https://cve.radiocsirt.org/rss/recent/all/10 Most recent entries from all 2026-10-06T12:03:51.209255+00:00 Vulnerability-Lookup csirt@opendfir.org python-feedgen Contains only the most 10 recent entries. https://cve.radiocsirt.org/vuln/cve-2023-53331 CVE-2023-53331 — pstore/ram: Check start of empty przs during init 2026-10-06T12:03:51.310214+00:00

Affected: Linux

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

pstore/ram: Check start of empty przs during init

After commit 30696378f68a ("pstore/ram: Do not treat empty buffers as valid"), initialization would assume a prz was valid after seeing that the buffer_size is zero (regardless of the buffer start position). This unchecked start value means it could be outside the bounds of the buffer, leading to future access panics when written to:

sysdump_panic_event+0x3b4/0x5b8 atomic_notifier_call_chain+0x54/0x90 panic+0x1c8/0x42c die+0x29c/0x2a8 die_kernel_fault+0x68/0x78 __do_kernel_fault+0x1c4/0x1e0 do_bad_area+0x40/0x100 do_translation_fault+0x68/0x80 do_mem_abort+0x68/0xf8 el1_da+0x1c/0xc0 __raw_writeb+0x38/0x174 __memcpy_toio+0x40/0xac persistent_ram_update+0x44/0x12c persistent_ram_write+0x1a8/0x1b8 ramoops_pstore_write+0x198/0x1e8 pstore_console_write+0x94/0xe0 ...

To avoid this, also check if the prz start is 0 during the initialization phase. If not, the next prz sanity check case will discover it (start > size) and zap the buffer back to a sane state.

[kees: update commit log with backtrace and clarifications]

 https://cve.radiocsirt.org/vuln/rhsa-2025:19105 RHSA-2025:19105 — Red Hat Security Advisory: kernel security update 2026-10-06T12:03:51.310309+00:00

kernel: pstore/ram: Check start of empty przs during init kernel: block: fix adding folio to bio kernel: vsock/virtio: Validate length in packet header before skb_put() kernel: NFS: Fix filehandle bounds checking in nfs_fh_to_dentry() kernel: Linux kernel ALSA hda/ca0132 buffer overflow kernel: Linux kernel: Denial of Service via resource leak in SMB2 compound operations

 https://cve.radiocsirt.org/vuln/rhsa-2025:19886 RHSA-2025:19886 — Red Hat Security Advisory: kernel security update 2026-10-06T12:03:51.310342+00:00

kernel: fs: fix UAF/GPF bug in nilfs_mdt_destroy kernel: mm: fix zswap writeback race condition kernel: pstore/ram: Check start of empty przs during init kernel: mm: kmem: fix a NULL pointer dereference in obj_stock_flush_required() kernel: ethtool: check device is present when getting link settings kernel: NFS: Fix filehandle bounds checking in nfs_fh_to_dentry()