2026:63014
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:61887
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:59723
Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)Fixed RHSA-2026:69089
Red Hat Enterprise Linux NFV (v. 8)Fixed RHSA-2026:63013
Red Hat Enterprise Linux RT (v. 8)Fixed RHSA-2026:63013
Red Hat Enterprise Linux Real Time (v. 10)Fixed RHSA-2026:61887
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2026:59723
Red Hat Enterprise Linux Real Time E4S (v.9.2)Fixed RHSA-2026:77214
Red Hat Enterprise Linux Real Time E4S (v.9.4)Fixed RHSA-2026:73645
Red Hat Enterprise Linux Real Time EUS (v. 10.0)Fixed RHSA-2026:69089
Red Hat Enterprise Linux Real Time EUS (v.9.6)Fixed RHSA-2026:65708
Red Hat Enterprise Linux Real Time for NFV (v. 10)Fixed RHSA-2026:61887
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2026:59723
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)Fixed RHSA-2026:77214
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4)Fixed RHSA-2026:73645
Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0)Fixed RHSA-2026:69089
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6)Fixed RHSA-2026:65708
Not affected: 2 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-53185
  2. 2026-10-03 Alias added: GHSA-4pqw-3h25-qrq3
  3. 2026-10-07 Fix available: RHSA-2026:77214 · Red Hat
  4. 2026-10-07 Fix available: RHSA-2026:77215 · Red Hat
  5. 2026-10-07 Fix available: Red Hat Enterprise Linux AppStream E4S (v.9.2), Red Hat Enterprise Linux BaseOS E4S (v.9.2), Red Hat Enterprise Linux Real Time E4S (v.9.2) +1 · Red Hat
  6. 2026-10-16 CISA SSVC decision points changed
  7. 2026-10-19 Weakness changed · CISA ADP

References

Patch 5

Advisory 3

  • 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