Amazon Linux 2023 : bpftool6.12, kernel6.12, kernel6.12-devel (ALAS2023-2026-1487)

high Nessus Plugin ID 304272

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Synopsis

The remote Amazon Linux 2023 host is missing a security update.

Description

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1487 advisory.

In the Linux kernel, the following vulnerability has been resolved:

md: suspend array while updating raid_disks via sysfs (CVE-2025-71225)

In the Linux kernel, the following vulnerability has been resolved:

btrfs: fix reservation leak in some error paths when inserting inline extent (CVE-2025-71268)

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nf_tables: fix inverted genmask check in nft_map_catchall_activate() (CVE-2026-23111)

In the Linux kernel, the following vulnerability has been resolved:

net: fix segmentation of forwarding fraglist GRO (CVE-2026-23154)

In the Linux kernel, the following vulnerability has been resolved:

efivarfs: fix error propagation in efivar_entry_get() (CVE-2026-23156)

In the Linux kernel, the following vulnerability has been resolved:

perf: sched: Fix perf crash with new is_user_task() helper (CVE-2026-23159)

In the Linux kernel, the following vulnerability has been resolved:

mm/shmem, swap: fix race of truncate and swap entry split (CVE-2026-23161)

In the Linux kernel, the following vulnerability has been resolved:

flex_proportions: make fprop_new_period() hardirq safe (CVE-2026-23168)

In the Linux kernel, the following vulnerability has been resolved:

mptcp: fix race in mptcp_pm_nl_flush_addrs_doit() (CVE-2026-23169)

In the Linux kernel, the following vulnerability has been resolved:

net/mlx5e: TC, delete flows only for existing peers (CVE-2026-23173)

In the Linux kernel, the following vulnerability has been resolved:

mm, shmem: prevent infinite loop on truncate race (CVE-2026-23177)

In the Linux kernel, the following vulnerability has been resolved:

ceph: fix NULL pointer dereference in ceph_mds_auth_match() (CVE-2026-23189)

In the Linux kernel, the following vulnerability has been resolved:

scsi: target: iscsi: Fix use-after-free in iscsit_dec_session_usage_count() (CVE-2026-23193)

In the Linux kernel, the following vulnerability has been resolved:

KVM: Don't clobber irqfd routing type when deassigning irqfd (CVE-2026-23198)

In the Linux kernel, the following vulnerability has been resolved:

procfs: avoid fetching build ID while holding VMA lock (CVE-2026-23199)

In the Linux kernel, the following vulnerability has been resolved:

ipv6: Fix ECMP sibling count mismatch when clearing RTF_ADDRCONF (CVE-2026-23200)

In the Linux kernel, the following vulnerability has been resolved:

ceph: fix oops due to invalid pointer for kfree() in parse_longname() (CVE-2026-23201)

In the Linux kernel, the following vulnerability has been resolved:

spi: tegra210-quad: Protect curr_xfer in tegra_qspi_combined_seq_xfer (CVE-2026-23202)

In the Linux kernel, the following vulnerability has been resolved:

net/sched: cls_u32: use skb_header_pointer_careful() (CVE-2026-23204)

In the Linux kernel, the following vulnerability has been resolved:

smb/client: fix memory leak in smb2_open_file() (CVE-2026-23205)

In the Linux kernel, the following vulnerability has been resolved:

macvlan: fix error recovery in macvlan_common_newlink() (CVE-2026-23209)

In the Linux kernel, the following vulnerability has been resolved:

bonding: annotate data-races around slave->last_rx (CVE-2026-23212)

In the Linux kernel, the following vulnerability has been resolved:

btrfs: reject new transactions if the fs is fully read-only (CVE-2026-23214)

In the Linux kernel, the following vulnerability has been resolved:

x86/vmware: Fix hypercall clobbers (CVE-2026-23215)

In the Linux kernel, the following vulnerability has been resolved:

scsi: target: iscsi: Fix use-after-free in iscsit_dec_conn_usage_count() (CVE-2026-23216)

In the Linux kernel, the following vulnerability has been resolved:

mm/slab: Add alloc_tagging_slab_free_hook for memcg_alloc_abort_single (CVE-2026-23219)

In the Linux kernel, the following vulnerability has been resolved: xfs: fix UAF in xchk_btree_check_block_owner We cannot dereference bs->cur when trying to determine if bs->cur aliases bs->sc->sa.{bno,rmap}_cur after the latter has been freed. Fix this by sampling before type before any freeing could happen. The correct temporal ordering was broken when we removed xfs_btnum_t.
(CVE-2026-23223)

