Answer in brief
CVE-2023-54198 records a High severity (CVSS 7.8) vulnerability in tty: fix out-of-bounds access in tty_driver_lookup_tty(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=99f1fe189daf8e99a847e420567e49dd7ee2aae7 <3df6f492f500a16c231f07ccc6f6ed1302caddf9 || >=99f1fe189daf8e99a847e420567e49dd7ee2aae7 <b79109d6470aaae7062998353e3a19449055829d || >=99f1fe189daf8e99a847e420567e49dd7ee2aae7 <953a4a352a0c185460ae1449e4c6e6658e55fdfc || >=99f1fe189daf8e99a847e420567e49dd7ee2aae7 <84ea44dc3e4ecb2632586238014bf6722aa5843b || >=99f1fe189daf8e99a847e420567e49dd7ee2aae7 <f9d9d25ad1f0d060eaf297a2f7f03b5855a45561 || >=99f1fe189daf8e99a847e420567e49dd7ee2aae7 <765566110eb0da3cf60198b0165ecceeaafa6444 || >=99f1fe189daf8e99a847e420567e49dd7ee2aae7 <fcfeaa570f7a5c2d5f4f14931909531ff18b7fde || >=99f1fe189daf8e99a847e420567e49dd7ee2aae7 <db4df8e9d79e7d37732c1a1b560958e8dadfefa1 | 3df6f492f500a16c231f07ccc6f6ed1302caddf9, b79109d6470aaae7062998353e3a19449055829d, 953a4a352a0c185460ae1449e4c6e6658e55fdfc, 84ea44dc3e4ecb2632586238014bf6722aa5843b, f9d9d25ad1f0d060eaf297a2f7f03b5855a45561, 765566110eb0da3cf60198b0165ecceeaafa6444, fcfeaa570f7a5c2d5f4f14931909531ff18b7fde, db4df8e9d79e7d37732c1a1b560958e8dadfefa1 |
| Linux/Linuxgeneric | 2.6.28 | Not reported |
Published upstream
Dec 30, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 28, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: tty: fix out-of-bounds access in tty_driver_lookup_tty() When specifying an invalid console= device like console=tty3270, tty_driver_lookup_tty() returns the tty struct without checking whether index is a valid number. To reproduce: qemu-system-x86_64 -enable-kvm -nographic -serial mon:stdio \ -kernel ../linux-build-x86/arch/x86/boot/bzImage \ -append "console=ttyS0 console=tty3270" This crashes with: [ 0.770599] BUG: kernel NULL pointer dereference, address: 00000000000000ef [ 0.771265] #PF: supervisor read access in kernel mode [ 0.771773] #PF: error_code(0x0000) - not-present page [ 0.772609] Oops: 0000 [#1] PREEMPT SMP PTI [ 0.774878] RIP: 0010:tty_open+0x268/0x6f0 [ 0.784013] chrdev_open+0xbd/0x230 [ 0.784444] ? cdev_device_add+0x80/0x80 [ 0.784920] do_dentry_open+0x1e0/0x410 [ 0.785389] path_openat+0xca9/0x1050 [ 0.785813] do_filp_open+0xaa/0x150 [ 0.786240] file_open_name+0x133/0x1b0 [ 0.786746] filp_open+0x27/0x50 [ 0.787244] console_on_rootfs+0x14/0x4d [ 0.787800] kernel_init_freeable+0x1e4/0x20d [ 0.788383] ? rest_init+0xc0/0xc0 [ 0.788881] kernel_init+0x11/0x120 [ 0.789356] ret_from_fork+0x22/0x30
Quoted source text, attributed separately from HOL analysis.