- —Not scoredno CVSS score yet
- 0.22%Exploitation in 30 daysEPSS · top 87% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: ieee802154: ca8210: fix pointer truncation in kfifo on 64-bit ca8210_test_int_driver_write() and ca8210_test_int_user_read() exchange a kmalloc'd buffer pointer through a struct kfifo, but pass a literal '4' as the byte count to kfifo_in()/kfifo_out(). This is correct on 32-bit (pointer = 4 bytes), but on 64-bit only the low 4 bytes of the 8-byte pointer are written into the FIFO. The reader then reads back 4 bytes into an 8-byte local pointer variable, leaving the upper 4 bytes uninitialized stack data. The first dereference of the reconstructed pointer (fifo_buffer[1]) accesses an arbitrary kernel address and generally results in an oops. Use sizeof(fifo_buffer) so the byte count matches pointer width on every architecture. The driver has no architecture restriction in Kconfig, so any 64-bit build with CONFIG_IEEE802154_CA8210_DEBUGFS=y is exposed. Issue has been latent since the driver was added in 2017 because it is most commonly deployed on 32-bit MCUs. Found via a custom Coccinelle semantic patch hunting for short-byte kfifo I/O on byte-mode kfifos used to shuttle pointers.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 2 days later
· 2 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.22% · top 87% of all CVEs (11 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected ded845a781a578dfb0b5b2c138e5a067aa3b1242 – < 2c1664ccfae653979b38788211240b5a1ee317ed
- affected ded845a781a578dfb0b5b2c138e5a067aa3b1242 – < 093aacb0c56d5c693e3169a0224062e77c3fd0c0
- affected ded845a781a578dfb0b5b2c138e5a067aa3b1242 – < 87dab14a4f68895d6f4d798e6ee3556cd64e8c72
- affected ded845a781a578dfb0b5b2c138e5a067aa3b1242 – < 1fe2643d0b24ca3cdd61a31a45c2d3233dc6cbfe
- affected ded845a781a578dfb0b5b2c138e5a067aa3b1242 – < 65dc342274a01616f5c17105f7360a3b4bfd7a3d
- affected ded845a781a578dfb0b5b2c138e5a067aa3b1242 – < 2059c28bd725beded01277cdf1f67be33e714323
- affected ded845a781a578dfb0b5b2c138e5a067aa3b1242 – < d8ce67fa6a5e6929f5414e933ff9665176c2bce6
- affected ded845a781a578dfb0b5b2c138e5a067aa3b1242 – < 6d7f7bcf225b2d566176bf6229dbd1252940cb3c
- affected 4.12
- unaffected < 4.12
- unaffected 5.10.261 – ≤ 5.10.*
- unaffected 5.15.212 – ≤ 5.15.*
- unaffected 6.1.178 – ≤ 6.1.*
- unaffected 6.6.145 – ≤ 6.6.*
- unaffected 6.12.97 – ≤ 6.12.*
- unaffected 6.18.40 – ≤ 6.18.*
- unaffected 7.1.5 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References8
- https://git.kernel.org/stable/c/2c1664ccfae653979b38788211240b5a1ee317ed (opens in a new tab)
- https://git.kernel.org/stable/c/093aacb0c56d5c693e3169a0224062e77c3fd0c0 (opens in a new tab)
- https://git.kernel.org/stable/c/87dab14a4f68895d6f4d798e6ee3556cd64e8c72 (opens in a new tab)
- https://git.kernel.org/stable/c/1fe2643d0b24ca3cdd61a31a45c2d3233dc6cbfe (opens in a new tab)
- https://git.kernel.org/stable/c/65dc342274a01616f5c17105f7360a3b4bfd7a3d (opens in a new tab)
- https://git.kernel.org/stable/c/2059c28bd725beded01277cdf1f67be33e714323 (opens in a new tab)
- https://git.kernel.org/stable/c/d8ce67fa6a5e6929f5414e933ff9665176c2bce6 (opens in a new tab)
- https://git.kernel.org/stable/c/6d7f7bcf225b2d566176bf6229dbd1252940cb3c (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-59005 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-72047)Record last updated .