In the Linux kernel, the following vulnerability has been resolved: erofs: fix UAF issue for file-backed mounts w/ directio option [ 9.269940][ T3222] Call trace: [ 9.269948][ T3222] ext4_file_read_iter+0xac/0x108 [ 9.269979][ T3222] vfs_iocb_iter_read+0xac/0x198 [ 9.269993][ T3222] erofs_fileio_rq_submit+0x12c/0x180 [ 9.270008][ T3222] erofs_fileio_submit_bio+0x14/0x24 [ 9.270030][ T3222] z_erofs_runqueue+0x834/0x8ac [ 9.270054][ T3222] z_erofs_read_folio+0x120/0x220 [ 9.270083][ T3222] filemap_read_folio+0x60/0x120 [ 9.270102][ T3222] filemap_fault+0xcac/0x1060 [ 9.270119][ T3222] do_pte_missing+0x2d8/0x1554 [ 9.270131][ T3222] handle_mm_fault+0x5ec/0x70c [ 9.270142][ T3222] do_page_fault+0x178/0x88c [ 9.270167][ T3222] do_translation_fault+0x38/0x54 [ 9.270183][ T3222] do_mem_abort+0x54/0xac [ 9.270208][ T3222] el0_da+0x44/0x7c [ 9.270227][ T3222] el0t_64_sync_handler+0x5c/0xf4 [ 9.270253][ T3222] el0t_64_sync+0x1bc/0x1c0 EROFS may encounter above panic when enabling file-backed mount w/ directio mount option, the root cause is it may suffer UAF in below race condition: - z_erofs_read_folio wq s_dio_done_wq - z_erofs_runqueue - erofs_fileio_submit_bio - erofs_fileio_rq_submit - vfs_iocb_iter_read - ext4_file_read_iter - ext4_dio_read_iter - iomap_dio_rw :
bio was submitted and return -EIOCBQUEUED - dio_aio_complete_work - dio_complete - dio->iocb->ki_complete (erofs_fileio_ki_complete()) - kfree(rq) : it frees iocb, iocb.ki_filp can be UAF in file_accessed(). - file_accessed : access NULL file point Introduce a reference count in struct erofs_fileio_rq, and initialize it as two, both erofs_fileio_ki_complete() and erofs_fileio_rq_submit() will decrease reference count, the last one decreasing the reference count to zero will free rq. (CVE-2026-23224)

In the Linux kernel, the following vulnerability has been resolved: smb: client: split cached_fid bitfields to avoid shared-byte RMW races is_open, has_lease and on_list are stored in the same bitfield byte in struct cached_fid but are updated in different code paths that may run concurrently. Bitfield assignments generate byte read-modify-write operations (e.g. `orb $mask, addr` on x86_64), so updating one flag can restore stale values of the others. A possible interleaving is: CPU1: load old byte (has_lease=1, on_list=1) CPU2: clear both flags (store 0) CPU1: RMW store (old | IS_OPEN) -> reintroduces cleared bits To avoid this class of races, convert these flags to separate bool fields. (CVE-2026-23230)

In the Linux kernel, the following vulnerability has been resolved:

net: gro: fix outer network offset (CVE-2026-23254)

In the Linux kernel, the following vulnerability has been resolved:

regmap: maple: free entry on mas_store_gfp() failure (CVE-2026-23260)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Run 'dnf update kernel6.12 --releasever 2023.10.20260325' or or 'dnf update --advisory ALAS2023-2026-1487 --releasever 2023.10.20260325' to update your system.

Plugin Details

Severity: High

ID: 304272

File Name: al2023_ALAS2023-2026-1487.nasl

Version: 1.1

Type: local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 3/30/2026

Updated: 3/30/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C

CVSS Score Source: CVE-2026-23224

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:python3-perf6.12, p-cpe:/a:amazon:linux:kernel6.12-libbpf, p-cpe:/a:amazon:linux:kernel6.12, p-cpe:/a:amazon:linux:kernel6.12-libbpf-static, p-cpe:/a:amazon:linux:kernel6.12-tools-devel, p-cpe:/a:amazon:linux:kernel6.12-libbpf-debuginfo, p-cpe:/a:amazon:linux:kernel6.12-headers, p-cpe:/a:amazon:linux:kernel6.12-modules-extra, p-cpe:/a:amazon:linux:kernel-livepatch-6.12.73-95.123, p-cpe:/a:amazon:linux:kernel6.12-debuginfo, p-cpe:/a:amazon:linux:bpftool6.12-debuginfo, p-cpe:/a:amazon:linux:bpftool6.12, p-cpe:/a:amazon:linux:kernel6.12-debuginfo-common-x86_64, p-cpe:/a:amazon:linux:perf6.12, p-cpe:/a:amazon:linux:perf6.12-debuginfo, p-cpe:/a:amazon:linux:kernel6.12-debuginfo-common-aarch64, p-cpe:/a:amazon:linux:kernel6.12-modules-extra-common, cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:kernel6.12-devel, p-cpe:/a:amazon:linux:kernel6.12-tools-debuginfo, p-cpe:/a:amazon:linux:python3-perf6.12-debuginfo, p-cpe:/a:amazon:linux:kernel6.12-libbpf-devel, p-cpe:/a:amazon:linux:kernel6.12-tools

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 3/27/2026

Vulnerability Publication Date: 2/13/2026

Reference Information

CVE: CVE-2025-71225, CVE-2025-71268, CVE-2026-23111, CVE-2026-23154, CVE-2026-23156, CVE-2026-23159, CVE-2026-23161, CVE-2026-23168, CVE-2026-23169, CVE-2026-23173, CVE-2026-23177, CVE-2026-23189, CVE-2026-23193, CVE-2026-23198, CVE-2026-23199, CVE-2026-23200, CVE-2026-23201, CVE-2026-23202, CVE-2026-23204, CVE-2026-23205, CVE-2026-23209, CVE-2026-23212, CVE-2026-23214, CVE-2026-23215, CVE-2026-23216, CVE-2026-23219, CVE-2026-23223, CVE-2026-23224, CVE-2026-23230, CVE-2026-23254, CVE-2026-23260

Detections

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