isofs: bound Rock Ridge symlink components to the SL record
In the Linux kernel, the following vulnerability has been resolved: isofs: bound Rock Ridge symlink components to the SL record get_symlink_chunk() and the SL handling in parse_rock_ridge_inode_internal() walk the variable-length components of a Rock Ridge "SL" (symbolic link) record. Each component is a two-byte header (flags, len) followed by len bytes of text, so it occupies slp->len + 2 bytes. Both loops read slp->len and advance to the next component, and get_symlink_chunk() additionally does memcpy(rpnt, slp->text, slp->len), but neither checks that the component lies within the SL record before dereferencing it. A crafted SL record whose component declares a len that runs past the record (rr->len) therefore triggers an out-of-bounds read of up to 255 bytes. When the record sits at the tail of its backing buffer - for example a small kmalloc()ed continuation block reached through a CE record - the read crosses the allocation; get_symlink_chunk() then copies the out-of-bounds bytes into the symlink body returned to user space by readlink(), disclosing adjacent kernel memory. ISO 9660 images are routinely mounted from untrusted removable media - desktop environments auto-mount them (e.g. via udisks2) without CAP_SYS_ADMIN - so the record contents are attacker-controlled. Reject any component that does not fit in the remaining record bytes before using it. In get_symlink_chunk() return NULL, like the existing output-buffer (plimit) checks, so a malformed record makes readlink() fail with -EIO rather than silently returning a truncated target; in parse_rock_ridge_inode_internal() stop the inode-size walk.
- Published
- Jul 25, 2026
- Updated
- Sep 8, 2026
- EPSS
- 0.2% · 5th percentile
- CWE
- CWE-125
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Report tools
Action score
28
Monitor
Low priority for now.
- CVSS
- 28 / 40 · 7.1 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.2%
CNA vs NVD score
- NVD
- —
- CNA · Linux
- 7.1
- NVD has not scored this yet; the score shown is the CNA’s.
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- linux linux kernel2.6.12.1 and later · before 5.10.261
- linux linux kernel5.11 and later · before 5.15.212
- linux linux kernel5.16 and later · before 6.1.178
- linux linux kernel6.2 and later · before 6.6.145
- linux linux kernel6.7 and later · before 6.12.96
- linux linux kernel6.13 and later · before 6.18.39
- linux linux kernel6.19 and later · before 7.1.4
- linux linux kernel2.6.12
Versions reported by the vendor
Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.
Linux Linux
- 2.6.12affected
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 1015e1c4b2fadd9c09704e24738e46598778c869affected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 36fe7d25dbc40da0c6b1dd4513a4f69ac6164eeeaffected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before a22cb6bb54dc167047ea9e70d97dfbc2c15649e3affected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before b736b12108fd116c41777628f5a333791604df26affected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 6bf41db09ef935d76fcc84ccf213b42c18de95eeaffected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before b5699642640d6cff357638738c5293985cd5a53daffected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 9830725078c8483c6831ec10222ae724806ea36baffected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 5fa1d6a5ec2356d2107dead614437c66fa7138b1affected · git
- before 2.6.12not affected · semver
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | linux | before 6.1.180-1 | 6.1.180-1 |
| Debian:12 | linux-6.12 | before 6.12.100-1~deb12u1 | 6.12.100-1~deb12u1 |
| Debian:13 | linux | before 6.12.96-1 | 6.12.96-1 |
| Debian:14 | linux | before 7.1.4-1 | 7.1.4-1 |
Same product
linux: all recordsOther highest-scoring records for the same primary product.
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- CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV83Now
- CVE-2019-13272In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to creKEV77This week
- CVE-2013-6282The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the v6k and v7 ARM platforms do not validate certain addKEV77This week
- CVE-2013-2094The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9 uses an incorrect integer data type, which allows loKEV77This week
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Linux Linux | 1015e1c4b2fadd9c09704e24738e46598778c869 | Vendor (CNA) |
| Linux Linux | 36fe7d25dbc40da0c6b1dd4513a4f69ac6164eee | Vendor (CNA) |
| Linux Linux | 5fa1d6a5ec2356d2107dead614437c66fa7138b1 | Vendor (CNA) |
| Linux Linux | 6bf41db09ef935d76fcc84ccf213b42c18de95ee | Vendor (CNA) |
| Linux Linux | 9830725078c8483c6831ec10222ae724806ea36b | Vendor (CNA) |
| Linux Linux | a22cb6bb54dc167047ea9e70d97dfbc2c15649e3 | Vendor (CNA) |
| Linux Linux | b5699642640d6cff357638738c5293985cd5a53d | Vendor (CNA) |
| Linux Linux | b736b12108fd116c41777628f5a333791604df26 | Vendor (CNA) |
| azl3 kernel 6.6.144.1-1 on Azure Linux 3.0 | 6.6.145.2-1 · CBL-Mariner Releases | Microsoft (MSRC) |
| debian:linux | 6.1.180-1 · Debian:12 | Package registry (OSV) |
| debian:linux-6.12 | 6.12.100-1~deb12u1 · Debian:12 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-125 · Out-of-bounds ReadCVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- git.kernel.org/stable/c/1015e1c4b2fadd9c09704e24738e46598778c869
- git.kernel.org/stable/c/36fe7d25dbc40da0c6b1dd4513a4f69ac6164eee
- git.kernel.org/stable/c/5fa1d6a5ec2356d2107dead614437c66fa7138b1
- git.kernel.org/stable/c/6bf41db09ef935d76fcc84ccf213b42c18de95ee
- git.kernel.org/stable/c/9830725078c8483c6831ec10222ae724806ea36b
- git.kernel.org/stable/c/a22cb6bb54dc167047ea9e70d97dfbc2c15649e3
- git.kernel.org/stable/c/b5699642640d6cff357638738c5293985cd5a53d
- git.kernel.org/stable/c/b736b12108fd116c41777628f5a333791604df26
- cert-portal.siemens.com/productcert/html/ssa-019113.html
Vendor advisories and official records. Exploit/PoC links are deliberately left out.