CVE-2026-43458
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
serial: caif: hold tty->link reference in ldisc_open and ser_release
In the Linux kernel, the following vulnerability has been resolved: serial: caif: hold tty->link reference in ldisc_open and ser_release A reproducer triggers a KASAN slab-use-after-free in pty_write_room() when caif_serial's TX path calls tty_write_room(). The faulting access is on tty->link->port. Hold an extra kref on tty->link for the lifetime of the caif_serial line discipline: get it in ldisc_open() and drop it in ser_release(), and also drop it on the ldisc_open() error path. With this change applied, the reproducer no longer triggers the UAF in my testing.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| e31d5a05948e4478ba8396063d1e1f39880928e2 | affected | git | 23a3ac2e2262a291498567418227b99e1f3606b1 | Unavailable | None listed |
| e31d5a05948e4478ba8396063d1e1f39880928e2 | affected | git | 52135420e9f75853ea0c6cea7b736e3e98495f7d | Unavailable | None listed |
| e31d5a05948e4478ba8396063d1e1f39880928e2 | affected | git | ca2ceba983bb23ea0202c2882d963253416654a3 | Unavailable | None listed |
| e31d5a05948e4478ba8396063d1e1f39880928e2 | affected | git | 8460187b4852fd00bd1c76394358053f3fa4d089 | Unavailable | None listed |
| e31d5a05948e4478ba8396063d1e1f39880928e2 | affected | git | 27e43356d0defb9fc7fa25265219a3ffeb7b3e98 | Unavailable | None listed |
| e31d5a05948e4478ba8396063d1e1f39880928e2 | affected | git | 35b58d3bc716ebb9ebd10fe1cac8c1177242511c | Unavailable | None listed |
| e31d5a05948e4478ba8396063d1e1f39880928e2 | affected | git | 97a0bb491cae39478c6225381f14e9ac67b7bba7 | Unavailable | None listed |
| e31d5a05948e4478ba8396063d1e1f39880928e2 | affected | git | 288598d80a068a0e9281de35bcb4ce495f189e2a | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 2.6.35 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 2.6.35 | Unavailable | None listed |
| 5.10.253 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.203 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.167 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.130 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.78 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.19 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 6.19.9 | unaffected | semver | Unavailable | 6.19.* | None listed |
| 7.0 | unaffected | original_commit_for_fix | Unavailable | * | None listed |