# CVE-2026-31716: linux: In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: validate rec->used in journal-replay f... CVE-2026-31716 is fixed in 56 products on 1 platform, first by ALAS2023-2026-1693, released May 8, 2026. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2026-31716 - Priority: High - CVSS: 7.8 (high) - EPSS: 0.0013 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: May 1, 2026 ## Description In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: validate rec->used in journal-replay file record check check_file_record() validates rec->total against the record size but never validates rec->used. The do_action() journal-replay handlers read rec->used from disk and use it to compute memmove lengths: DeleteAttribute: memmove(attr, ..., used - asize - roff) CreateAttribute: memmove(..., attr, used - roff) change_attr_size: memmove(..., used - PtrOffset(rec, next)) When rec->used is smaller than the offset of a validated attribute, or larger than the record size, these subtractions can underflow allowing us to copy huge amounts of memory in to a 4kb buffer, generally considered a bad idea overall. This requires a corrupted filesystem, which isn't a threat model the kernel really needs to worry about, but checking for such an obvious out-of-bounds value is good to keep things robust, especially on journal replay Fix this up by bounding rec->used correctly. This is much like commit b2bc7c44ed17 ("fs/ntfs3: Fix slab-out-of-bounds read in DeleteIndexEntryRoot") which checked different values in this same switch statement. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | bpftool amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | bpftool-debuginfo amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | bpftool6.12 amzn 2023 | 1:6.12.90-120.164.amzn2023 | [ALAS2023-2026-1816](https://patchblox.com/security/data/fix/linux/alas2023-2026-1816.md) | Jun 8, 2026 | | Linux | bpftool6.12-debuginfo amzn 2023 | 1:6.12.90-120.164.amzn2023 | [ALAS2023-2026-1816](https://patchblox.com/security/data/fix/linux/alas2023-2026-1816.md) | Jun 8, 2026 | | Linux | bpftool6.18 amzn 2023 | 1:6.18.25-55.108.amzn2023 | [ALAS2023-2026-1693](https://patchblox.com/security/data/fix/linux/alas2023-2026-1693.md) | May 8, 2026 | | Linux | bpftool6.18-debuginfo amzn 2023 | 1:6.18.25-55.108.amzn2023 | [ALAS2023-2026-1693](https://patchblox.com/security/data/fix/linux/alas2023-2026-1693.md) | May 8, 2026 | | Linux | kernel amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | kernel-debuginfo amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | kernel-debuginfo-common-aarch64 amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | kernel-debuginfo-common-x86_64 amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | kernel-devel amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | kernel-headers amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | kernel-livepatch-6.1.175-219.357 amzn 2023 | 1:1.0-0.