fuse: re-lock request before replacing page cache folio
Priority LOW 35CWE-416Published · 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: 16 fixed, 3 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: fuse: re-lock request before replacing page cache folio fuse_try_move_folio() unlocks the request on entry but does not re-lock it on the success path. This means fuse_chan_abort() can end the request and free the fuse_io_args (eg fuse_readpages_end()) while the subsequent copy chain logic after fuse_try_move_folio() accesses the fuse_io_args, leading to use-after-free issues. Fix this by calling lock_request() before replace_page_cache_folio(). This ensures the request is locked on the success path which will prevent the fuse_io_args from being freed while the later copying logic runs, and also ensures that the ap->folios[i]->mapping is never null since ap->folios[i] will always point to the newfolio after replace_page_cache_folio().
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00133 2nd percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.15.211, 6.1.177, 6.6.144 +5Red Hat: 4 advisoriesRed Hat: 16 fixed, 3 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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 2.6.35 and later | 5.15.211, 6.1.177, 6.6.144, 6.12.95, 6.18.37, 7.0.14, 7.1.2, 7.2 | Patch available | CNA |
- Linux VendorLinux Affected 2.6.35 and later Fixed in 5.15.211, 6.1.177, 6.6.144, 6.12.95, 6.18.37, 7.0.14, 7.1.2, 7.2 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 2.6.35 to before 5.15.211; 5.16 to before 6.1.177; 6.2 to before 6.6.144; 6.7 to before 6.12.95; 6.13 to before 6.18.37; 6.19 to before 7.0.14; 7.1 to before 7.1.2 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 2.6.35 to before 5.15.211; 5.16 to before 6.1.177; 6.2 to before 6.6.144; 6.7 to before 6.12.95; 6.13 to before 6.18.37; 6.19 to before 7.0.14; 7.1 to before 7.1.2 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.15.211, 6.1.177, 6.6.144, 6.12.95, 6.18.37, 7.0.14, 7.1.2, 7.2
Red Hat 4 advisories
- RHSA-2026:91565 Released 2026-10-28 · Red Hat rating Importantkernel security, bug fix, and enhancement update
- 10Base-SMTV kernel-modules-internal-6.12.0-211.69.1.el10_2
- Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-211.69.1.el10_2, kernel-64k-debug-devel-matched-6.12.0-211.69.1.el10_2, kernel-64k-devel-6.12.0-211.69.1.el10_2 +12
- Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-211.69.1.el10_2, kernel-64k-6.12.0-211.69.1.el10_2, kernel-64k-core-6.12.0-211.69.1.el10_2 +29
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-211.69.1.el10_2, libperf-6.12.0-211.69.1.el10_2
- Red Hat Enterprise Linux Hidden (v. 10) kernel-modules-internal-6.12.0-211.69.1.el10_2
- Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-211.69.1.el10_2, kernel-rt-64k-6.12.0-211.69.1.el10_2, kernel-rt-64k-core-6.12.0-211.69.1.el10_2 +21
- Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-211.69.1.el10_2, kernel-rt-core-6.12.0-211.69.1.el10_2, kernel-rt-debug-6.12.0-211.69.1.el10_2 +9
- RHSA-2026:90365 Released 2026-10-26 · Red Hat rating Importantkernel security, bug fix, and enhancement update
- Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-687.61.1.el9_8, kernel-64k-debug-devel-matched-5.14.0-687.61.1.el9_8, kernel-64k-devel-5.14.0-687.61.1.el9_8 +12
- Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-687.61.1.el9_8, kernel-64k-5.14.0-687.61.1.el9_8, kernel-64k-core-5.14.0-687.61.1.el9_8 +28
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-687.61.1.el9_8, libperf-5.14.0-687.61.1.el9_8
- Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-687.61.1.el9_8, kernel-rt-64k-5.14.0-687.61.1.el9_8, kernel-rt-64k-core-5.14.0-687.61.1.el9_8 +21
- Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-687.61.1.el9_8, kernel-rt-core-5.14.0-687.61.1.el9_8, kernel-rt-debug-5.14.0-687.61.1.el9_8 +9
