CVSS 5.5 · Medium EPSS 0,16%
Kerentanan NULL Pointer Dereference pada linux kernel. Skor CVSS 3.1 5.5 (Medium) menurut NVD.
Deskripsi (NVD)
In the Linux kernel, the following vulnerability has been resolved: usb: typec: ucsi: ccg: reject firmware images without a ':' record header do_flash() locates the first .cyacd record with p = strnchr(fw->data, fw->size, ':'); while (p < eof) { s = strnchr(p + 1, eof - p - 1, ':'); ... } If the firmware image contains no ':' byte, strnchr() returns NULL. NULL compares less than the valid kernel pointer eof, so the loop body runs and strnchr() is called with p + 1 == (void *)1 and a length of roughly (unsigned long)eof, causing a wonderful crash. The not_signed_fw fallthrough earlier in do_flash() and the chip-state branches in ccg_fw_update_needed() allow an unsigned blob to reach this loop, so a root user who can place a crafted file under /lib/firmware and write the do_flash sysfs attribute can trigger the oops. Bail out with -EINVAL when the initial strnchr() returns NULL.
Rincian
- Terbit di NVD
- 19 Juli 2026
- Terakhir diubah
- 30 Oktober 2026
- Status NVD
- Analyzed
- CVSS 3.1
- 5.5 (Medium), sumber NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H· uraikan di kalkulator - Jenis kelemahan (CWE)
- CWE-476: NULL Pointer Dereference
- EPSS (30 hari)
- 0,16% peluang dieksploitasi; lebih tinggi dari 4,7% CVE lain
Produk dan versi terdampak
| Vendor | Produk | Versi terdampak |
|---|---|---|
| linux | linux kernel | Versi 5.2 hingga sebelum 5.10.259 |
| linux | linux kernel | Versi 5.11 hingga sebelum 5.15.210 |
| linux | linux kernel | Versi 5.16 hingga sebelum 6.1.176 |
| linux | linux kernel | Versi 6.2 hingga sebelum 6.6.143 |
| linux | linux kernel | Versi 6.7 hingga sebelum 6.12.93 |
| linux | linux kernel | Versi 6.13 hingga sebelum 6.18.35 |
| linux | linux kernel | Versi 6.19 hingga sebelum 7.0.12 |
| linux | linux kernel | Versi 7.1 rc1 |
| linux | linux kernel | Versi 7.1 rc2 |
| linux | linux kernel | Versi 7.1 rc3 |
| linux | linux kernel | Versi 7.1 rc4 |
| linux | linux kernel | Versi 7.1 rc5 |
Referensi dan perbaikan
- https://git.kernel.org/stable/c/2f395ca1263bd181995eb829f5943a83a20db213 patch
- https://git.kernel.org/stable/c/3f432b8203066c26770fe6ea591361f10021dd6b patch
- https://git.kernel.org/stable/c/6526f8684f72391138353642af908803ba70795e patch
- https://git.kernel.org/stable/c/a38ed87818b2419090fb1a6338ddce6842b65dfa patch
- https://git.kernel.org/stable/c/b41dfc033fe594e152648050e95b9489cd53e9e3 patch
- https://git.kernel.org/stable/c/c4ee519b06389e59ba2d6aa722fcc4a02a8bbcbb patch
- https://git.kernel.org/stable/c/c8460de584fe5415d212cfdd127d4db90835a450 patch
- https://git.kernel.org/stable/c/d7486952bf74e546ee3748fb14b2d07881fa6273 patch