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | kernel-livepatch-6.12.88-119.157 amzn 2023 | 1:1.0-0.amzn2023 | [ALAS2023-2026-1753](https://patchblox.com/security/data/fix/linux/alas2023-2026-1753.md) | May 25, 2026 | | Linux | kernel-livepatch-6.12.90-120.164 amzn 2023 | 1:1.0-0.amzn2023 | [ALAS2023-2026-1816](https://patchblox.com/security/data/fix/linux/alas2023-2026-1816.md) | Jun 8, 2026 | | Linux | kernel-livepatch-6.18.25-55.108 amzn 2023 | 1:1.0-0.amzn2023 | [ALAS2023-2026-1693](https://patchblox.com/security/data/fix/linux/alas2023-2026-1693.md) | May 8, 2026 | | Linux | kernel-modules-extra amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | kernel-modules-extra-common amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | kernel-tools amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | kernel-tools-debuginfo amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | kernel-tools-devel amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | kernel6.12 amzn 2023 | 1:6.12.90-120.164.amzn2023 | [ALAS2023-2026-1816](https://patchblox.com/security/data/fix/linux/alas2023-2026-1816.md) | Jun 8, 2026 | | Linux | kernel6.12-debuginfo amzn 2023 | 1:6.12.90-120.164.amzn2023 | [ALAS2023-2026-1816](https://patchblox.com/security/data/fix/linux/alas2023-2026-1816.md) | Jun 8, 2026 | | Linux | kernel6.12-debuginfo-common-aarch64 amzn 2023 | 1:6.12.90-120.164.amzn2023 | [ALAS2023-2026-1816](https://patchblox.com/security/data/fix/linux/alas2023-2026-1816.md) | Jun 8, 2026 | | Linux | kernel6.12-debuginfo-common-x86_64 amzn 2023 | 1:6.12.90-120.164.amzn2023 | [ALAS2023-2026-1816](https://patchblox.com/security/data/fix/linux/alas2023-2026-1816.md) | Jun 8, 2026 | | Linux | kernel6.12-devel amzn 2023 | 1:6.12.90-120.164.amzn2023 | [ALAS2023-2026-1816](https://patchblox.com/security/data/fix/linux/alas2023-2026-1816.md) | Jun 8, 2026 | | Linux | kernel6.12-headers amzn 2023 | 1:6.12.90-120.164.amzn2023 | [ALAS2023-2026-1816](https://patchblox.com/security/data/fix/linux/alas2023-2026-1816.md) | Jun 8, 2026 | | Linux | kernel6.12-modules-extra amzn 2023 | 1:6.12.90-120.164.amzn2023 | [ALAS2023-2026-1816](https://patchblox.com/security/data/fix/linux/alas2023-2026-1816.md) | Jun 8, 2026 | | Linux | kernel6.12-modules-extra-common amzn 2023 | 1:6.12.90-120.164.amzn2023 | [ALAS2023-2026-1816](https://patchblox.com/security/data/fix/linux/alas2023-2026-1816.md) | Jun 8, 2026 | | Linux | kernel6.12-tools amzn 2023 | 1:6.12.90-120.164.amzn2023 | [ALAS2023-2026-1816](https://patchblox.com/security/data/fix/linux/alas2023-2026-1816.md) | Jun 8, 2026 | | Linux | kernel6.12-tools-debuginfo amzn 2023 | 1:6.12.90-120.164.amzn2023 | [ALAS2023-2026-1816](https://patchblox.com/security/data/fix/linux/alas2023-2026-1816.md) | Jun 8, 2026 | | Linux | kernel6.12-tools-devel amzn 2023 | 1:6.12.90-120.164.amzn2023 | [ALAS2023-2026-1816](https://patchblox.com/security/data/fix/linux/alas2023-2026-1816.md) | Jun 8, 2026 | | Linux | kernel6.18 amzn 2023 | 1:6.18.25-55.108.amzn2023 | [ALAS2023-2026-1693](https://patchblox.com/security/data/fix/linux/alas2023-2026-1693.md) | May 8, 2026 | | Linux | kernel6.18-debuginfo amzn 2023 | 1:6.18.25-55.108.amzn2023 | [ALAS2023-2026-1693](https://patchblox.com/security/data/fix/linux/alas2023-2026-1693.md) | May 8, 2026 | | Linux | kernel6.18-debuginfo-common-aarch64 amzn 2023 | 1:6.18.25-55.108.amzn2023 | [ALAS2023-2026-1693](https://patchblox.com/security/data/fix/linux/alas2023-2026-1693.md) | May 8, 2026 | | Linux | kernel6.18-debuginfo-common-x86_64 amzn 2023 | 1:6.18.25-55.108.amzn2023 | [ALAS2023-2026-1693](https://patchblox.com/security/data/fix/linux/alas2023-2026-1693.md) | May 8, 2026 | | Linux | kernel6.18-devel amzn 2023 | 1:6.18.25-55.108.amzn2023 | [ALAS2023-2026-1693](https://patchblox.com/security/data/fix/linux/alas2023-2026-1693.md) | May 