- RHSA-2026:89083 Released 2026-10-24 · Red Hat rating Importantkernel security, bug fix, and enhancement update
- Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.178.1.el8_10, kernel-4.18.0-553.178.1.el8_10, kernel-abi-stablelists-4.18.0-553.178.1.el8_10 +19
- Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.178.1.el8_10
Show 1 more Red Hat advisories
- RHSA-2026:89082 Released 2026-10-24 · Red Hat rating Importantkernel-rt security, bug fix, and enhancement update
- Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.178.1.rt7.519.el8_10, kernel-rt-core-4.18.0-553.178.1.rt7.519.el8_10, kernel-rt-debug-4.18.0-553.178.1.rt7.519.el8_10 +9
- Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.178.1.rt7.519.el8_10, kernel-rt-core-4.18.0-553.178.1.rt7.519.el8_10, kernel-rt-debug-4.18.0-553.178.1.rt7.519.el8_10 +7
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix yet |
| Red Hat Enterprise Linux 9 | Affected | No fix yet |
| 10Base-SMTV | Fixed | RHSA-2026:91565 |
| Red Hat Enterprise Linux AppStream (v. 10) | Fixed | RHSA-2026:91565 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2026:90365 |
| Red Hat Enterprise Linux BaseOS (v. 10) | Fixed | RHSA-2026:91565 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2026:89083 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2026:90365 |
| Red Hat Enterprise Linux CRB (v. 8) | Fixed | RHSA-2026:89083 |
| Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) | Fixed | RHSA-2026:91565 |
| Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) | Fixed | RHSA-2026:90365 |
| Red Hat Enterprise Linux Hidden (v. 10) | Fixed | RHSA-2026:91565 |
| Red Hat Enterprise Linux NFV (v. 8) | Fixed | RHSA-2026:89082 |
| Red Hat Enterprise Linux RT (v. 8) | Fixed | RHSA-2026:89082 |
| Red Hat Enterprise Linux Real Time (v. 10) | Fixed | RHSA-2026:91565 |
| Red Hat Enterprise Linux Real Time (v. 9) | Fixed | RHSA-2026:90365 |
| Red Hat Enterprise Linux Real Time for NFV (v. 10) | Fixed | RHSA-2026:91565 |
| Red Hat Enterprise Linux Real Time for NFV (v. 9) | Fixed | RHSA-2026:90365 |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-53388
- 2026-10-03 Alias added: GHSA-45w6-5frg-3vfq
- 2026-10-13 Affected versions changed · Red Hat
- 2026-10-16 CISA SSVC decision points changed
- 2026-10-19 Weakness changed · CISA ADP
- 2026-10-26 Fix available: RHSA-2026:89083 · Red Hat
- 2026-10-26 Fix available: Red Hat Enterprise Linux BaseOS (v. 8), Red Hat Enterprise Linux CRB (v. 8) · Red Hat
- 2026-10-26 Fix available: RHSA-2026:89082 · Red Hat
- 2026-10-26 Fix available: Red Hat Enterprise Linux NFV (v. 8), Red Hat Enterprise Linux RT (v. 8) · Red Hat
- 2026-10-27 Fix available: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux BaseOS (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) +2 · Red Hat
- 2026-10-29 Fix available: RHSA-2026:90365 · Red Hat
- 2026-10-29 Fix available: RHSA-2026:91565 · Red Hat
- 2026-10-30 Fix available: 10Base-SMTV, Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10) +4 · Red Hat
References
Patch 8
- https://git.kernel.org/stable/c/7c18691e0cfda29672f79bafde8abdb7710674f6
- https://git.kernel.org/stable/c/5927b43a4f8d89e86930f524bf63e9c7e66f61b4
- https://git.kernel.org/stable/c/030fe3e9d8abdee303dd7e9e42f45082d382a407
- https://git.kernel.org/stable/c/46473ddccdc5065033e397d6e62c280dbcd3d9c2
- https://git.kernel.org/stable/c/af2892249d982a1c036ca456cc135374e68b6677
- https://git.kernel.org/stable/c/0223f452532d9cd8a5e87c45de828fd93c99bd25
- https://git.kernel.org/stable/c/e28db6ac4792d065ab32565fd9f0a2361c3d4666
- https://git.kernel.org/stable/c/a078484921052d0badd827fcc2770b5cfc1d4120
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Sources
- CVE-2026-53388 · CVE Program
- CVE-2026-53388 · NVD
- FIRST EPSS
- GHSA-45w6-5frg-3vfq · GitHub Advisory Database · CC BY 4.0
- CVE-2026-53388 · Red Hat security data · CC BY 4.0
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