8, 2026 | | Linux | kernel6.18-headers amzn 2023 | 1:6.18.25-55.108.amzn2023 | [ALAS2023-2026-1693](https://patchblox.com/security/data/fix/linux/alas2023-2026-1693.md) | May 8, 2026 | | Linux | kernel6.18-modules-extra amzn 2023 | 1:6.18.25-55.108.amzn2023 | [ALAS2023-2026-1693](https://patchblox.com/security/data/fix/linux/alas2023-2026-1693.md) | May 8, 2026 | | Linux | kernel6.18-modules-extra-common amzn 2023 | 1:6.18.25-55.108.amzn2023 | [ALAS2023-2026-1693](https://patchblox.com/security/data/fix/linux/alas2023-2026-1693.md) | May 8, 2026 | | Linux | kernel6.18-tools amzn 2023 | 1:6.18.25-55.108.amzn2023 | [ALAS2023-2026-1693](https://patchblox.com/security/data/fix/linux/alas2023-2026-1693.md) | May 8, 2026 | | Linux | kernel6.18-tools-debuginfo amzn 2023 | 1:6.18.25-55.108.amzn2023 | [ALAS2023-2026-1693](https://patchblox.com/security/data/fix/linux/alas2023-2026-1693.md) | May 8, 2026 | | Linux | kernel6.18-tools-devel amzn 2023 | 1:6.18.25-55.108.amzn2023 | [ALAS2023-2026-1693](https://patchblox.com/security/data/fix/linux/alas2023-2026-1693.md) | May 8, 2026 | | Linux | linux Debian 12.15 (bookworm) | 6.1.176-1 | [DEBIAN-CVE-2026-31716](https://patchblox.com/security/data/fix/linux/debian-cve-2026-31716.md) | May 15, 2026 | | Linux | linux Debian 13.5 (trixie) | 6.12.85-1 | [DEBIAN-CVE-2026-31716](https://patchblox.com/security/data/fix/linux/debian-cve-2026-31716.md) | May 15, 2026 | | Linux | linux Debian 14 | 7.0.3-1 | [DEBIAN-CVE-2026-31716](https://patchblox.com/security/data/fix/linux/debian-cve-2026-31716.md) | May 15, 2026 | | Linux | perf amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | perf-debuginfo amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | perf6.12 amzn 2023 | 1:6.12.90-120.164.amzn2023 | [ALAS2023-2026-1816](https://patchblox.com/security/data/fix/linux/alas2023-2026-1816.md) | Jun 8, 2026 | | Linux | perf6.12-debuginfo amzn 2023 | 1:6.12.90-120.164.amzn2023 | [ALAS2023-2026-1816](https://patchblox.com/security/data/fix/linux/alas2023-2026-1816.md) | Jun 8, 2026 | | Linux | perf6.18 amzn 2023 | 1:6.18.25-55.108.amzn2023 | [ALAS2023-2026-1693](https://patchblox.com/security/data/fix/linux/alas2023-2026-1693.md) | May 8, 2026 | | Linux | perf6.18-debuginfo amzn 2023 | 1:6.18.25-55.108.amzn2023 | [ALAS2023-2026-1693](https://patchblox.com/security/data/fix/linux/alas2023-2026-1693.md) | May 8, 2026 | | Linux | python3-perf amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | python3-perf-debuginfo amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | python3-perf6.12 amzn 2023 | 1:6.12.90-120.164.amzn2023 | [ALAS2023-2026-1816](https://patchblox.com/security/data/fix/linux/alas2023-2026-1816.md) | Jun 8, 2026 | | Linux | python3-perf6.12-debuginfo amzn 2023 | 1:6.12.90-120.164.amzn2023 | [ALAS2023-2026-1816](https://patchblox.com/security/data/fix/linux/alas2023-2026-1816.md) | Jun 8, 2026 | | Linux | python3-perf6.18 amzn 2023 | 1:6.18.25-55.108.amzn2023 | [ALAS2023-2026-1693](https://patchblox.com/security/data/fix/linux/alas2023-2026-1693.md) | May 8, 2026 | | Linux | python3-perf6.18-debuginfo amzn 2023 | 1:6.18.25-55.108.amzn2023 | [ALAS2023-2026-1693](https://patchblox.com/security/data/fix/linux/alas2023-2026-1693.md) | May 8, 2026 | --- Data as of 2026-11-09T01:18:40Z UTC. 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